Shure dynaamiset klassikot – ammattilaisten luottotyökalut vuodesta 1939

Meidän superlatiivisessa nykymaailmassa on vaikea yliarvioida Shuren klassikkomikkien todellista vaikutusta, silloin kun ne ilmestyivät audiomiesten työkalupakkeihin 1930-60-luvuilla. Shuren SM57 ja SM58 näkyvät edelleen laajassa käytössä maailman lavoilla ja studioissa.

Shure-tuotteiden alkuperäinen myyntivaltti oli, että firman hyvänsoundiset mikrofonit kestivät mukisematta kovaakin käyttöä. Vuodesta 1939 Shuren mikkeillä on vahvistettu lukemattomia keikkoja, luentoja ja lähetyksiä. Ja matka jatkuu edelleen…

Katsotaan tässä jutussa hieman Shure-klassikoiden historiaa – mukana ovat mallit 55SH Series II, 545SD Unidyne III, 565SD Unisphere I, SM57, sekä SM58.

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1930-luvun puolivälissä ääniteknikot olivat jo tulleet siihen johtopäätökseen, että pallokuvioiset mikrofonit eivät olleet parhaita työkaluja live-äänen vahvistamiseen, niiden suuren feedback-riskin takia. Ratkaisukin tähän ongelmaan oli jo löydetty – se oli suunnattu mikrofoni (engl. unidirectional microphone) eli se, mitä nykyään tunnemme herttakuvioisena mikrofonina (engl. cardioid mic).

Suunnattu mikrofoni poimii äänen edestä ja hylkää suurimman osan sivuilta ja takaa tulevasta äänestä. Herttakuvio saavutetaan kontrolloidulla vaihevirheellä. 1930-luvun puolivälissä ainoat mikrofonit, jotka tarjosivat herttakuvion, olivat joko herkät ja kalliit kondensaattorimikrofonit (kahden membraanin kapselilla) tai isot ja kömpelöt kahdella kapselilla varustetut dynaamiset mallit (joissa usein yhdistetiin pallokuvioinen tavallinen dynaaminen kapseli, sekä nauhamikkiosio jolla oli suuntakuviona kahdeksikko).

Kaikkein tärkein läpimurto, joka teki Shuren ikonista Model 55 -mikkiä mahdolliseksi, oli Ben Bauerin Unidyne-kapseli. Liikkuvalla kelalla toimiva Unidyne-kapseli onnistuu hylkäämään takaa tulevat äänet kapselin monimutkaisen äänikanava-järjestelmän avulla, joka johtaa takaa tulevat äänet useiden eri reittien kautta membraanille, mikä puolestaan johtaa kontrolloituun vaihevirheen. Vaihevirheen ansiosta mikrofonin takaa tulvat signaalit putoavat mikrofonin vahvistetusta signaalista pois.

Shuren suunnitteluryhmä myös onnistui keksimään 55-mallille hyvin tukevan ja (siihen aikaan) kompaktin metallirungon, valmiiksi sisäänrakennetulla kääntevällä adapterilla.

Alkuperäinen Shure Model 55 (tunnetaan nykyään nimellä ”Fat Boy” sen suuremman, pyöreän kotelon vuoksi) oli se, mitä äänimiehet olivat odottaneet. Tässä oli kompakti mikrofoni, joka mahdollisti signaalin voimakasta vahvistusta vain pienellä feedback-vaaralla. Lisäksi 55:n soundi oli laadukas, ja mikrofoni itse hyvin tukevasti toteutettu.

Vuonna 1951 Shure 55 sai päivitetyn kapselin (Unidyne II), sekä vielä kompaktimman rungon (Shure 55SH; SH = small housing).

Mikin nykyinen versio – Shure 55SH Series II – ilmestyi 1980-luvun lopussa. Kapseli oli jälleen päivitetty (Unidyne III) ja samalla kapselin ripustusta on parannettu. Mikronissa on nytkin edellisen version päälle/pois-kytkin.

Koska 55SH oli se mikrofoni, jolla nuori Elvis nähtiin usein, tätä ikonista Shure-mallia kutsutaan edelleen laajalti ”Elvis-mikrofoniksi”.

Vaikka Shure 55SH Series II nähdään nykyään usein pelkkänä rekvisiittana filmeissä, musiikkivideoissa ja mainoksissa – etenkin jos halutaan välittää tiettyä vanhan ajan hohtoa – on tämä malli edelleen validi valinta livekäyttöön.

Kapselin sijoituksesta suuren metallikotelon sisällä johtuu 55SH:n hieman keskivoittoinen klangi (jos vertaa nykymikkeihin). Malli on myös hieman herkempi puhallusäänille ja koville konsonanteille (p, t, k), mikä on otettavaa huomioon laulajan mikrofonitekniikassa.

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1950-luvun lopulla tyylit, musiikin genret ja tekniikka olivat kaikki edenneet, ja ääniteknikot alkoivat pyytää entistä pienempiä mikrofoneja.

Ernie Seeler -niminen Shuren insinööri sai aikaansa aikamoisen jättipotin kehittämällä kaikkien aikojen ensimmäisen kädellä pidettävän dynaamisen mikin, johon laulettiin (tai puhuttiin) sen edestä (engl. end-firing).

Tätä vuonna 1959 esiteltyä uutta mallia kutsuttiin nimellä Shure 545SD. 545SD sisälsi useita parannuksia, joista tärkein oli pneumaattisesti asennettu Unidyne III -kapseli.

Kapselin pneumaattinen iskunvaimennus vähensi käsittelyääniä huomattavasti ja teki mikrofonin pitämisestä kädessä realistisen vaihtoehdon ensimmäistä kertaa mikrofonien historiassa.

Shuren 545SD:ssä voi vaihtaa matalasta impedanssista korkeaan, koska 50-luvun lopussa (ja 60-luvun alussa) oli vielä runsaasti korkeaimpedanssisia äänilaitteita. Nykyään enimmäkseen Blues-harpun soittajat käyttävät high-Z-asetusta mikrofonin liittämiseen suoraan kitaravahvistimeen.

Ernie Seeler kehitti myös nerokkaan magneettisen päälle/pois-kytkimen, joka ei poksahda tai rätisee käytössä, ja joka voidaan myös haluttaessa lukita ”päällä”-asentoon.

Vaikka Shure 545SD nähdään nykyään enemmän instrumenttimikrofonina, se oli aikoinaan myös erittäin suosittu valinta laulajien keskuudessa. Esimerkiksi Beach Boys -yhtiön Brian Wilson valitsi usein studiossa 545SD:n laulumikrofoniksi ”Pet Sounds-” ja ”Smiley Smile” -sessioiden aikana.

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Ernie Seeler vei asioita vielä hieman pidemmälle seuraavalla luomuksellaan – Shure 565SD Unisphere I.

Shure 565SD perustuu 545SD:hen, mutta se lisää malliin tukevan pallomaisen tuulisuojan. Sisäänrakennettua pop-filtteriä on erittäin helppo vaihtaa, jos se vaurioituu vakavasti.

Sen lisäksi, että pallofiltteri suodattaa onnistuneesti puhallusäänet ja konsonantit 565SD:n signaalista, se johtaa myös hieman erilaiseen taajuusvasteeseen verrattuna 545SD:hen.

565SD:n suuri suosio on tehty mallin ulkomuodosta jonkinlaista kultastandardia laulumikrofoniksi. Sen legendaarinen asema johtuu osittain myös siitä, että se valittiin ainoaksi mikrofonimalliksi alkuperäisessä Woodstock-festarissa. Shure 565SD oli myös Freddie Mercuryn suosikki live-mikrofoni (”Eeeeeeeee-jo!”).

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Syy siihen, miksi Shuren SM57 esiteltiin niin pian 545SD:n jälkeen, löytyy television suosiosta 1960-luvulla.

TV-studiot rakastivat 545SD:n ääntä ja kompaktia kokoa, mutta he eivät pitäneet Shure-mallin kiiltävistä, heijastavista pinnoista, jotka tekivät valaisemisesta vaikeaa.

Shure SM57 -malli (”SM” tarkoittaa ”studiomikrofonia”) ratkaisi nämä ongelmat tarjoamalla mikrofonin, jonka muoto on sama kuin 545SD:ssä, mutta joka on nyt päällystetty heijastamattomalla, mattapintaisella ja tummanharmaalla viimeistelyllä. Samaan aikaan Seeler ja hänen tiiminsä poistivat myös kaksoisimpedanssiominaisuuden – joka oli tarpeeton ammattimaisessa TV-studiossa – ja on/off-kytkimen, jota ei haluttu TV-studiossa. He myös hienosäätivät osan kapselin teknisistä yksityiskohdista.

Vaikka Shure SM57:ää mainostetaan instrumenttimikrofonina, se toimii myös erittäin hyvin laulumikrofonina. Hyviä esimerkkejä ovat lukemattomat Status Quon ja Motörheadin live-esitykset, sekä SM57:n käyttö laulumikrofonina Peter Gabrielin klassikkoalbuminsa ”So” äänityksissä.

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Shure SM58 on 565SD-mallille sama kuin SM57 on 545SD:lle – hieman parannettu, uudempi versio, joka on tehty erityisesti TV-studion valaistukseen.

SM58:n rungossa on sama tummanharmaa mattapinta, joka löytyy myös SM57:stä.

Pallomuotoista pop-filtteriäkin on uudistettu entistäkin tukevammaksi, ja sen pinnoite on heijastamaton.

Shuren SM58 on kenties maailman tunnetuin laulumikki ikinä, joka löytyy lähes kaikista konserttipaikoista.

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Olen tehnyt muutaman videon, josta saa käsityksen siitä, miltä nämä klassikkomikrofonit kuulostavat.

Shure’s dynamic classics – keeping the show on the road since 1939

In this world of ever-heightening hyperbole, it is hard to overstate the impact Shure’s classic dynamic microphone models had when they first came out in the Thirties, Forties, Fifties and Sixties of the last century. This impact can still be felt today – the Shure SM57 and SM58 models are continuing to be ubiquitous on stages and in studios all over the globe.

What Shure managed to do then – and continues to do to this day – was to come up with sturdy, yet good sounding mics that put the proverbial show on the road in 1939. And the show still goes on…

Let’s take a look at the history and the features of Shure’s bonafide classics – the 55SH Series II, the 545SD Unidyne III, the 565SD Unisphere I, the SM57, and the SM58.

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By the mid-1930s sound engineers had already come to the conclusion that omnidirectional microphones weren’t really the best tools for live sound applications, due to the high risk of feedback from the PA system. The solution to this problem had also been found already – the unidirectional microphone, or what we now know as the cardioid mic.

The cardioid mic picks up sound from its front, while rejecting most of the sound coming in from the sides and the back. The cardioid pattern is achieved by controlled phase cancellation. In the mid-1930s the only microphones offering a cardioid pickup pattern were either delicate and expensive condenser microphones (with two wafer-thin diaphragms) or cumbersome twin-capsule dynamic models (often combining an omnidirectional moving-coil dynamic with a figure-8 ribbon capsule).

The all-important breakthrough that made Shure’s iconic Model 55 possible was Ben Bauer’s development of the Unidyne-capsule. The moving-coil Unidyne-capsule manages to reject sound from the back by an elaborate system of air vents in the cartridge that lead to the sound from the back travelling to the diaphragm in several different ways, which in turn results in controlled phase cancellation.

Shure’s R & D team also managed to come up with a – for that time – extremely compact and very sturdy cast metal housing with a built-in swivel adapter.

The original Shure Model 55 (today known as the ”Fat Boy” for its larger, rounded housing) was what sound engineers had waited for. Here was a compact mic that gave you superior gain-before-feedback coupled with a very decent sound quality in a sturdy, roadworthy package.

In 1951 the Shure 55 was overhauled with an improved Unidyne II capsule and a smaller housing (55SH).

The current model – the Shure 55SH Series II – was introduced in the late 1980s, and features an updated cartridge (the Unidyne III) and an improved shock-mount for the capsule. It kept the on/off-switch from its predecessor.

Due to the fact that the 55SH was the mic that the young Elvis was often seen with, this iconic Shure is still widely called the ”Elvis mic”.

The Shure 55SH Series II still does have a place as a ”working mic”, besides being used in movies, commercials and music videos, whenever the makers try to delve into vintage chic and panache.

Due to the placement of the cartridge inside the large metal housing the 55SH’s sound is a little bit more mid-centred than more modern dynamic vocal mics. It can also be a tad more sensitive to wind noise and plosives, which has to be taken into account during the placement and use of the microphone.

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By the late 1950s times, styles, musical genres and technology had all moved on, and sound technicians started to ask for even smaller microphones.

A Shure engineer by the name of Ernie Seeler hit the proverbial jackpot by developing the first-ever handheld, end-firing, unidirectional moving-coil microphone.

This new model – introduced in 1959 – was called the Shure 545SD. The 545SD encompassed a whole number of improvements, the most important one being the pneumatically mounted Unidyne III capsule.

The pneumatic shock-mount reduces handling noise drastically, and it made holding the microphone in your hand a realistic option for the first time.

The Shure 545SD is a dual-impedance mic, because back in the late-50s/early-60s there was still plenty of high-impedance audio equipment around. These days it’s mostly Blues harp players, who use the high-Z setting to connect the mic to a guitar amplifier.

Ernie Seeler also came up with an ingenious magnetic on/off-switch that doesn’t pop or crackle in use, and that can also be locked in the ”on” position if desired.

Although the Shure 545SD is seen more as an instrument microphone these days, it was also a very popular choice for singers back in the day. The Beach Boys’ Brian Wilson often chose a 545SD in the studio for his lead vocals during the ”Pet Sounds” and ”Smiley Smile” era.

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Ernie Seeler took things a little bit further with his next design – the Shure 565SD Unisphere I.

The Shure 565SD is based on the 545SD, but adds a sturdy spheric windshield to the design. The built-in pop filter is very easy to replace, should it become seriously damaged.

In addition to improving the 565SD’s resistance to plosives and wind noise, the ball grille also leads to a slightly different frequency response, when compared to the 545SD.

The success of the 565SD has meant that its look has become the gold standard for handheld vocal microphones. Its legendary status is due to the fact that it was chosen as the only microphone model at the original Woodstock Festival. The Shure 565SD was also Freddie Mercury’s preferred live mic (”Aaayeee-oh!”).

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The reason Shure followed up the 545SD with the SM57 so quickly can be found in the popularity of TV in the 1960s.

TV studios loved the sound and compact size of the 545SD, but they disliked the shiny, reflective surfaces of the Shure model, that made lighting a chore.

The Shure SM57 (the ”SM” stands for ”studio mic”) addressed these issues, by providing a mic with the same slim shape as the 545SD, but now clad in a non-reflective, matte dark gray finish. While they were at it, Seeler and his team also did away with the dual-impedance feature – that was unnecessary in the professional TV studio – and with the on/off-switch – that was unwanted in the TV studio. They also fine-tuned the capsule’s detailed specifications.

Again, although the Shure SM57 is touted as an instrument microphone, it also performs very well as a vocal mic. Good examples are many live shows of Status Quo and Motörhead, as well as Peter Gabriel’s use of the SM57 for vocals during the recording of his classic album ”So”.

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The Shure SM58 is to the 565SD what the SM57 is to the 545SD – a slightly redesigned, newer version, made especially for use under TV studio lighting.

The SM58’s body sports the same dark gray matte finish also found on the SM57.

The ball grille has been redesigned to be even sturdier. Its finish is a non-reflective light gray.

The Shure SM58 is a true million-seller that has stood the test of time. This model can be found in most venues all over the globe.

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I’ve prepared a few videos to give you an idea of how these five classics perform.

Review: Vox VX15-GT

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The new Vox VX15-GT (street price in Finland approx. 155 €) is an ultra-light, modelling practice amp with a 15-watt power amp.

The VX15-GT shares the control panel and signal-processing blocks with its larger brother, the VX50-GTV, but with one crucial difference. While the larger combo’s preamp section utilises Vox’ proprietary Nutube – a modern, low voltage tube – the VX15-GT uses Vox’ patented VET (Virtual Element Technology) digital modelling architecture.

The Vox VX15-GT’s astonishingly low weight (of just under four kilos) is achieved by using a special cabinet that is molded completely from ABS-plastic, as well as the use of a modern, lightweight power amplifier.

The single speaker is a 6.5-inch Vox unit.

The combo is powered by 12 volts DC from an external, laptop style AC adapter.

The internal preset memory holds 11 slots for factory presets (one per amp model) plus two storable user presets. By connecting an optional Vox VFS5 footswitch the number of user presets can be increased to eight.

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The Vox VX15-GT’s top-facing control panel sports the typical control layout of most modelling practice amps:

Starting from the left we find an E-tuner above the guitar input. The tuner LEDs double as preset programme indicators – when all LEDS are off the combo is in manual mode, with all parameters corresponding to the current knob positions. The amp selector offers you ten different amplifier models – one Fender, two Dumbles, two Voxes, three Marshalls, one Soldano and one Mesa/Boogie. The Line setting disconnects the amp modelling section, so you can use the VX15-GT to amplify a line level signal, such as a synthesiser.

The four smaller knobs in the top row control the usual amplifier functions, namely gain, two-band EQ and programme volume.

The Modulation control lets you choose and adjust one of four different modulation effects – chorus, flanger, phaser (the abbreviation ”ORG” stands for the colour orange) and tremolo. The Modulation knob sweeps each effect’s speed from very slow to very fast. Here’s an audio clip running through the four modulation types, starting with the modulation section off:

The Delay/Reverb control lets you select one out of two delays or two reverbs. This control adjusts the chosen effect’s intensity (its volume in the mix), while the delay speed and the reverb length is set using the Tap Tempo button. For this clip I have set the delay time to almost full. I start off with a dry example and then play two examples of each effect, one with low and the other with high intensity:

As a demo song I recorded short cover version of the Weeknd’s song ”Blinding Lights”. All guitar tracks were played on a Gibson Melody Maker SG and recorded with a Shure SM57. I used only the Vox VX15-GT’s own effects:

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Once I got over the unusual, all-plastic construction of the new Vox combo, I was really taken with the range of different sounds and the decent amounts of volume the VX15-GT has to offer.

This is a very inspiring and lightweight package, which, in my view, will work best as a practice (or teaching) guitar combo or in a small home studio setting.

One ”hidden”, but very nifty, feature that I haven’t mentioned is the very efficient, built-in noise suppressor. I was able to use single-coil pickups in the highest gain settings, without any 50-cycle hum!

You cannot compare the 15 watts of solid state power output to the full-on blast of an all-valve Vox AC15, but stick a decent microphone in front of it and you could even use the VX15-GT for the occasional pub gig.

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Vox VX15-GT

Street price around 155 €

Finnish distributor: EM Nordic

Pros:

+ lightweight, ABS cabinet

+ decent presets

+ wide variety of amps

+ decent effects

+ sound

Cons:

– lightweight, ABS cabinetOSave

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Review: Bluetone Amps Fried Eye & Bugaboo distortion pedals

Finnish valve amp specialist Bluetone Custom Amplifiers has broken new ground by releasing a trio of handmade pedal effects, comprising a delay/reverb-unit, called Echoes, as well as two different preamp/distortion boxes, the Fried Eye and the Bugaboo.

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Bluetone’s Fried Eye Distortion (269 €) offers two high-quality effects in one box:

The boost circuit can be run separately from the pedal’s distortion side. It offers a considerable amount of boost (up to 12 dB), which is adjustable with the pedal’s Boost control.

But the Fried Eye Distortion’s main raison d’être is, of course, its comprehensive distortion section. The pedal’s distortion circuit is a solid-state version of the acclaimed Bluetone Fried Eye tube amplifier’s crunch channel. Its aim is to give you a wide range of Marshall-inspired crunch and distortion tones.

Bluetone’s Fried Eye Distortion pedal runs on nine to eighteen volts DC supplied by a PSU (not included) via a standard 2.1 mm plug (centre negative). A look under the hood reveals a large circuit board and clean and neat wiring.

Soundwise the Fried Eye pedal hits the bull’s-eye in my opinion, offering a wide range of Marshall-type tones from a light crunch to full blast. The effect’s three-band EQ works really well in tailoring the effects sound to your musical needs.

This short audio clip gives you an idea of the Fried Eye’s basic sound with the Gain control set to 12 o’clock. The first half showcases the distortion side on its own, with the boost kicking in for the second half. I used a Hamer USA Studio Custom with the bridge humbucker engaged. The clip was recorded direct off a Blackstar HT-1R’s speaker emulated output:

The Muse-inspired demo song shows you how the Fried Eye performs in a band mix. I used a Bluetone Shadows Jr. combo and a Shure SM57 to record all guitar tracks.

The demo features the following guitars:

• rhythm guitars – Hamer USA Studio Custom (left channel), Gibson Melody Maker SG (centre), Fender Stratocaster (right channel)

• reverse guitar – Gibson Melody Maker SG

• lead guitar – Hamer USA Studio Custom, Morley wah-wah

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The Bluetone Bugaboo Distortion pedal (249 €) is based on the company’s none-more-Metal Bugaboo valve amplifier’s crunch channel.

The Bugaboo is aimed more squarely at the Hard Rock- and Metal-crowd, offering much more gain and a lot more juicy compression than the Fried Eye pedal.

The wiring inside our review unit looks a bit less tidy, due to the long wires going from the circuit board to the pots and switches. I’d like to stress, though, that this specific pedal is a very early production model that has been superseded by a more compact version (but with completely identical specs and features) recently!

The Bugaboo-pedal, too, runs on nine to eighteen volts DC supplied by a PSU (not included) via a standard 2.1 mm plug (centre negative).

Bluetone’s Bugaboo does exactly what is says on the tin:

This pedal turns any amp into a fire breathing thing of beauty, offering plenty of gain. The three-band EQ has been bolstered by two very nifty mini-switches. Bite offers a presence boost that will help your guitar to cut through even the densest mix, while Tight helps you keep the bottom end from becoming too boomy.

This short audio clip gives you an idea of the Bugaboo’s basic sound with the Gain control set to 12 o’clock, Bite engaged and Tight turned off. I used a Hamer USA Studio Custom with the bridge humbucker engaged. The clip was recorded direct off a Blackstar HT-1R’s speaker emulated output:

The demo song shows you how the Bugaboo performs in a band mix. All guitar tracks were recorded direct off a Blackstar HT-1R’s speaker emulated output. The song contains the following guitar tracks:

• Rhythm guitars – Fender Stratocaster (left) & Gibson Melody Maker SG (right)

• Lead guitar – Hamer USA Studio Custom

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In my view, the clean, business-like look of the new Bluetone-pedals is a clear bonus, especially on stage. Sure, the Fried Eye and Bugaboo don’t sport any flashy paint jobs that scream ”Hey, man, I’m a weird boutique pedal”, but at least you can tell instantly what type of pedal you’re dealing with, and which knob (or switch) does what.

In terms of their sounds both units are winners, each offering a wide array of different shades of distortion, with the Fried Eye being a bit more ”Rock” and the Bugaboo a tad more ”Metal” in character. These are professional grade, handmade effect pedals at a fair price.Save

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Now on Soundcloud: Bluetone Fried Eye Distortion

Bluetone Fried Eye Distortion

• handcrafted in Finland

• distortion & boost

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Demo based on Muse’s song ”Supermassive Black Hole”

• rhythm guitars – Hamer USA Studio Custom (left channel), Gibson Melody Maker SG (centre), Fender Stratocaster (right channel)

• lead guitar – Hamer USA Studio Custom, Morley wah-wah

• reverse guitar – Gibson Melody Maker SG

• amp used – Bluetone Shadows Jr.

First Look: Valeton Dapper Mini

Valeton Dapper Mini

Four-in-one effects strip

• TUNER module with fast, accurate tuning
• Flexible DRIVE module offering OVERDRIVE or DISTORTION
• CHORUS module
• Analog-voiced DELAY module with tap tempo
• HEADPHONE output
• Power supply included

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Demo track based on ”Purple Rain” by Prince.
• Rhythm guitars – Fender Telecaster (left) and Stratocaster (right)
• Lead guitar – Fender Stratocaster
The Valeton Dapper Mini was plugged into a Juketone True Blood amplifier (handwired Tweed Champ clone). Recorded with a Shure SM57. Reverb added during mixdown.

Contact: R-JAM Group

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Review: Bluetone Shadows Reverb

For many guitarists the Vox AC30 is the greatest guitar amp ever made – bar none.

The combo was originally designed for the instrumental group The Shadows, but it became known worldwide as ”The Beatles Amp”. Over the decades, many other guitarists have favoured Vox’ best known design. Users include people like Brian May (Queen), Rory Gallagher and U2’s The Edge. Many Finnish Shadows-/Ventures-style bands (”rautalankka”) also favour the AC30.

Despite their legendary status, vintage Vox AC30s also do have their issues:

This large 2 x 12″ combo weighs quite a lot, making it a little hard to carry alone. Old Voxes also are non-master volume amps, which means that attaining natural distortion comes at the cost of serious sound pressure levels – often too much for small clubs and function gigs. Old AC30s also have all their valves – yes, also the power amp tubes – placed inside an almost completely closed metal chassis. This has led to vintage-Voxes getting an infamous reputation as relatively prone to catching fire.

vox-chassis-studiofreak-photobucket

(photo: Studiofreak/Photobucket)

Boutique amp makers Bluetone (from Helsinki, Finland) have recently come up with their special take on the beloved classic combo. Their new amp is called Bluetone Shadows Reverb, and it comes with a whole number of welcome improvements and modern features.

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bluetone-shadows-reverb-front-angle

Bluetone’s Shadows Reverb (reviewed version: 1,950 €) is a single-channel all-valve amp loaded with a genuine spring reverb. The combo represents the company’s view of what constitutes a perfect Top Boost-channel tone, all presented in a much more compact format.

The Shadows Reverb is a class AB amp, and it offers between 15 and 30 Watts of output power, depending on the setting of its built-in Variac.

bluetone-shadows-reverb-back-angle

The combo’s cabinet is made from high-grade plywood. The Shadows Reverb is a good deal smaller and less deep than its classic forebear from the 1960s.

bluetone-shadows-reverb-speakers

This reduction in heft is due mostly to the use of 10-inch Celestion Alnico Gold speakers in place of the AC30’s 12-inch speaker pair.

The speakers in the Shadows Reverb combo have been ”played in” for a number of hours (using an oscillator) to get rid of the typical tightness of brand-new Alnico Golds.

bluetone-shadows-reverb-power-amp-valves

This Bluetone-combo uses three 12AX7-tubes, and a single 12AT7 in its preamp section.

bluetone-shadows-reverb-premp-valves-transformers

The power amp runs on a quartet of EL84 valves. The Shadows Reverb is a cathode-biased valve amp, which means that replacing the power amp tubes doesn’t usually necessitate any rebiasing.

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bluetone-shadows-reverb-front-panel

Yes, the Bluetone Shadows Reverb is ”just” a single-channel combo, but it is far from a single sound guitar amplifier. In large part this is thanks to the brilliant modern features Bluetone has incorporated into this homage.

The Shadows Reverb offers you two guitar inputs – High and Low – for use with single coil- and humbucker-equipped instruments.

The preamp features a two-band Baxandall EQ-section – with typically interactive controls for Bass and Treble – as well as a three-stage Bass Cut rotary switch, which offers you two fatter alternatives to the famously bright and wiry Vox Top Boost sound.

The onboard spring reverb sounds fantastic and is a real treat to work with, giving you everything from completely dry tones to Surf Music antics.

The power amp section comes with three controls:

Cut allows you to make overall adjustments to the combo’s treble output.

Bluetone’s Master Volume-control is placed after the phase inverter, right at the end of the signal chain. This allows you to get juicy power amp distortion at low volume levels, and with only minimal changes in the amp’s tone.

As mentioned before, the Shadows Reverb comes with a built-in Variac circuit. Although the Variac also has a bearing on the combo’s output level, it works in a completely different way to the master volume, namely by dropping the voltage the power amp runs on. Turning the Variac down will result in a good deal less clean headroom and more power amp sag.

Due to large public interest, I had to return the Shadows Reverb much earlier than anticipated, but I still managed to record two different demo tracks with the Bluetone amp.

The first (clean) track features rhythm guitar tracks played on a Fender Telecaster (left channel) and a 1970s Japanese copy of a Gibson ES-335 (Kasuga; right channel). The lead guitar part was played on a Fender Stratocaster. All guitar tracks have been recorded with an AKG C3000 microphone placed approximately 80 cm from the combo’s front:

The second track (overdriven) has been recorded with a Stratocaster. The distortion comes from the Shadows Reverb (no pedals used), and all tracks have been close-miked with a pair of Shure SM57s:

bluetone-shadows-reverb-master-section

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Bluetone’s Shadows Reverb is an outstanding boutique amp take on the Vox AC30 motif. Like all other Bluetone amps, the Shadows Reverb is carefully handmade in Finland to the company’s strict quality standards. This results in reliable top-drawer tools for the musician, with extremely low levels of hiss and negligible AC hum.

I had a great time test driving this combo. The Bluetone Shadows Reverb simply delivers all it promises with style and panache. The combo weighs approximately half of the original classic (AC30s usually weigh between 31 to 36 kg, depending on their specific vintage and the speakers they come loaded with). The reduced size means you won’t be having any problems lifting this beauty into the boot of a small car, such as a Ford Fiesta.

Thanks to the additional features of this Bluetone combo – like the Bass Cut and the Variac – you will be able to enjoy the great sound of the Shadows Reverb anywhere you want, be it at home or on stage.

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Bluetone Shadows Reverb

Prices starting at approx. 1,700 € (reviewed version: 1,950 €)

Manufacturer: Bluetone Amps

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Pros:

+ handmade in Finland

+ size

+ weight

+ valve-powered spring reverb

+ Variac- and Master Volume-controls

+ sound

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Testipenkissä: Bluetone Shadows Reverb

Monelle kitaristille Voxin AC30-kombo on se yksi ja ainoa varteenotettava kitaravahvistin.

Alun perin brittiyhtye The Shadowsia varten kehitetty AC30 tuli kuuluisaksi The Beatles -vahvistimena, mutta se on löytänyt tiensä monien erityylisten kitaristien backlineen. Tunnetuimpiin käyttäjiin kuuluvat mm. Brian May (Queen), Rory Gallagher sekä U2:n The Edge. Myös Suomen rautalankabändien keskuudessa AC30 kuuluu vakiovarustukseen.

Suosiosta huolimatta vanhoilla AC30-komboilla on myös huonot puolensa:

Isokokoinen, kahdella 12-tuumaisella kaiuttimella varustettu putkikombo on melko painava ilmestys. Vanhoissa Voxeissa ei myöskään ole master volume -säädintä, mikä tarkoittaa sitä että vahvistimen omaa säröä pystyy hyödyntämään asianmukaisesti vain isoissa keikkapaikoissa. Lisäksi vintage-Voxeissa kaikki putket – kyllä, myös pääteputket – on sijoitettu lähes kokonaan suljettuun metallikoteloon, minkä takia vintage-AC30:t voivat (käyttötavasta rippuen) syttyä palamaan herkemmin kuin moni muu vanha kombovahvistin.

vox-chassis-studiofreak-photobucket

(kuva: Studiofreak/Photobucket)

Helsinkiläinen vahvistinpaja Bluetone tarjoaa nyt oivan ratkaisun klassikkovahvistimen ongelmiin Bluetone Shadows Reverb -nimisen putkikombon muodossa.

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bluetone-shadows-reverb-front-angle

Bluetone Shadows Reverb (testattu versio: 1.950 €) on yksikanavainen, jousikaiulla varustettu täysputkikombo, joka lupaa aitoa Top Boost -soundia selvästi pienemmässä paketissa ja nykyaikaisilla ominaisuuksilla höystettynä.

Shadows Reverb on AB-luokan vahvistin, joka tarjoaa 15-30 wattia tehoa, riippuen Variac-säätimen asennosta.

bluetone-shadows-reverb-back-angle

Shadows Reverbin kaiutinkotelo tehdään vanerista, ja se on selvästi pienempi ja litteämpi kuin 1960-luvun esikuvansa.

bluetone-shadows-reverb-speakers

Pienempi koko on osittain mahdollistettu käyttämällä klassikkokombon 12-tuumaisten kaiuttimien sijaan 10-tuumaisia Celestion Alnico Gold -kaiuttimia.

Shadows Reverbin kaiuttimia on, siniaaltogeneraattoria käyttäen, ajettu sisään useamman tunnin ajan, minkä ansiosta on saatu vähennettyä uusille Alnico Gold -elementeille tyypillistä alkukireyttä.

bluetone-shadows-reverb-power-amp-valves

Tässä Bluetonessa käytetään etuasteessa kolmea 12AX7-putkea, sekä yhtä 12AT7:ää.

bluetone-shadows-reverb-premp-valves-transformers

Päätevahvistin tuottaa tehonsa neljän EL84-putken voimalla. Shadows Reverb on katodibiasoitu kombo, mikä tarkoittaa sitä, ettei pääteputkia yleensä tarvitse biasoida vaihdon yhteydessä.

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bluetone-shadows-reverb-front-panel

Vaikka Bluetone Shadows Reverb on ”vain” yksikanavainen kombo, sen soundimaailma on selvästi laajempi kuin uskoisi. Kiitos siitä kuuluu Bluetonen monipuolisille ominaisuuksille.

Shadows Reverb tarjoaa kaksi kitaratuloa – High ja Low – single coil- ja humbucker-mikrofoneja varten.

Etuasteesta löytyy kaksikaistainen Baxandall-EQ – interaktiivisilla basso- ja diskanttisäädöillä – sekä kolmiasentoinen Bass Cut -bassoleikkuri, joka tarjoaa aidon Vox Top Boost -soundin lisäksi kaksi hieman muhkeampaa vaihtoehtoa.

Reverb-säätimellä hallitaan kombon putkivahvistettua jousikaikua. Kaiun soundi on erinomainen, ja säätimen skaala yltää täysin kuivasta kaikuisaan Surf-vatkaukseen.

Päätevahvistimelle on varattu jopa kolme säädintä:

Cut-säätimellä voidaan säännöstellä kombon kokonaisdiskanttia.

Bluetonen Master Volume -säädin on signaaliketjun loppupäässä (vaihekääntäjän jälkeen), ja sen ansiosta voidaan tuottaa päätesäröä myös pienillä volyymeillä.

Shadows Reverbissä on myös kolmiasentoinen Variac-tehonsäädin. Variac toimii eri tavalla kuin perinteinen master volume -säädin, se nimittäin muuttaa pääteasteen sisäistä jännitettä. Tehoa laskettaessa päätevahvistimen puhdas headroom ja putkikompressio muuttuvat.

Testikombon palautuksen suhteen tuli ylättäen hieman kiire, mutta ehdin kuitenkin äänittää kaksi erilaista demobiisiä Bluetone Shadows Reverbillä.

Ensimmäisessä kappaleessa komppikitarat soitettiin Fender Telecasterilla (vasen kanava) ja vanhalla japanilaisella puoliakustisella (Kasuga, oikea kanava). Soolokitarana toimi Fender Stratocaster:

Toisessa biisissä särösoundi tulee pelkästään kombosta itse. Kaikki raidat on soitettu Stratolla:

bluetone-shadows-reverb-master-section

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Bluetone Shadows Reverb -kombo on erinomainen boutique-luokan muunnelma Vox AC30 -teemasta. Kuten muutkin Bluetone-vahvistimet, Shadows Reverb rakennetaan kokonaan käsin Suomessa tiukkojen laatustandardien mukaan, mistä kielivät mm. kombon erittäin alhainen kohinataso, sekä käytännössä olematon verkkohumina. Vahvistimen laatuun suhteutettuna pidän Shadows Reverbin hintaa erittäin reiluna.

Testikokemuksen perusteella voin vain todeta, että Bluetone Shadows Reverb lunastaa lupauksensa avokätisesti ja tyylikkäästi. Bluetone-kombo painaa lähes tarkalleen puolet vanhan klassikon painosta (AC30 painaa noin 31-36 kg, vuosimallista ja kaiutinvarustuksesta riippuen), ja sen pienempi koko tarkoittaa, että Shadows Reverb mahtuu helposti esimerkiksi Ford Fiestan takakonttiin (kokeiltu on).

Bluetonen lisäominaisuuksien – kuten bassoleikkurin ja Variacin – ansiosta Shadows Reverbin tarjoama soundikattaus on yllättävän laaja, ja kombon erinomaisista soundeista voi nauttia sekä omassa olohuoneessa että keikkalavalla.

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Bluetone Shadows Reverb

Hinnat alk. 1.700 € (testattu version 1.950)

Valmistaja: Bluetone Amps

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Plussat:

+ käsintehty Suomessa

+ koko

+ paino

+ jousikaiku

+ Variac ja Master Volume

+ soundi

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