Review: Three Solid Mahogany Soprano Ukuleles – Flight MUS-2 + Ohana SK-38 + Sigma SUM-2S

The ukes have been recorded with a Citronic RM-06 ribbon microphone plugged into a Cranborne Audion Camden EC2 preamp. All EQ-settings were kept identical between the three models.

Alkuperäinen suomenkielinen juttu on ilmestynyt Rockway-blogissa.

Vintage C. F. Martin Style 2 soprano uke

Most of us will have started learning to play the uke with an affordable instrument, whose soundbox is probably made – at least in part – from laminated wood. Over time our playing will have improved, making us feel that it was maybe time to step up to a higher quality uke, which in most cases will mean an all-solid instrument.

If you’re interested in the history of this diminutive instrument you will have noticed that C. F. Martin & Co is a legendary maker of ukuleles. Even though Martin is a company based in Pennsylvania, they have started crafting ukes during the ukulele boom of the 1910s already. Not content making mere copies of Hawaiian instruments Martin almost singlehandedly developed the ukulele further, raising the benchmark for how a great uke should look and sound in the process. Martin also sold bucketloads of the little instruments – their ”economy model” alone, the Martin Style 0, sold almost 90,000 units between 1922 and 1994, when the original production run ended (temporarily).

The Martin Company originally introduced three soprano models in 1915, named Style 1, Style 2 and Style 3. The higher the Style’s number the more intricate the cosmetic features, like bindings and rosettes, would be.

My personal favourite is the dark brown all-mahogany Style 2, which is why I’ve chosen three all-solid Style 2-copies for this review.

A word about friction tuners

Most ukuleles these days are made with geared guitar tuners, which make tuning relatively easy for beginners. This is due to the so-called gear ratio, meaning the number of turns on a machine head’s knob relating to a full turn of the actual tuner post. This is normally somewhere between 14:1 and 18:1, meaning 14 or 18 turns of the knob shaft will give you one full turn of the tuner’s post.

Friction pegs aka patent tuners

Originally, all ukuleles came with simple wooden friction pegs that kept the strings in tune by simple friction between the hole in the headstock (aka peg head) and the wooden peg. This is exactly the same type of system that’s still in use on violins or cellos.

In 1920 Martin started introducing new-fangled friction pegs – first on more expensive models, but then across their whole uke range – which offered a much smoother tuning action. Friction tuners contain no gears, meaning their ”gear” ratio is 1:1 (like on a wooden peg), but here the friction is caused by metal washers, or plastic washers, or metal springs, that are forced against the front and back surfaces of the headstock. Their ”action” or stiffness can be adjusted with the screw at the top of the tuning button.

I would never recommend giving a beginner an instrument with patent pegs, because learning to tune your uke properly is hard enough in the beginning. But there is no reason to be afraid of friction pegs, either, once you know the basics of tuning your instrument. Just keep in mind that very little goes a long way with patent pegs, when it comes to hitting the correct pitch. You should also keep the right screwdriver handy for quick adjustments of the pegs’ stiffness, which can shift between summer and winter, due to the headstock wood expanding and contracting according to the relative humidity.

Nowadays friction tuners are mostly found on vintage-style ukuleles, like on the three instruments reviewed here.


Flight MUS-2

Flight is a Chinese brand concentrating mostly on ukuleles.

The Flight MUS-2 (current price in Finland: 199 €; incl. gig bag) is their version of a Martin Style 2 soprano ukulele. This is a beautiful instrument that invokes its vintage mojo with the help of a matte open-pore finish over a rich brown wood stain.

Flight’s own additions to the recipe include wooden body binding – instead of the celluloid plastic used on the original – as well as a cream rosette around the soundhole.

The Flight MUS-2’s neck is solid mahogany, too, but made of three parts, with the neck heel and the upper half of the peg head glued to the neck’s long main part. This way of doing things is both more economic and better for the environment than carving the neck out of a much larger wooden blank.

The Flight’s fretboard and bridge have been made from walnut, while the top nut and the bridge saddle are genuine bone.

The MUS-2 uses a set of Gotoh friction pegs, which employ plastic knobs, silicone washers and metal sleeves to build up the necessary friction for keeping the strings under tension.

Neck width at the saddle is 34 mm, which is the de facto standard for most modern soprano ukuleles, even though this is two to three millimetres narrower than on most vintage ukes. The MUS-2 has a scale length of 34.9 cm, which is three millimetres longer than on a Martin soprano.

The MUS-2 has a nicely rounded D neck profile.

The workmanship on the Flight is on a really high level. My only, tiny bit of criticism points to the matte finish which is something of a fingerprint magnet on the test sample.

The MUS-2’s string action is modern and low. I measured 2.4 mm at the 12th fret for the g-string and 2.1 mm for the a-string. The action and the nicely rounded neck make for a very comfortable playing feel. Despite the low action, the Flight offers a very good dynamic range without any string rattles.

The Flight MUS-2 has a surprisingly big and full-bodied voice that projects very well, both to the player and to his (or her) audience.


Ohana SK-38

Ohana is brand situated in the US, but with most of its production in China. Ohana is the Hawaiian word for ”family”.

Ohana’s 38 Series comprises of all-solid Style 2-copies in different body sizes, with the Ohana SK-38 (current price in Finland: 348 €) being the soprano model.

Cosmetically the SK-38 probably comes closest to the spirit of a vintage Martin Style 2, except for the slightly larger-than-vintage soundhole (about 2 mm more in diameter) and the position markers copied off a Style 1 instrument. Our test sample was a tiny bit heavier than the Flight ukulele, but still super-light compared to most string instruments.

In terms of colour and finishing the Ohana SK-38 is almost identical to the Flight, with the finish seeming even thinner here. Visually the SK-38 evokes the pre-1926 Martins that sported a brushed on cellulose-based finish. In 1926 Martin phased in spray finishes to speed up production.

The soundbox’ top sports three-ply plastic binding (b/w/b), while the back is single-ply. The vintage-type rosette is made up of alternating thin black and white rings.

The Ohana SK-38 sports a modern solid-mahogany neck with separate parts for the neck heel and the headstock’s top half. The Gotoh patent pegs are the same model found on the Flight, too.

The fretboard and bridge have been carved from ovangkol. The top nut and bridge saddle are both bovine bone.

Neck with at the nut is 34 mm on the SK-38, while the scale length is 34.9 cm.

I would call the Ohana SK-38’s neck profile a slightly flatted C-profile, which comes close in feel to modern Martin soprano uke necks. In terms of playing comfort there’s not much to divide the three reviewed sopranos.

The SK-38 displays a very high level of workmanship; I own an older version of this uke – one that sports a nut and bridge saddle carved from ebony – and I must say the build quality on the new version has clearly improved.

The very low string action on the test sample is a good indicator of the quality of the fretting. I measured 1.3 mm for the g-string and 1.4 mm for the a-string at the 12th fret. Despite this low action I experienced no problems whatsoever with fret rattle.

The Ohana SK-38 has a very balanced voice with a tiny bit less bottom end and a tad more sparkle, when compared to the Flight. The Ohana projects very well.


Sigma SUM-2S

Originally, Sigma Guitars was C. F. Martin’s far-eastern brand, founded to combat the ever-increasing flow of Japanese Martin-copies in 1970. In 2007 Martin sold the brand to German company AMI GmbH, who has done quite a lot to raise the brand’s profile. Apart from copies of Martin guitars Sigma’s model range now also includes several Gibson-style acoustic guitars. Sadly, Sigma’s ukulele range has been discontinued at the start of 2022, meaning that the current stock of Sigma ukes in shops now will be the last, at least for the foreseeable future.

The Sigma SUM-2S (current price in Finland: 315 €; incl. gig bag) looks a bit more refined than the other two instruments in this review, due to its flat matte finish. The finish is very thin, but has been buffed to a flat matte sheen.

The SUM-2S is in the same weight class as the Ohana SK-38.

Anoraks would say that the Sigma SUM-2S is more of a ”Style 2.5” soprano, because it comes with the longer fretboard – offering 17 instead of 12 frets – of a Style 3 (and Style 5) uke.

In some respects, though, the SUM-2S comes closer to vintage Martin specifications than the other two contenders in this review:

Arguably the most important point here is the one-piece mahogany neck, which is a genuine rarity in this price range. Other features include a 36 mm wide neck at the nut, a smaller soundhole, the vintage-correct size and spacing of the position markers, as well as the original (shorter) Martin-scale of 34.6 cm.

The fretboard and the bridge have been made out of Indian rosewood, while the top nut and bridge saddle are genuine bone.

The Sigma SUM-2S uses Chinese Ping friction pegs, which produces the require friction by pressing the plastic tuner knobs into fat plastic washers. These pegs have been in for some criticism in a number of reviews, but to be fair, I haven’t had any tuning problems with the Ping pegs over the whole duration of testing the Sigma uke.

The neck profile on the Sigma SUM-2S is fatter than on the Ohana, but flatter than on the Flight, combining the best aspects of the two necks.

Even though the difference in neck width at the nut is only two millimetres, the Sigma’s neck feels roomier. This can make a huge difference in feel for people with large (or thick) fingers!

The Sigma’s set-up is very comfortable. I’ve measured an action of 2.1 mm for the g-string and 1.8 mm for the a-string at the 12th fret. The fretwork is excellent, meaning I’ve experienced no string rattles.

Like the other two instruments in this review the Sigma, too, came with Aquila Nylgut strings. Due to the slightly shorter scale length the strings feel maybe a little bit too slinky. I’d recommend trying fluorocarbon strings on the SUM-2S, which generally tend to feel a bit stiffer.

At first I thought the Sigma was quieter than the other two ukes, when in fact it even offers more of a vintage-style ”bark” for the audience (or a microphone). The smaller soundhole simply makes this ukulele project slightly less in the direction of the player himself (or herself). In terms of its sound the Sigma SUM-2S is the brightest sounding of the three reviewed models.

Testipenkissä: Bluetone Black Prince Reverb – vuoden 2021 päivitetty versio

Testasin Bluetone Black Prince Reverb -komboa ensimmäistä kertaa vuonna 2016 ja tykkäsin siitä kovasti. Paljon on kuitenkin tapahtunut tämän jälkeen, ja tänä vuonna Bluetone on yhdistänyt kaikki Black Princen halutuimmat custom optiot ja laittanut ne uuteen ja parannettuun 2021 -versioon, joka korvaa edeltäjänsä.

Ensimmäiseksi huomataan varmaan kaikki kosmetiset seikat. Vanhalla versiolla oli hyvin siisti ja asiallinen ulkonäkö. Uuden version myötä Bluetone on viennyt suosikkimallinsa ulkonäköä kuitenkin selkeästi Boutique-vahvistimien piiriin – Fender-tyylisessä kombossa on nyt western-tyylinen keinonahkapäällystys, etupaneeli ja säätimien nupit ovat Blackface-tyylisiä, ja vahvistimen etukangas muistuttaa väriltään vehnän oljet.

Ratkaisevat päivitykset on tehty kuitenkin Black Prince Reverbin elektroniseen varustukseen.

Tämän putkikombon sähköinen rakenne perustuu edelleen löyhästi Fenderin klassiseen Blackface Princetoniin – gain-rakenteen, tremolon ja jousikaiun suhteessa – mutta uutena ominaisuutena on lisätty jalkakytkimellä toimiva Solo-boostaus.

Kenties tärkein parannus Black Princen uudessa versiossa on uusi, isompi kaiutin. Vanhassa mallissa oli mukana Princeton-tyylisesti 10 tuuman elementti. Nykyiseen vahvistimeen voi valita yhden kahdesta 12-tuumaisista vaihtoehdoista – joko Celestionin G12 Neo Creamback -kaiutin (niin kuin testikoneessa) tai Warehouse Guitar Speakersin malli G-12 C/S. Isomman kaiuttimen vuoksi nykyversiossa on entistä isompi kotelo, joka on lähellä Blackface Deluxen kokoluokkaa.

Bluetonen Harry Knecktin mukaan myös jousikaiun (ja sen vahvistuspiirin) tarkkaa rakennetta on parannettu entisestä, minkä ansiosta kaiku soi paremmin ja sen omakohina on selkeästi vähennetty. Black Princen lyhyt jousitankki tulee Accutronicsin mallistosta.

Tämän Bluetone-vahvistimen etuvahvistin on rakennettu kolme 12AX7-putkia käyttäen, kun taas päätevahvistin käyttää kaksi putkia.

Päätevahvistin tarjoaa maksimaalista soundillista monipuolisuuta, sillä sen rakenne mahdollistaa käytännössä kaikien oktaaliputkien käyttöä. Päätevahvistimeen voi laitta 6V6GT-, 6L6GC-, 5881-, EL34-, KT66- ja KT77-putkipareja ilman tarvetta biasointiin!

Parilla 6V6GT-putkilla Black Prince Reverb -kombosta lähtee ääntä noin 15 watin voimalla, kun taas kahdesta 6L6GC-putkista (niin kuin testikoneessa) tai EL34:stä vahvistimen teho nousee noin 28-30 wattiin.

Vaikka kombo ei vaadi uudelleenbiasointia, on hyvinkin tärkeä laittaa pääteputkien ja toroidisen muuntajan välistä pikkukytkintä oikeaan asentoon (katso käyttöohjetta), muuten pääteputket (tai jopa sisäiset kompponentit) voivat pahimmassa tapauksessa hajota liian suurten sähkövirtojen takia.

Takapaneelista löytyy kolme kaiutinlähtöä, sekä DIN-mukainen liitin pakettiin kuuluvaa jalkakytkinyksikköä varten.


Näitä klippejä on äänitetty Fender Stratocaster -kitaralla ja Shure SM57 -mikrofonilla.

Ensimmäinen seikka jota huomataan, kun laittaa uuden Bluetone Black Prince Reverb -vahvistimen päälle, on miten hiljaa se on tyhjäkäynnissä. Brummin tai kohinan määrä on pitkälti riippuvainen laadukkaista komponenteista ja osien fyysisesta sijoittelusta, esimerkiksi päämuuntajaan nähden. On selvää, että Bluetonen väki tietää mitä se tekee.

Koska Black Prince ei yritä olla tarkka Princeton-klooni, Bluetonen kombo voi tarjota laajemman soundivalikoiman kuin vanha Fenderin klassikko. Tässä tarjotaan kaikkea mikä on hyvä Blackface-kombojen soundissa, ilman klassikkovahvistimien huonoja puolia, niin kuin esimerkiksi välillä löysästi soivia Jensen-kaiuttimia tai – Princetonin tapauksessa – EQ:sta puuttuvaa keskialuen säädin ja alkuperäinen pieni kaiutin.

Sooloboosteri on erittäin tervetullut uudistus, kun taas Bluetonen Master Volume -säätimen ansiosta saa omat lempisoundit tarvittaessa esille myös hiljaisella volyymillä.

Päätevahvistimen monipuolisuus mahdollistaa myös erilaisia hybridisoundeja, yhdistämällä kombon Fender-tyylisen etuvahvistimen myös britti-tyyliseen päätevahvistimeen (EL34), perinteisten 6V6GT- ja 6L6GC-parivaljakkojen sijaan.

Black Princen tremolo on suorastaan herkullinen, ja se tarjoaariittävästi säätövaraa sekä efektin nopeudessa että sen syvyydessä. Itse tykkään erittäin paljon myös kombon päivitetystä jousikaiusta, koska se kuulostaa kermaiselta ja sillä on aitoa syvyyttä. Jotkut rautalankka-kitaristit voisivat ehkä toivoa vielä enemmän kaiun ”roisketta”, mutta se on selvästi makuasia…

Demobiisin kitararaidat on äänitetty nauhamikrofonilla. Soolokitarana toimii Hamer USA Studio Custom -kitara, kun taas komppiosuudet on soitettu Gibson Les Paul Juniorilla (vasen kanava) ja Fender ’62 Telecaster Custom -uusintapainoksella (oikea kanava).


Bluetonen vuoden 2021 Black Prince Reverb -painos on huippuluokan versio Blackface-aikakauden täysputkikombosta, höystettynä erilaisilla päivityksillä ja nykyaikaisilla parannuksilla. Tästä kombosta on käytännössä mahdotonta saada huonoa soundia.

Niin kuin kaikki Bluetone-tuotteet, myös Black Prince Reverbiä tehdään käsityönä Suomessa. Tästä huolimatta tämä kombo on jopa edullisempi kuin Fenderin oma tämänhetkinen ’64 Princeton -uusintapainos.

Ei ole siis ihme, että Bluetone Black Prince Reverb on ollut jo jonkun aikaa firman eniten myyty vahvistin. Itse asiassa uuden Black Princen soundi oli niin hyvä, että testikombosta tuli – Bluetone Shadows Jr. -kombon lisäksi – Kitarablogin referenssivahvistin.


Bluetone Black Prince Reverb

• Hinnat alkaen 1.450 €

Review: Bluetone Black Prince Reverb – the 2021 Update

I first reviewed the Bluetone Black Prince Reverb in 2016, and I really liked it. A lot has happened since then, though, and this year Bluetone has bundled all of the most requested custom updates of the Black Prince and put them into a new and improved 2021 version (prices starting from 1,450 €) that supersedes the previous issue.

The first things you’ll notice are the cosmetic features; the old version of the Black Prince Reverb was a very clean looking combo with a very business-like appearance. The new version takes the amp’s look clearly into boutique Blackface territory with its Fender-style cabinet, its Country and Western tolex, its faceplate and control knobs, and with the wheat-coloured speaker grille.

But the improvements go much deeper in the Black Prince than mere cosmetics.

The preamp section’s architecture regarding the combo’s gain structure, spring reverb and tremolo effect are still loosely based on Fender’s classic Blackface Princeton, but Bluetone now adds a footswitch operated Solo-boost circuit to the proceedings.

In terms of the amp’s sound the most important update is the choice of a larger speaker. The older model followed the Princeton by using a 10-inch speaker. The current model has been updated with a choice of two 12-inch speakers – either a Celestion G12 Neo Creamback (as reviewed) or a WGS G-12 C/S. To accommodate the larger speaker the Black Prince Reverb’s cabinet has been enlargened to a size similar to a Fender Blackface Deluxe.

As Bluetone’s Harry Kneckt told me, the Black Prince’s genuine spring reverb’s circuit has been further improved for a fuller sound with even less hiss. The short reverb tank is an Accutronics model.

The Bluetone’s preamp runs three 12AX7 valves, while the power amp is handled by a pair of tubes.

The power amp has been designed with tonal flexibility in mind, by accepting all regular octal power tubes like 6V6GT, 6L6GC, 5881, EL34, KT66 and KT77 models without re-biasing.

With a pair of 6V6GTs the Black Prince Reverb will give you approximately 15 watts of power, while a pair of 6L6GCs (as supplied) or EL34s raises the output to 28-30 watts.

Even though re-biasing isn’t necessary, you have to make sure that the mini-switch between the second power tube and the toroidal transformer is set correctly to ensure the amp works properly, and to avoid possible component failure!

The back panel sports three speaker outputs, as well as the five-pin DIN-connector for the combo’s three-button footswitch unit (supplied with the amp).


These clips have been recorded with a Fender Stratocaster and a Shure SM57.

In terms of its sound, the first thing you’ll notice about the Bluetone Black Prince Reverb is how quiet it is when it comes to hum and hiss. Unwanted noise in an all-valve amplifier has a lot to do with the physical layout of the components, and Bluetone’s team clearly know what they’re doing.

The Black Prince’s sound offers a wider scope than a straight Princeton-clone (which it isn’t). There’s all of the original Blackface-era goodness without any of the drawbacks, like the sometimes flabby Jensen speakers, and – in the case of old Princetons – the missing mid-range EQ and smaller speaker.

The solo boost is a great new feature, and the Master Volume control makes sure that you can dial in your tone at the volume level you need.

Being able to step outside the typically Fender-ish 6V6GT- and 6L6GC-realm in the power amp section allows you to experiment with hybrid tonalities, like a Blackface with a British accent.

The tremolo sounds great and it offers enough scope in terms of speed and depth. I like the spring reverb very much, because it sounds creamy and full. Some will like even ”wetter” and ”sploshier” reverb types, but you can’t please everyone…

The demo’s guitar tracks have been recorded with a ribbon mic. The lead guitar is a Hamer USA Studio Custom, while the rhythm guitar tracks are played on a Gibson Les Paul Junior (left channel) and a Fender ’62 Telecaster Custom reissue (right).


Bluetone’s 2021 version of its Black Prince Reverb is a high-end version of what people love about Blackface-era amps combined with a number of sensible updates and improvements.

The Bluetone Black Prince Reverb is a handwired and handcrafted all-tube combo, made here in Finland. In light of this you can only call the price tag very fair, coming in several hundreds of euros lower than Fender’s current handwired ’64 Princeton Reissue.

No wonder that the Black Prince has been Bluetone’s best selling model for quite some time now. In fact, I liked the combo so much that the review sample has now joined my Bluetone Shadows Jr. as Kitarablogi’s reference amp.


Bluetone Black Prince Reverb

• Prices start at 1,450 euros

Bluetone Black Prince Reverb (2021) – demobiisi – demo song

All guitar tracks recorded with a ribbon microphone.

• Lead guitar – Hamer USA Studio Custom

• Rhythm guitars – Gibson Les Paul Junior (left channel) & Fender ’62 Telecaster Custom Reissue (right)

Bluetone Black Prince Reverb

• Inspired by a Fender Blackface Princeton

• Controls for Volume, Treble, Middle, Bass, Reverb, Tremolo Speed, Tremolo Depth, Solo Boost, Master Volume

• Power amp comes with a pair of 6V6GTs (14-15 W); can run on other octal tubes also, like a pair of EL34s (28-30 W)

• Genuine spring reverb (switchable)

• Bias-modulated tremolo (switchable)

• Solo Boost (switchable)

• 12-inch Celestion Neo Creamback (other options available)

• Three-switch footswitch unit included

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