Review: Hehku Custom Nightingale 15

Hehku Nightingale 15 – opener

From a guitarist’s standpoint, Finland truly is the land where milk and honey flow. In relation to its tiny population Finland is home to an unbelievable number of first-rate guitar-, effects- and amp-makers.

One such boutique-level amp brand is Hehku Customs from the town of Pori (on the western coast). Hehku’s team consists of chief designer Jarmo Välimäki, as well as Markku Penttilä and Juha Heljakka, who are in charge of R & D, sales and marketing.

There are several examples of different custom amps the company has built on Hehku’s website. Prices for custom amps start at about roughly 1,300 €. Hehku Custom’s cabinet sizes and shapes are standardised, but all other details can be tailoured to each customers wishes and requirements. ”The basic idea is that we want to make our customers’ wildest dreams come true!” says Jarmo Välimäki.


Hehku Nightingale 15 – full front

Kitarablogi got a 15-watt Hehku Nightingale 15 combo for testing. This is Hehku Custom’s first standardised model without custom options.

The Nightingale 15 (combo approx.: 1,950 €, head approx.: 1,750 €) is a hand-made, all-valve combo with a single 12-inch speaker, and represents many features typical of Hehku’s design philosophy.

The Nightingale’s cool and original looks make it clear from the off that this combo isn’t your typical Fender Tweed clone.

Hehku Nightingale 15 – full back

The Hehku Nightingale is an open-backed combo with easy valve access. All Hehku cabinets are made from Finnish birch ply, which is an outstanding material, both in terms of strength as well as sound.

Hehku Nightingale 15 – top handle

Birch ply is also relatively lightweight, which is why the Nightingale is easy to carry by its single top handle.

Hehku Nightingale 15

Hehku also offers professional transport cases to go with their amps and cabinets. A road case for the Nightingale 15 would set you back around 260 €.


Hehku Nightingale 15 – full control panel

Hehku’s Nightingale 15 is a very special case for a two channel combo, because its signal path is in series the whole way through.

Most vintage (-style) amps have two discrete channels with separate controls and functions (like ”Normal” and ”Tremolo”), and no channel switching capabilities. Modern amps, on the other hand, may share a single EQ section between two channels, but they offer channel switching, and separate gain and volume settings for each channel.

Hehku’s Nightingale takes its own, idiosyncratic path by offering two switchable channels in a cascading set-up. This means that the Clean channel’s triode and pentode gain settings, as well as this channels two-band EQ (six-position rotary Bass, active Treble), also influence the Drive channel’s tone and response.

Hehku Nightingale 15 – footswitch + valves

You can either use the control panel’s push/pull-switches or the compact footswitch unit (included with the amp) to select triode- and pentode-modes, and to switch from Clean to Drive.

Hehku Nightingale 15 – back panel

The Nightingale’s back panel sports a handy valve chart for easy orientation.

There’s also a triode/pentode switch for the power amp valves – switching to triode-mode the combo’s output power drops from fifteen to seven watts, and it also changes the amp’s tone somewhat.

Thanks to its four speaker outputs you will be able to connect the Nightingale to virtually any external guitar cabinet you can find.

Hehku Nightingale 15 – EF86 preamp valve

The clean channel is constructed around a EF86-type pentode. The EF86 (aka the 6267) is known for its great tone, and it can be found in some vintage Vox amps, as well as in Matchless and Dr Z amps. But due to its microphonic nature this tube type is not widely used.

Hehku Customs has solved this problem by using a damper made from silicone, which decouples the EF86 from the mechanical vibrations of the combo.

Hehku Nightingale 15 – preamp valves + switches

Overdrive (and phase inversion) duties are handled by a pair of 6N2P-valves, which are Russian, military-spec’ed relatives of the 12AX7/ECC83, offering a slightly different gain structure and sound.

Hehku Nightingale 15 – 5AR4 rectifier tube

The Nightingale uses a tube rectifier designed around a type 5AR4.

Hehku Nightingale 15 – power amp valves

The power amp section runs on a pair of EL84s. You could also drop in two Russian (military) 6P15P/EL83-types, and thanks to the fact that the Hehku Nightingale is self-biasing, you can do this without the need for an amp technician.

Hehku Nightingale 15 – Warehouse-speaker

A quality 12-inch speaker from Warehouse, the Green Beret, has been selected for its British sound.


With its factory set-up (6N2P + EL84), the Hehku Nightingale 15’s clean channels has plenty of headroom, even for twin humbucker guitars. The six-step Bass-rotary and the combo’s active Treble control offer you a lot of leeway to tune the tone to your requirements. Tonally, the Nightingale’s clean delivery is more ”Vox” than ”Blackface”.

The Nightingale’s overdriven tones are extremely tasty, too. There’s a very juicy mid-range, coupled with a healthy dose of top end grit, which will surely satisfy any fan of classic Rock and Blues sounds.

Here’s a clip recorded with my vintage-reissue Fender Telecaster – you will hear: clean (triode) –> clean (pentode) –> overdriven (triode) –> overdriven (pentode); the power amp runs in pentode-mode:

And here’s a similar clip played with my Hamer USA Studio Custom:

Hehku Nightingale 15 – full angle


Hehku’s Jarmo Välimäki also supplied me with a set of alternative valves (12AX7 + 6P15P), and the difference in tone and dynamics is easy to hear:

With the alternative set, there’s much less headroom on offer. Even the Telecaster will drive the clean channel into break-up (in pentode-mode), with the Hamer stepping clearly into Blues-overdrive territory.

These valves add more gain to the drive channel, and also result in a slightly flabbier bass and sharper treble. The Nightingale 15 sounds great this way, too, even though my own preferences lean more into the direction of the factory set-up.

Here’s a clip with the Telecaster (the control settings have stayed unchanged, only the valves have been swapped):

And here’s the sound of the amp played with the Hamer’s two humbuckers:

Hehku Nightingale 15 – reverse angle


Hehku Nightingale 15 – logo

In my view, the Hehku Customs Nightingale 15 is a fantastic all-valve combo with its own voice and an interestingly idiosyncratic overall concept. I like Hehku’s eye for detail, and the fact that the company go their own way in terms of looks and electronic design. The Nightingale is a top-drawer amp, offering its own distinctive looks and sounds, without the need to resort to snake oil or nostalgic tube voodoo.

Hehku’s Nightingale is a modern, hand-made valve combo, with a clear and easy-to-understand lay-out, as well as a very interesting and interactive signal path. The Nightingale is not about trying to imitate any specific vintage amp’s sounds – this amp is a true creative tool, setting you on your path to your personal guitar tone nirvana.

The Nightingale 15 sure isn’t cheap, but in light of the fact that this is a hand-made Finnish product, you can only call the price tag very fair!


Hehku Customs Nightingale 15

approximately 1.950 €

Contact: Hehku Custom



+ voluptious appearance

+ workmanship

+ hand-crafted

+ Made in Finland

+ idiosyncratic channel lay-out

+ sound

Review: Blackstar ID:Core 20 + 40


Blackstar IDCore 20 + 60 – opener

Earlier this year, Blackstar Amplification have released their new ID:Core series, which comprises three stereophonic practice amps (at the moment of writing).

Blackstar’s ID:Core combos are powered by the same modelling technology used in the company’s full-blown ID-series. The ID:Core amps simply take this technology to a smaller format.

Kitarablogi had the pleasure of testing the new series’ middle model – the ID:Core 20 (2 x 10 W) – as well as the largest member of the ID:Core family – the ID:Core 40 (2 x 20 W).


Blackstar ID_Core 20 – beauty 1

The Blackstar ID:Core 20  (current price in Finland: 149 €) comes equipped with a pair of five-inch speakers.

Blackstar ID_Core 40 – beauty 1

The larger Blackstar ID:Core 40 combo (current price in Finland: 195 €) uses two 6.5-inch speakers to get its message across.

Except for the differences in power amp-, cabinet- and speaker-sizes, the rest of the specifications are identical in these two guitar combos. To make this review more readable I will concentrate on the Blackstar ID:Core 40, and mention any possible differences found in the ID:Core 20.


The new Blackstar combo has a very handy size, and it is easy to carry. In addition to the carrying strap, you will find the power supply unit and a quick start guide in the shipping box. You can download the full owner’s manual as a PDF-file from Blackstar’s website or HERE.

Even though the ID:Core series, naturally, isn’t really built to withstand the rigours of touring, these combo’s are rather sturdy little numbers. These may be mere practice amps, but toys they are most definitely not!


The electronics have been installed into the ID:Core’s top.

All the controls, push-buttons and inputs/outputs are identical throughout the whole series, with the exception of the smallest combo (the ID:Core 10) not offering the option of connecting a FS-11 footswitch unit (not included).


The ID:Core 40’s factory default uses the FS-11’s left switch for switching between two Voice-channels, with the right switch functioning as an effect mute for the selected channel.

The free Blackstar Insider -software (PC and Mac) also lets you select a different footswitch mode that offers you all Voice-channels, and which uses the two switches to step through all the channels, either up (right switch) or down (left switch).


Blackstar ID_Core 40 – control panel

The ID:Core 40 is very easy to use:

The Voice-selector lets you choose one of the combo’s six Voice-channels (= digital amp models). In Preset-mode calling up a channel automatically recalls all the stored preset settings, like gain, ISF or effects. In Manual-mode switching to a different Voice only changes the selected amp type, with the other settings staying the way you have manually set them.

Naturally, all presets can be adjusted by the user, and the changes can then be stored in the ID:Core combo’s memory, wiping the factory preset in the process.

The new Blackstar-combos also come equipped with a digital tuner, which springs to life when you hold down the Manual- and Tap-buttons simultaneously for a couple of seconds. In Tuner-mode the combo’s red Voice-LEDs represent the six guitar strings, while the LEDs in the Effect-buttons tell you whether the pitch is flat (REV), sharp (MOD) or right on the money (DLY).

Blackstar Insider software

By downloading Blackstar’s Insider-software you get access to additional features of the ID:Core combo via its mini-USB-port (Hey, Blackstar: Why isn’t a USB-cable included with the amp?):

The most crucial of the additional functions, in terms of the combo’s tone, is the access to its internal three-band EQ. The combo only offers you a physical knob for the ISF-setting, which lets you change the amp’s character from bright-ish ”American” (ISF = 0) to chunkier ”British” (ISF = 10). The Insider-programme also lets you fine-tune each preset’s Bass, Middle and Treble EQ-settings.

Insider also allows you to create you own ID:Core-presets, save as many as you like, and send them to your combo for use. But note that each preset is always tied to the Voice-channel used as its basic ingredient. This means that an ID:Core combo will always offer six different Voice-channels – you cannot load six different Warm Clean patches, or six OD1 Metal sounds, into the combo’s six Voice-channels.

If you want, you can set up an Insider-account, which enables you to share your own patches with other ID:Core users around the globe.

The Blackstar Insider software also includes some tools for practicing. There’s a simple rhythm box, as well as a music player (looking like an old cassette recorder), which even allows you to change a music file’s tempo and/or loop a certain part.

Insider’s tuning section gives you an on-screen, graphically-enhanced version of the combo’s internal tuner.

Thanks to its USB-connectivity you can also use the ID:Core combos as an external sound-card for direct recording to your audio sequencer. You can even configure the combo for re-amping (using the Insider-software), but I wasn’t quite satisfied with the way the ID:Core performed as a sound-card (at least with the tested firmware version). I’d like to see an even shorter audio latency, as well as a hotter audio signal, before I would seriously consider using the ID:Core for direct recording.



Blackstar’s advertisements are placing quite a lot of emphasis on the ID:Core series’ Superwide Stereo function. With Superwide Stereo turned on (factory default, you can also switch it off via Insider) especially the delays and reverbs sound impressively lush. You feel enveloped in a cloud of sound, with some of it seeming to even come from behind you.

Actually, the ID:Core’s effects aren’t really stereophonic at all – you shouldn’t expect ping-pong delays, or anything of that sort. In reality, these Blackstar combos have a signal path that is completely monophonic, up to the point the signal reaches the power amp section (and headphone amp). It is only at this point that a stereo signal is created from the mono by splitting the mono signal in two, and by changing the phase of one of the signals. The result is a lush, broad, and fairly natural ”stereo” sound.

This method of creating ”fake stereo” has long been used in analogue modulation effects. There’s nothing ”wrong” or ”deceitful” in doing things this way, and Blackstar’s Superwide Stereo sure sounds impressive, but I’m not sure I’d want to trumpet this amp series’ ”stereo-ness” so loudly.

But now to the most important aspect of an amp – it’s tone:

I could sum it all up by saying that the amps sound great! Regardless of the fact that we’re talking about very pocket-friendly practice amps here, the sounds and dynamic response Blackstar’s excellent ID-modelling technology dishes out will leave you with a big grin on your face. Six well-chosen Voices and 12 quality effect types shouldn’t leave anybody wanting.

The ID:Core 40, naturally, sounds noticeably ”bigger”, compared to the ID:Core 20, with its smaller speakers and cabinet. Nonetheless, you get the feeling that both combos make the most of their respective wattage. Miked up both combos sound virtually the same.

The following sound clips have been recorded with the Blackstar ID:Core 40, using the factory presets as a basis, which I then fine-tuned to my liking. I played these clips on my Kasuga (a Japanese ES-335 copy from the Seventies), recording the sound with two dynamic Shure microphones.

Clean Warm:

Clean Bright:


Super Crunch:




Blackstar ID_Core 20 – beauty 2

Blackstar have successfully managed to transfer the great sounds of their ”grown-up” ID Series amps to the ID:Core practice combos. Together with Blackstar’s Insider-software, the ID:Core 20 and ID:Core 40 combos are fully-spec’ed and inspiring tools for practice, home recording, teaching and warm-up. You get genuine Blackstar tone in a handy package!

Blackstar ID_Core 40 – beauty 2


Blackstar ID:Core -kombot

ID:Core 20 – 149 €

ID:Core 40 – 195 €

Finnish distributor: Musamaailma



+ workmanship

+ versatile sound

+ up to three simultaneous effects

+ built-in USB sound-card

+ Blackstar Insider -compatible


– latency in USB-recording

Tule kokemaan taivaallisia kitaroita! The Holy Grail Guitar Show – Berliini, 15. & 16. marraskuuta 2014


The Holy Grail Guitar Show -näyttely antaa sinulle ainutkertaisen mahdollisuuden tutustua maailman parhaimpiin uusiin kitaroihin, sekä tekijöihin unelmasoittimien takana!

The Holy Grail Guitar Show:n takana on eurooppalaisten kitararakentajien yhdistys The European Guitar Builders. Tapahtuma järjestetään Berliinissä, Estrel Berlin Hotel and Congress Centre:ssä 15. ja 16. marraskuuta.

Vaikka tapahtuman pääpaino on eurooppalaisissa soittimissa, The Holy Grail Guitar Show:n pitkältä näytteilleasettajien listalta (joka sisältää yli sataa soitinpajaa) löytyy myös kitararakentajia esim. USA:sta, Kanadasta tai Japanista. Suomalaisia nimiä löytyy listalta muuten yllättävän monta:


Amfisound Guitars

Liljeström Guitars

Lottonen Guitars

Ruokangas Guitars

Soitinpaja Jasesoi

Tyyster Guitars

Versoul Instruments

Tarkempaa lisätietoa tapahtumasta saa TÄSSÄ. on luonnollisesti myös menossa!

Review: Tokai ES-138/SR • ES-145G/BB • ES-162/TB

Tokai ES-162 – and case

Tokai Guitars have a well-earned reputation for making high-quality electric guitars and basses, often ”inspired” by vintage designs. This time we got three semis from the very top of Tokai’s Japanese model range for review.


Tokai ES-138SR – full front

The Tokai ES-138 (current price in Finland: 1,368 €, incl. hard case) is the company’s version of a 1958 Gibson ES-335, available in either see-through red or piano black.

Tokai ES-145G – full front

Tokai’s ES-145G (current price in Finland: 1,431 €, incl. hard case) is a lightly updated variation on the theme, which comes equipped with gold-coloured hardware and a black finish.

Tokai ES-162TB – full front

The Tokai ES-162 (current price in Finland: 1,628 €, incl. hard case) is the most expensive model of the three on review. The ES-162 comes with post-1962 style small block markers, brass bridge saddles, and a light aluminium stopbar. The icing on the cake is this model’s vintage-style nitrocellulose finish – you can choose between a tri-burst and red.

Tokai ES-138 – headstock

Tokai use top-drawer Gotoh tuners on the three tested models.

Tokai ES-138 – tuners

The ES-138 and ES-162 come equipped with vintage-style Kluson-copies.

Tokai ES-145G – headstock

Tokai ES-145G – tuners

For the ES-145G Tokai have chosen a set of modern enclosed Gotohs.

Tokai ES-145G – fingerboard

These Tokai Japan -instruments all come with a one-piece mahogany neck, complete with a vintage-correct, steep headstock angle (17 degrees).

The bound rosewood fretboards on the ES-138 and ES-145G models sport dot markers.

Tokai ES-162 – fretboard

As the ES-162 is Tokai’s version of a 1962-’64 ”Block Marker” ES-335, this guitar comes with small rectangular inlays made of pearloid.

All three instruments come fitted with medium-size frets.

Tokai ES-138 – bridge

Tokai’s ES-guitars come with Gotoh Tune-o-matic-bridges and stopbar tailpieces.

Tokai ES-145G – bridge

On the ES-138 and the ES-145G we find Gotoh’s LS-series hardware – die-cast (Zamac) parts with steel bridge saddles.

The ES-162 goes one step more ”vintage” by using a Gotoh HLS -set, comprising an ultra-light aluminium stopbar tailpiece and chrome-plated brass saddles on the bridge.

Tokai ES-162 – pickups

This guitar trio is equipped with the same pickups – a pair of Tokai PAF-Vintage Mark II -humbuckers.

Tokai ES-145G – controls

All the electronic components are top quality Japanese parts.

Tokai ES-case

Certain Tokai Japan -models are now sold in Finland complete with Tokai’s cool hard cases.


Tokai ES-138 – beauty shot 1

The cherry red semi-acoustic is one of guitardom’s most iconic electric models. For many this curvy and well-rounded body, made from heat-pressed maple plywood, is the most beautiful body style ever.

Tokai’s ES-138 recreates this classic guitar in its earliest guise (c. 1958), complete with dot markers and a long pickguard, which extends past the bridge.

Even though an ES-335-type body is comparatively large (but thin), many of the best semi-acoustics are surprisingly lightweight. The Tokai ES-138 is very comfortable to play – both seated and strapped on – and balances superbly.

This model’s neck profile is a medium-thick ”D”, which feels great (at least in my hand). The fret job on the test sample was excellent, the set-up spot-on, and the action very light (with a set of 010s). The ES-138’s acoustic tone is typical of this type of guitar – very hollow and nasal with a clicking attack.

Tokai’s own rendition of the classic PAF-humbucker is superb, there’s no two ways about this! The output signal is moderate, and the basic sound is very open and dynamic. The neck pickup has a warm, round tone, but doesn’t mush up. The middle position on the selector switch gives you a very balanced and open sound. The bridge humbucker on its own sounds fresh and crispy, with not even a hint of annoying mid-range ”nagging”.

Tokai ES-138 – body beauty


Tokai ES-145G – beauty shot 1

The black-and-gold ES-145G sure looks very stylish – this is the distinguished gentleman in Tokai’s ES-range, who keeps his cool and looks dapper, no matter what.

Our test sample was the heaviest guitar of this trio, but still much, much lighter than may lesser contenders.

The ES-145G’s neck profile is also the chunkiest. This D-profile is a real palm-filler, giving you a real taste of late-Fifties goodness, and managing to stay just on the right side of ”fat”.

The workmanship displayed, and playability offered by the ES-145G are simply superb. Played acoustically there’s not a lot of difference between the ES-145G and the ES-138.

Through an amp, the ES-145G sounds just like a quality semi-acoustic should – humbucker power, balanced by a clean mid-range.

Tokai ES-145G – body beauty


Tokai ES-162 – beauty shot 1

Our review sample of the Tokai ES-162 is a real featherweight!

The ES-162’s Block Marker -personality is completed by an authentic early-Sixties style neck profile. It’s an oval ”C” that is less of a handful than the ES-138’s neck.

Top marks for the ES-162’s workmanship, finish and playability – this is a first-rate instrument.

This model’s thin nitro lacquer, its lightweight tailpiece, as well as the brass saddles on the Tune-o-matic combine into a very open-sounding and dynamic acoustic performance.

Standing in the same room with your amp, it is easy to notice an added degree of 3D-depth and scope in the guitar’s amplified tone. Interestingly – as is so often the case – recording the sound doesn’t seem to fully convey this added tonal dimension. You have to experience the ES-168 ”in the flesh” to get the full picture; the recordings sound remarkably similar to the other two models’ performances.

Tokai ES-162 – body beauty


Tokai ES-162 – label

The reputation of Tokai Japan -instruments has been legendary among players and collectors ever since the 1970s. This trio of ES-semis makes it crystal-clear that Tokai actually deserves this reputation thanks to the superb quality of it’s Made-in-Japan guitars.

Tokai’s ES-138, ES-145G and ES-162 offer you genuine Japanese quality at very fair prices.


Tokai Japan semi-acoustic electrics

Tokai ES-138 – 1,368 € (hard case included)

Tokai ES-145G – 1,431 € (hard case included)

Tokai ES-162 – 1,628 € (hard case included)

Finnish distributor: Musamaailma



+ Japanese workmanship

+ one-piece neck

+ superb finish and set-up

+ Gotoh-hardware

+ authentic tone

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