At first glance, the simple signal path with a preamp consisting of a single 5879 pentode and an AC30-ish poweramp does not suggest there is too much gain to offer. However, once you hit the strings hard, the few tubes overdrive one another massively and produce a surprising amount of rock'n'roll distortion.

FEATURES:

Volume after the input pentode

Tone - the 5-way switch is actually an adjustable high-pass filter after the input pentode

Cut - An AC30 style tone-cut after the phase invertor

Output - the 3-way switch uses a post phase inverter volume attenuation and/or disconnects a pair of EL84 powertubes to reduce power to 25 or 50 percent

High / Low voltage selector switches between taps of the power transformer's secondary windings. High (Fast) has more attack and is louder, thighter and brighter. Low (Soft) is smoother with earlier compression.

SPECIFICATIONS:

Preamp: 1x 5879 pentode

Poweramp: 1x 12AX7, 1x GZ34 rectifier, 4x EL84 / 38W, cathode biased

Dimensions (W/H/D): 500 x 230 x 240 mm

A lightweight cabinet was made of birch plywood with thickness ranging from 12 to 18 mm.

SPECIFICATIONS:

Speaker: Celestion Alnico Gold

Dimensions (W/H/D): 520 x 480 x 260 mm

Mixing "bright" and "normal" input volume works equally great on this compact head as it does on original Auron's first channel. Otherwise, it is quite a different animal, both in terms of weight and power rating.

SPECIFICATIONS:

Preamp: 2x 12AX7

Poweramp: 1x 12AX7, 2x 6V6 / 20W

Dimensions (W/H/D): 500 x 220 x 200 mm

A lightweight cabinet was made of birch plywood with thickness ranging from 12 to 18 mm.

SPECIFICATIONS:

Speaker: Celestion Alnico Cream

Dimensions (W/H/D): 580 x 500 x 320 mm

This solid pine combo is built around the traditional "blackface" AB763 circuitry. However, contrary to tradition, some things were simplified (no normal channel and tremolo), while other things were added (master volume with a footswitchable boost, presence control).

SPECIFICATIONS:

Preamp: 2x 12AX7

Reverb: 1x 12AT7, 1/2 12AX7

Poweramp: 1x 12AX7, 2x6V6 / 20W, 1x 5AR4 rectifier

Speaker: Jensen C12K

Dimensions (W/H/D): 610 x 440 x 240 mm

Based on early '60s Super Amp, this two-channel combo is "tweed" in terms of voicing and both the external and the internal design. However, it also includes many useful updates like e.g. footswitchable channels or master volume & volume boost.

Channel 1 is very straighforward and dynamic.
Channel 2 incorporates the famous "harmonic tremolo".

SPECIFICATIONS:

Preamp: 5x 12AX7

Poweramp: 1x 12AX7 , 2x6L6/5881 / 40W, 1x 5AR4 rectifier

Speakers: 2x Celestion Alnico Gold 10"

Dimensions (W/H/D): 610 x 440 x 240 mm

More info coming soon.

SPECIFICATIONS:

Tubes: 5x 12AX7

Dimensions (W/H/D): 484 x 134 x 250 mm

Compared to a "normal" head, internal layout had to be considerably rearranged. However, in terms of sound and controls it is still the proven Auron design, with the only exception of a lightweight 20W poweramp. MIDI controlled channels and other features.

SPECIFICATIONS:

Preamp: 4x 12AX7

Poweramp: 1x 12AX7, 2x6V6 / 20W

Dimensions (W/H/D): 484 x 134 x 330 mm

This rackmount head with separate eq control was quite an engineer's challenge since we had to take advantage of its internal free space carefully, but finally it came up very well :-)
Its 4U of height enabled the power tubes to be mounted vertically on the upper side of chassis and to maximize their life expectancy and overall stability.
Its independent eq and presence controls and MIDI controllable channels, Plexi-mode, FX loop and volume boost push Auron's versatility even further.

SPECIFICATIONS:

Preamp: 4x 12AX7

Poweramp: 1x 12AX7, 2xEL34 / 50W

Dimensions (W/H/D): 484 x 178 x 330 mm

This ultimate four-channel version offers the same sounds as a standard three-channel Auron, but its extended channel strips with separate eq's can satisfy needs of players who demand absolute control of their gear (and who likes to tweak it).

Channel 1 = standard Auron's Clean Mode
Channel 2 = standard Auron's Plexi Mode
Channel 3 = standard Auron's Channel 2
Channel 4 = standard Auron's Channel 3

Channel 3 and Channel 4 eq's are equipped with a footswichable Mid-Boost.

There are also two footswitchable effects loops:
FX Loop 1 = series
FX Loop 2 = parallel

SPECIFICATIONS:

Preamp: 5x 12AX7

Poweramp: 1x 12AX7, 2xEL34 / 50W

Dimensions (W/H/D): 700 x 260 x 260 mm

Another variaton of a proven recipe. This custom version has a slightly reduced maximum power (45W instead of 50W) and extended power-scaling features. The Full/Half Power Switch lowers the anode voltage of power tubes and enables their earlier breakup.

Tech Note:
Lowering supply voltage is a frequent solution to reduce output power without sacrificing natural tone - if done properly. However, most manufacturers simplify this feature by lowering the supply voltage for the entire hi-voltage rail, which means that both preamp and poweramp supply voltages are reduced. This way, preamp voicing and dynamics can be severely affected.
To minimize the undesired effects, this Auron uses a voltage compensation circuit to maintain the preamp supply voltage at similar levels no matter whether full or half power is engaged.

Also, the eq section was expanded by the addition of a footswitchable Mid-boost, a simple yet powerful feature that lets solos cut through a live mix greatly.

SPECIFICATIONS:

Preamp: 4x 12AX7

Poweramp: 1x 12AX7, 2xEL34 45W/25W (full/half power)

Dimensions (W/H/D): 620 x 240 x 260 mm

A compact 2x12 cabinet is fitted with a very popular speaker mix, a balanced blend of singing harmonics and a midrange crunch.

SPECIFICATIONS:

Construction: 2x12 enclosed horizontal cabinet

Material: high quality 15mm 11 times folded birch plywood

Speakers: Celestion Vintage 30 + Celestion G12M Greenback

Power rating: 50W

Dimensions (W/H/D): 680 x 450 x 320 mm

A slightly simplifierd 50W Auron in a slighty smaller package.

SPECIFICATIONS:

Preamp: 4x 12AX7

Poweramp: 1x 12AX7, 2xEL34 / 50W

Dimensions (W/H/D): 660 x 260 x 260 mm

There are many ways to create classic clean and rock sounds. This time we utilised a very unorthodox approach.

Channel one could be described as a "plexi on steroids". It has plenty of gain thanks to a 5879 pentode used for the input section. A six-position tone switch is actually a high-pass filter so that the right amount of bass and lo-mids can be set in order to get thick, yet articulate distortion. At least, but not last, there is no bass-middle-treble equalization: since all eq's of this kind are naturally V-shaped (i.e. mid-cutting), omitting the eq results in much more mids and presence, making it a perfect lead sound.

Channel two uses an archytypal "twiny" topology with its shimmering treble and an essential tube-driven spring reverb.

And then there is probably the most interesting feature, the channel mixing: both preamp channels can be mixed together at a any desired ratio, effectively creating a third channel. This way you can dial e.g. a rhythm sound, mixing rich harmonics of the lead channel with tight, undistorted bass of the clean chanel.

FEATURES:

Channel 1: Volume (w/ a push-pull Gain-boost), Tone, Master

Channel 2: Volume (w/ a push-pull Gain-boost), Treble, Middle, Bass, Reverb

Spring Reverb - tube-driven, vintage style circuit

Half power mode disconnects a pair of 6V6's

SPECIFICATIONS:

Preamp: 1x 5879 pentode, 4x 12AX7

Reverb: 1x 12AT7, 1/2 12AX7

Poweramp: 1x 12AX7, 1x GZ34 rectifier, 4x 6V6 / 40W, cathode biased

Dimensions (W/H/D): 620 x 250 x 260 mm

The complimentary cabinet is a proven open-back construction fitted with a proven speaker combination.

SPECIFICATIONS:

Speakers: Celestion Alnico Blue + Alnico Gold

Dimensions (W/H/D): 700 x 570 x 260 mm

Basically, Greenwreck is a Redwreck with plenty of features added, e.g. an fx-loop, on-board reverb or a footswitchable master volume. Both its channels use identical circuitry, however they are supposed to be used and dialed different ways - channel 1 as a clean and channel 2 as a lead one - hence the implementation of a middle knob.

FEATURES:

Channel 1: Gain, Bass, Treble, Volume

Channel 2: Gain, Bass, Middle, Treble, Volume

All-tube Series Effects Loop

Master A/B- two footswichable output volume levels

Spring Reverb - tube-driven, vintage style circuit

Tone Cut

Half power mode disconnects a pair of EL84's

High / Low voltage selector: High (Fast) has more attack and is louder, thighter and brighter. Low (Soft) is smoother with earlier compression.

SPECIFICATIONS:

Preamp: 4x 12AX7

Reverb: 1x 12AX7

Poweramp: 1x 12AX7, 1x 5AR4 rectifier, 4x EL84 / 30W, cathode biased

Dimensions (W/H/D): 580 x 240 x 260 mm

Greenwreck complimentary cabinet is closely based on its red predecessor, too. The only technical difference is a slightly angled baffle.

SPECIFICATIONS:

Speakers: Celestion Alnico Blue + Alnico Gold

Dimensions (W/H/D): 700 x 570 x 270 mm

The little head on the top of the red pyramid is actually "an overgrown stompbox". We used 60's 6G15 stand-alone spring reverb unit and upgraded it with a few features to comply with today's standards like true-bypass switching and low impedance output buffer. What's more, the integrated footswitchable tube-driven mid boost is capable of pushing more gain of of the Redwreck head below.

FEATURES:

Dwell, Mixer, Tone (reverb section)
Boost level (mid boost section)

SPECIFICATIONS:

Tubes: 1x 12AT7, 2x12AX7, 1x 6V6

Dimensions (W/H/D): 440 x 200 x 200 mm

Pretty straightforward and extremely responsive, Redwreck was built with the idea that less is more in mind. Since it is based on AC30's top-boost channel, one might think its main purpose is to deliver clean twangy sound - and it can do so very well. However, once you turn the input volume up, Redwreck comes to a territory of a classic British voiced rock distortion. Its responsiveness is really exceptional which enables to "switch" between clean, crunch and lead sound using just a guitar volume knob.

FEATURES:

Volume, Bass, Middle and Treble

Master Volume

Tone Cut

Half power mode disconnects a pair of EL84's

High / Low voltage selector switches between taps of the power transformer's secondary windings. High (Fast) has more attack and is louder, thighter and brighter. Low (Soft) is smoother with earlier compression.

SPECIFICATIONS:

Preamp: 2x 12AX7

Poweramp: 1x 12AX7, 1x GZ34 rectifier, 4x EL84 / 30W, cathode biased

Dimensions (W/H/D): 500 x 230 x 240 mm

Equipped with a proven mix of Celestion Alnico speakers, this cabinet is perfect match for Redwreck's vintage British voicing.

SPECIFICATIONS:

Speakers: Celestion Alnico Blue + Alnico Gold

Dimensions (W/H/D): 700 x 570 x 260 mm

The colour of the tolex is pretty self-explanatory in this case, whereas the name "Juicer" probably needs some explanation: it is meant to say that "there is a lot of juicy pulp inside"... And maybe also something about how the machine can cope with various species of citrus fruits ;-)

FEATURES:

Channel 1:
A very bright "British" clean tone with shimmering upper harmonics.

Channel 2:
The Juicer's distorted channel is extremely versatile. Its gain knob has an exquisite usable range - from a raw, tight crunch to a hairy hi-gain lead.

Bass, Middle and Treble independent on both channels

All-tube Series Effects Loop

Master A/B- two footswichable output volume levels

Spring Reverb - tube-driven, vintage style circuit

Presence, Depth

The half power mode lowers power tubes' anode voltage to reduce their total power to about a half and to enable earlier power amp compression. However, unlike most similar constructions, this one is a little bit more sophisticated: it compensates the preamp supply voltage drop and power tubes' bias, so that the overall voicing and gain structure does not change dramatically.

SPECIFICATIONS:

Preamp: 3x 12AX7, 1x 12AT7

Reverb: 1x 12AT7

Poweramp: 1x 12AX7, 2x EL34 / 50W

Dimensions (W/H/D): 660 x 260 x 260 mm

Another variation on a classic princeton-ish theme, enriched with various interesting features.

Beside its portability, one the most important criteria was the ability to be used as a poweramp. Therefore a tone-cut was added to tweak the treble response in case that the signal skips the preamp's equalizer.

FEATURES:

High and Low inputs

Volume, Bass, Middle and Treble

Preamp output

Poweramp input

Master Volume

Tone Cut

SPECIFICATIONS:

Preamp: 2x 12AX7

Poweramp: 2x 6V6 / 15W, 1x 5AR4 (rectifier); swichable tube or solid-state rectification

Dimensions (W/H/D): 430 x 200 x 200 mm

A perfectly purist combo built for Igor Ochepovsky (RU), an outstanding jazz guitarist and composer.
www.ochepovsky.com

Its preamp is based on an archetypal princeton circuitry, however we used a more powerful poweramp and a speaker with a great power handling capability, so that the bass is tight at virtually any volume.

The combo is built of solid pine hence it could hardly be more vintage.

FEATURES:

High and Low inputs

Volume, Bass, Middle and Treble

Poweramp input

Master Volume

Slave out, frequency compensated, direct recording capable

SPECIFICATIONS:

Preamp: 2x 12AX7

Poweramp: 2x 6V6 / 20W, 1x 5AR4 rectifier

Speaker: Jensen C12K

Dimensions (W/H/D): 610 x 440 x 240 mm

This two-channel head is derived directly from its bigger three-channel brother. The first channel is completely identical. On the second one we added a little gain because of better versatility without the third hi-gain channel.
On the last photograph, you can see a comparison of the compact two-channel and the classic three-channel version

SPECIFICATIONS:

Preamp: 4x 12AX7

Poweramp: 1x 12AX7, 2xEL34 / 50W

Dimensions (W/H/D): 620 x 250 x 260 mm

The ultimate 4-channel Flagship in a custom vintage design. It is basically the same amp in terms of sound and features, with the exception of an additional MIDI control.

SPECIFICATIONS:

Preamp: 5x 12AX7

Poweramp: 1x 12AX7, 2xEL34 / 50W + 2x KT88 / 95W (or 2x 6L6GC / 60W)

Dimensions (W/H/D): 680 x 260 x 260 mm

A compact 2x12 reprobox fits under the 680mm head perfectly.
The combination of speakers is mainly suitable for metal players who prefer an agressive, mid-scooped sound.

SPECIFICATIONS:

Construction: 2x12 enclosed horizontal cabinet

Material: high quality 15mm 11 times folded birch plywood

Speakers: Celestion Vintage 30 + Celestion G12T75

Power rating: 120W

Dimensions (W/H/D): 680 x 370 x 320 mm

Weight: 24 kg

A very special 3-channel head built for Václav Vaňura aka Láska.

FEATURES:

Channel 1:
From a shimmering clean tone to a cutting crunch with a distinctive "plexi" flavour.
Bright/warm switches between two different brightness settings to suit different instruments.

Channel 2:
A huge "800-ish" rock sound.
Brit / fat toggles between a sharper British rock sound and a greasier, more saturated sound. This is very useful especially with single-coil pickups.

Chanell 3:
JCM800 on steroids!
Deep /norm toggles between a normal and a little more "heavy" voicing with an emphasized low end.

Bass, Middle, Treble a Presence common for all channels

All-tube Series Effects Loop

Solo boost - a footswichable volume boost for solo playing

Output Volume control sets overall volume after the fx loop

Spring Reverb - tube-driven, vintage style circuit

Depth - enhances a low-end response of the poweramp

SPECIFICATIONS:

Preamp: 3x 12AX7

Reverb: 1x 12AT7

Poweramp: 1x 12AX7, 2x EL34 / 50W

Dimensions (W/H/D): 480 x 220 x 280 mm

This compact hi-gain head was derived directly from our four-channel flagship. We used Flagship's channels 1 and 4 and created this wine-red beauty.

FEATURES:

Channel 1 - Clean:
Clean mode - a transparent clean sound, classic fender topology with eq after the first gain stage
Fat mode - based on Clean mode, however its enhanced mid-frequencies enable a slight overdrive

Channel 2 - Rhythm:
An "almost hi-gain" mode with strong attack and tight bass. Great for classic rock, 80's metal and much more.

Channel 3 - Lead:
Lead mode - our distinctive HDR modern hi-gain with emphasis on upper mids that cuts through any mix very well
Lead+ mode - based on the Lead mode but it has a different eq contour with scooped mids and more agressive poweramp voicing; the heaviest mode of all

Bass, Middle, Treble and Presence independent on all channels

All-tube Series FX Loop with an adjustable Send Level, footswitchable

Output Volume control sets overall volume after the fx loop

Solo boost - a footswichable volume boost for solo playing

Depth - enhances a low-end response of the poweramp

SPECIFICATIONS:

Preamp: 4x 12AX7

Poweramp: 1x 12AX7, 2x KT88 / 95W

Dimensions (W/H/D): 660 x 260 x 260 mm

A very special head that puts two thoroughly different sounds into one amplifier.

FEATURES:

Channel 1 - Vintage Clean & Drive:
Clean mode - a classic American clean inspired by a popular deluxe/deville topology. Not a crystal-clean glassy sound, rather a little dirty, with great harmonics.
Drive mode - turns the Clean mode into a cutting rock-n-roll drive with a simple click of a footswitch. A hot crunch sound that cleans up well with a guitar's volume knob as well.

Channel 2 - Modern Lead:
A perfect opposite of the first channel. Based on the iconic Van Halen modern hi-gain sound, the Lead Channel offers much more gain than you would expect from such a vingate looking amp - truly a wolf in sheep's clothing.

All-tube Series FX Loop, footswitchable

An effect pedal can be placed in a shelf inside the headshell and connected to the fx loop permanently. What's more, the pedal can be powered by an integrated 9V DC power supply, so that you just plug in the footswitch and you can toggle the effect on and off.

Spring Reverb - tube-driven, vintage style circuit with a classic reverb drive transformer and a long spring reverb unit with extra long decay. In the signal path the reverb is placed after the fx loop, which is sonically superior to the before-the-loop solution found in most multi-channel amplifiers. Footswitchable.

Output Volume control sets overall volume after the fx loop

Solo boost - a footswichable volume boost for solo playing

SPECIFICATIONS:

Preamp: 6x 12AX7

Reverb: 1x 12AT7

Poweramp: 1x 12AX7, 2x 6L6GC (5881) / 50W

Dimensions (W/H/D): 660 x 260 x 260 mm

A custom cabinet that matches the sound of the "Custom Superior" head. Solid birch wood adds some resonance and a unique "feel", too.
Tilt-back legs made of stainless steel are a very handy feature especially at crowded stages.

SPECIFICATIONS:

Construction: 2x12 enclosed horizontal cabinet

Material: 17mm solid birch wood

Speakers: 2x Celestion G12M Greenback

Power rating: 50W

Dimensions (W/H/D): 770 x 420 x 360 mm

Weight: 27 kg

An eye-catching head, custom designed and built for Jaroslav Tauber, an immensely talented lead guitarist of a promising Czech rock band Plan B.

FEATURES:

Channel 1:
Clean mode - a transparent clean sound, classic fender topology with eq after the first gain stage
Fat mode - based on Clean mode, however its enhanced mid-frequencies enable a slight overdrive

Channel 2 - "British Green":
Vintage mode - old-school crunch based on the legendary "plexi"
Brit mode - a British rock sound reminding the 80's, the era of famous JCM800's" ruling the rock music
Lead mode - a modern hi-gain sound with a British flavour

Channel 3 - "Red":
Rhythm mode - in terms of gain this is an "almost hi-gain"" mode; with its outstanding articulation it suits fast riffs the best
Lead mode - proven HDR modern hi-gain with emphasis on upper mids that cuts through any mix very well
Lead+ mode - similar to Lead mode in terms of gain but with different eq voicing; scooped mids and boosted treble make it the most agressive mode of all

Bass, Middle, Treble and Presence independent on all channels

Two FX Loops, tube buffered:
1) Series FX Loop with an adjustable Send Level
2) Parallel FX Loop with an adjustable Mix Level
Both the loops can be assigned to any channel, always switched on or footswitched.

Output Volume control sets overall volume after the fx loop

Solo boost - a footswichable volume boost for solo playing

Depth - enhances a low-end response of the poweramp

SPECIFICATIONS:

Preamp: 4x 12AX7

Poweramp: 1x 12AX7, 2x KT88 / 95W

Dimensions (W/H/D): 700 x 260 x 260 mm

A rock-solid two-channel head that fulfills all demands for a user friendly amplifier with reasonable amount of features and many tone possibilities.

FEATURES:

Channel 1:
Clean mode - a transparent clean sound, classic fender topology with eq after the first gain stage
Fat mode - based on Clean mode, however its enhanced mid-frequencies enable a slight overdrive

Channel 2:
Crunch mode - a bright rock sound with a little British "80's" flavour
Lead mode - an extremely articulate modern hi-gain suitable for even the heaviest of metal genres

Bass, Middle, Treble and Presence independent on both channels

All-tube Series FX Loop with an adjustable Send Level, footswitchable

Output Volume control sets overall volume after the fx loop

Solo boost - a footswichable volume boost for solo playing

Depth - a very useful feature that enhances a low-end response of the poweramp; great for huge yet tight bass

SPECIFICATIONS:

Preamp: 4x 12AX7

Poweramp: 1x 12AX7, 2x 6L6GC / 60W (up to 90W using KT88)

Dimensions (W/H/D): 700 x 260 x 260 mm

One might think that a photo of a 4x12 cabinet crept in by mistake, therefore we add a shot with front grille removed. What are advantages of this unconventional design since lightweight 4x12 cabinets are only a few kilograms heavier? There is a resemblance between guitar cabinets and sportscars: a powerful engine is worthless without adequate suspension, brakes, etc. Similarly, guitar cab require adequete construction to use full speakers' power. Compared to lightest 4x12 cabinets, this huge 2x12 cab can be much stiffer and more resistent to undesired mechanical vibrations, hence tighter and more articulate sounding.

SPECIFICATIONS:

Construction: 2x12 enclosed vertical cabinet, slanted

Material: high quality 18mm 13 times folded birch plywood

Speakers: 2x Celestion Vintage 30 (different speakers as an option)

Power rating: 120W

Dimensions (W/H/D): 700 mm x 715 x 360 mm

Weight: 36,5 kg

One of the most interesting facts about the famous "Plexi", an archetype of the classic "British sound", is that it originated as a Fender Bassman clone. Today, we can think of it as the perfect example of how very similar circuits (schematics) sounding very unalike due to different components such as tubes, transformers or capacitors. Furthemore, the significance of power supply should not be underestimated since it has a considerable influence on amplifier's frequency response and dynamics.

FEATURES:

Classic "Plexi" Style Inputs: Low & High Input 1 - Bright, Low & High Input 2 - Normal

Gain 1 - Normal, Gain 2 - Bright; the inputs can be blended together at any required ratio

Bass, Middle and Treble Controls

Master Volume Control enables to get nice overdriven tones at lower volumes

Classic Bassman / Plexi style Presence Control

Custom built solid birch headshell, red stain, acrylic urethane glossy finish

SPECIFICATIONS:

Preamp: 2x 12AX7

Poweramp: 1x 12AX7, 2x EL34 / 50W

Dimensions (W/H/D): 490 x 230 x 205 mm

This handy combo combines Bassman style preamp with a very dynamic 2x6V6 / 20W poweramp (similar to some Deluxe models)

The combo is built of solid pine wood, much like old Fender combos and cabs. In comparison to common plywood construction the solid pine adds some resonce and it is an important ingredient of the appreciated vintage American tone.

FEATURES:

Two Inputs: Input 1 - Normal, Input 2 - Bright (Bassman style, "low" inputs omitted)

Gain 1 - Normal, Gain 2 - Bright; the inputs can be blended together at any required ratio

Bass, Middle and Treble Controls

Master Volume Control enables to get nice overdriven tones at bedroom volumes

Classic Bassman / Plexi style Presence Control

SPECIFICATIONS:

Preamp: 2x 12AX7

Poweramp: 1x 12AU7, 2x 6V6 / 20W

Speaker: Celestion Classic Lead, 80W, 99dB
(the customer's choice in order to minimize speaker distortion at higher volumes; a vintage style speaker with an AlNiCo magnet could be a great option as well)

Dimensions (W/H/D): 470 x 440 x 230 mm