THD Electronics UNI112BLK UniValve 1-12 Combo, Black, 120V

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This THD amp is a 15W, 1x12 combo version of the UniValve and features the same Single-Ended Class A amplifier head with a single output tube that can be switched at will among many octal-based power tubes, including 6L6, EL34, 6550, KT90, KT88, KT77, and KT66 for different tones without re-biasing the amp. Likewise, the 2 preamp tubes can be any combination of 12AX7, 12AT7, 12AU7, 12AY7 or 12AZ7. The UniValve delivers tones from smooth and clear to very aggressive overdrive. It is easily capable of driving a 4 x 12" cabinet, yet quite small and light. The 15W THD UniValve amp has a built-in Hot Plate Power Attenuator that allows for full output distortion at almost any volume. And it doesn't cost as much as you might think.What is a Class A? Class A is a term given to an amp that runs its tubes at full current all the time, unlike most tube amps that alternate between running one set of tubes and the other set, each for one half of the wave. The set not in use is turned off by a positive swing of the grid voltage. Single-ended output stages always operate in Class A. Most push-pull amplifiers operate in Class AB when overdriven, even if they are in Class A while clean. The upshot is that Class A operation has its own unique tone characteristics that set it apart from other tube amp classes. Class A amps sound great at low volumes and even better as you turn them up. Thus, with the relatively low wattage of the THD UniValve, you can turn up the amplifier to take full advantage of its stunning output distortion tone without deafening anyone.Why the self-biasing feature? The UniValve tube amp's circuitry senses the current needs of the output tube and provides the correct bias voltage to the cathode of the output tube regardless of tube type or wear. This means that, without any trip to an amp technician, you can simply replace the output tube with one that has different sound characteristics. (Of course, you can also change the preamp tubes at will for e
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- The THD UniValve is a Single-Ended Class A amplifier head with a single output tube that can be switched at will among many octal-based power tubes including 6L6, EL34, 6550, KT90, KT88, KT77 and KT66, for different tones without re-biasing the amp
- "Its one of the worlds best sounding, best looking and best made amps." - Guitarist Magazine
- "Just when you think there are no new tricks in the boutique world, THD has pulled a rabbit out of a hat with this baby. With its tonal range, smart features, and superb craftmanship, the UniValve is a bang-for-buck winner." - Guitar Player Magazine
- For every 1x12 combo amp sold, THD Electronics donates to American Forests to have two trees planted. Your purchase helps the environment!
- Hand-built in Seattle, WA.
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THD Electronics FLX112BLK Flexi-50 1-12 Combo, Black, 120V

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The THD amp is a 1x12 combo version of the hand-built, single-channel THD Flexi-50 50W/20W Class AB Amplifier Head and can operate loaded with almost any preamp and power tubes in any combination. It's the only guitar amplifier you need to own. Whether you strive for English overdrive, California clean, or Texas punch, this master-class head can deliver it. The THD Flexi-50 also boasts a heady 50W Class-AB operation, footswitchable overdrive/boost, and footswitchable master volume control. It's consistently overbuilt and pristine circuitry ensures dramatic touch sensitivity even at the highest overdrive settings. Its incredible flexibility (the reason it's named Flexi-50) delivers all the sounds and tones you could possibly desire, from vintage purr to modern, high-gain roar.The Flexi-50 tube amp has a Lo/Hi input switch; Volume, Treble, Middle, Bass, Master, and Cut knobs; Boost section with separate Gain and Tone knobs, and a wattage select switch (50W/20W).
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- English Overdrive California Clean. Texas Punch.
- "If youre a tone tweaker with a good assortment of tubes, youll have a blast experimenting with more unusual tube types and combinations in the quest to find a personalized sound thats as unique and fresh as the Flexi-50s design. This is an outstanding amp, and it wins an Editors Pick Award." - Guitar Player Magazine
- This 1x12" combo version provides more punch and bottom-end that you can imange a single 12" could.
- For every 1x12 combo amp sold, THD Electronics donates to American Forests to have two trees planted. Your purchase helps the environment!
- Hand-built in Seattle, WA.
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THD Electronics BV112BLK BiValve-30 1-12 Combo, Black, 120V

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This THD amp is a 30W, 1x12 combo version of the THD BiValve-30 Class A Amplifier Head which has 2 output tubes wired in parallel and combined through a special output transformer to deliver up to 30W. It accepts almost any type of output or preamp tube without bias adjustment—even in combination—for an astonishingly wide range of tone available for nearly any style of guitar playing. The amplifier's construction is absolutely top class, as you would expect for any handmade amplifier.Underneath its large, perforated steel lid you'll find large transformers and hi-fi style internal baffle plates to cut down on hum, as well as the tube sockets. On its front panel is a pair of input jacks labeled More and Less, followed by a Cut switch (high-cut filter), Volume, Treble, Bass, and Attitude (driver tube response control). In the center is a light bulb that glows as the amp distorts with a small switch to turn it off, a control for the THD BiValve-30's built-in Hot Plate (output attenuator), and a defeat switch for the Hot Plate.The THD BiValve-30 amp sports an acid-etched control plate with a delicate marine theme inspired by Glasgow artist Charles Rennie Mackintosh.
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- Make all of your Tone Dreams come true with the THD BiValve-30. Great headroom, shimmery highs and tight bass characterize this little monster.
- Like the UniValve, the BiValve-30 is a Single-Ended Class A amplifier head but with two output tubes that can be switched at will among many octal-based power tubes including 6L6, EL34, 6550, KT90, KT88, KT77 and KT66, for different tones without re-biasing the amp
- This 1x12" combo version is one of the most versitile studio and stage amps in the world.
- For every 1x12 combo amp sold, THD Electronics donates to American Forests to have two trees planted. Your purchase helps the environment!
- Hand-built in Seattle, WA.
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THD Electronics 112KIT BLK 1-12 Combo Conversion Kit for UniValve, BiValve-30, Deco-36 or Flexi-50, Black

Buy Cheap THD Electronics 112KIT BLK 1-12 Combo Conversion Kit for UniValve, BiValve-30, Deco-36 or Flexi-50, Black

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The 1x12 guitar combo amp cabinet from THD is a tuned-port bass-reflex cabinet with a number of features that substantially reduce standing waves inside the cabinet, giving it a very deep, even, tight, and punchy sound. This conversion kit is meant for existing UniValve, BiValve-30, or Flexi-50. You won't believe that you are listening to only a single 12" THD Vintage speaker; the THD guitar speaker is designed to sound as full and tight as a 2x12 cabinet.
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Technical Details

- Retrofit cabinet to convert any THD UniValve, BiValve-30, Flexi-50 or Deco-36 into a 1x12" combo amplifier. Loaded with a hand-tuned THD Vintage 12" speaker.
- Cabinet is made of 13 ply Baltic Birch with special 3D interlocking joints for amazing stiffness and strangth.
- Specially tuned cabinet to mimize standing waves, which gives a much fuller, deeper and more powerful sound than from any other 1x12" cabinet.
- For every 1x12 combo cabinet sold, THD Electronics donates to American Forests to have two trees planted. Your purchase helps the environment!
- Hand-built in Seattle, WA.
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