The Joat Amplifiers

Burnt Orange on Poplar natural finish
Available in 20/30/45 Watt Versions
With Reverb/Tremolo

The Joat Amplifiers

Cherry Red on Cherry natural finish
Available in 20/30/45 Watt Versions
With Reverb/Tremolo

The Joat Amplifiers

Midnight Blue on Cherry natural finish
Available in 20/30/45 Watt Versions
With Reverb/Tremolo

The Joat Amplifiers

Blueberry Tolex with Gold piping on Poplar
Available in 20/30/45 Watt Versions
With Reverb/Tremolo

The Joat Amplifiers

Raspberry Tolex with Gold piping on Pine
20 Watt Single 12" Combo

The Joat Amplifiers
JACK OF ALL TONE
Toggle Finish

The JOAT doesn't have conventional tone controls. IT'S ALL TONE - but you can take some away if you like.

Handmade in the USA
Todd Sharp Amplifiers

When you plug in, it’s not just about how you hear your guitar. It’s about how you connect with your instrument – so  you can connect with the music and get right inside it. I build amplifiers with superior reflexes – amplifiers that respond to the way you touch the fingerboard and to subtle adjustment of your guitar controls.  These are the kind of standards I hold to with my designs. Amplifiers that have personality just like instruments do.

It’s very much about what happens between the fingerboard and baffleboard. There is a dynamic relationship between the two, and I think guitar players are looking for more agreement and less argument in that relationship. Call it what you want: tone, response or dynamics. What really matters when you plug in is that you truly make that connection.

 

 

The JOAT doesn't have conventional tone controls. IT'S ALL TONE - but you can take some away if you like.
The JOAT Series

From aesthetics to chassis layout; The JOAT series offers a truly original approach to vacuum tube guitar amplification.  For starters, there is no tone stack which also means there is no loss that comes with a conventional tone stack. The JOAT approach is to tailor the first stage gain and response characteristic via the “ATTITUDE” rotary selector along with the simple but effective “BITE” switch. 

From there we tailor the low frequency content via the “LOW CUT” rotary selector. Instead of a conventional treble pot, the “HIGH CUT” rotary selector employs a unique and effective local AC feedback network directly across the output tube plates, offering six levels of  high frequency compression/filtering.

The REVERB is unlike any other. Two tanks are employed, driven by a power pentode for massive headroom, carefully buffered at both ends so as not to load the dry signal at all. The sound of this verb is more akin to a plate than a spring with DRIVE, TONE, LEVEL and  PULL BRIGHT controls. TREMOLO goes from swamp to full stutter with ultra stable wide ranging SPEED and DEPTH controls.

REAR PANEL: IEC AC Mains Connector, Mains & High Voltage Fuses, Foot Switch Jack, Reverb Tank Connections, 4-8-16 ohm Output Load Selector, Main & Extra Speaker Jacks.

The JOAT is built on a roomy custom machined powder coated heavy duty aluminum chassis. Components: mil spec rotary selectors and pots, aircraft grade isolation mounts for the first stage 6AU6 pentode and for the dual Reverb tank design, custom spec transformers by Magnetic Components, Inc. and Mercury Magnetics. The chassis is fully hand wired with 19 str Teflon wire and stainless steel hardware is used throughout. With a painstaking process of selecting each component for optimum performance – the JOAT series amplifier delivers from Fingerboard to Baffleboard.

Model A Speaker Cabinet
2 x 12" open or closed back

3/4″ custom planed dovetail joined hardwood. See above for wood/finish/tolex options.

Recommended loaded speaker options:
Vox/Celestion Blue 12″ Alnico pair (30W cabinet rating)
Eminence/Jensen combination 12″ pair (100W cabinet rating)
(Eminence Private Jack & Jensen Electric Lightning)
Celestion Greenback/Heritage 30 12″ combination pair (50W cabinet rating)
Vox/Celestion Cream 12″ Alnico pair (180W cabinet rating)

Cabinets may be closed or open back. All cabinets come with a 4 /16 Ohm (parallel/series) selector switch and a fitted heavy duty padded canvas cover.

Model A Cabinet Dimensions: 28″w x 18″h x 12″d

Average Model A Cabinet weight with speakers:
Poplar: 46 lbs, Cherry: 51 lbs. (add aprox. 5 lbs for shipping weight).

 

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