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The Duality40 is the third step up in power rating in the Duality Series. It offers more headroom and openness than the Duality20 and 30 due to its larger bottle tubes. While only 40 watts, this amp makes a bold statement. The amp, as with all models in the Duality Series, has a complete and versatile feature set. Each of the two foot-switchable channels has a level control for two different stages of the preamp, enabling you to dial in just the right amount of gain from each. That, combined with individual Master Volume Controls for each channel, will enable you to perfectly balance your Normal and Drive tones. There is also a foot-switchable FET gain boost with a variable Gain control that will allow you to push each channel even further. It’s like having a clean boost pedal in the front of your amp, but it’s already built in! Then there’s the A.B.E. Control. This three position rotary control will let you change the tone control characteristics to fine tune the amp to best compliment any gig. Need a clean, funky tone? Set the switch to “A” for a more American sounding amp with the typical associated scoop in the mids and limber up that wrist. Next gig needs a Classic Rock tone? Set the switch to “B” for a more British flavor and break out the Union Jack. Another gig with a Fusion Blues theme? No problem. Set the switch to “E” for the typical EAST tonality and dig in as deep as you wanna’ go! And finally, some aggressive higher gain, scooped mid melodies? You got that too. Just set the Control to “A”, crank the Bass and Treble and cut the Mids and you’re on your way to Metalville. All this versatility coupled with the global Bass, Mid, Treble and Presence Controls and the Duality will become your go-to amp. The Duality40 is definitely suited for mid-sized to larger venue gigs and the quad of 6V6 output tubes will generate full bodied tones, while putting enough air around your notes to make you really feel what you’re playing.  

Feature Set

Front Panel:

Input Jack            

BoberFET Gain control

BoberFET engage switch                                 

BoberDrive Drive control             

BoberDrive Volume control

Normal / BoberDrive Channel switch                      

Normal Gain control

Normal Volume control

Treble, Middle, Bass global tone controls

A B E Voicing switch (American, British, EAST)

BoberDrive Master Volume control

Normal Master Volume control

Global Presence controls

Rear Panel:

AC input / Fuse block

On / Off switch

Play / Rest switch

4-8-16 Ohm Impedance switch

Speaker jacks – 2 in parallel

Effects Loop Send jack

Effects Loop Return jack

Foot Switch jack (for dual foot switch with LED)

Tube Compliment:


3 – 12AX7 preamp tubes

4 – 6V6 output tubes

Solid state rectifier


Line Cord

Dual foot switch with LED’s


Available as a Head,1x12 combo or 2x10 combo

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