Sunday Sis Prototype (Cleans Up Well) | Modified AA764 Champ Circuit

This originally started out as one of my Lil' Sis Desktop models with an added master volume just before the output stage.  Long story short - it sounded not great since much of the tone of tweed amps come from driving the output tube.  With a hole in the top of the chassis I to come up with something that could work and sound fantastic. And this is it - a tastefully modified AA764 Champ circuit int a small portable footprint.

The controls on the front panel are treble and bass with the volume on the top surface between the tubes.  Just above the input jack is a 3-position mids switch that takes the fixed mids resistor from stock (far right) to very scooped on the far left.   The rear panel has the  8 ohm speaker jack and 3-position negative feedback switch with stock value in the "up" position, reduced NFB in the middle, and no NFB in the down position.

Because of the added tone shaping switching options this amp is extremely versatile without causing option paralysis where you spend more time flipping switches than playing.  Each setting is useful and offers a meaningful change.  From ultra pedal-friendly to very near tweed-ish raw mid-forward tones.  Sounds very big and full with a 12" speaker.

This is a small amp "head" occupying a roughly 7.5" x 7.5" footprint (+ ~2" for handle) is built in a Hammond Diecast Aluminum chassis - CNC cut in-house for perfect fit and finish.  Component lists as follows:

• AES Power Transformer
• AES 5W 8 Ohm Output Transformer
• In-House CNC Cut Heavy Duty 2mm Turret Boards
• High Quality Nickel Plated Copper Turrets
• JJ 12AX7 Pre-amp Tube
• JJ 6V6S Output Tube
• Fused IEC Socket (5 x 20 mm 1A Slo Blo)
• Belton Tube Sockets
• CTS Custom Taper Potentiometers
• Switchcraft Jacks
• Carling Switches
• MOD Power Supply Capacitor Kits
• Mallory 150 Coupling Caps
• Weico 22 AWG Tinned Stranded Wire

Comes complete with compatible IEC power cable.

Warranty: Each Barbeaux Amplifier comes with a 2-Year Warranty (Parts & Labor Only) from date of delivery against any manufacturer defects - excluding tubes.