Custom Tube Buffered Effects loop driver board with tube socket fully assembled and ready to install. 

Super compact design. Only 1.4"x2.4" in size. Fits easily in most guitar amps without modifications. 

Super flexible design-can be installed in multiple different ways both internally and with external access. 

6.3v or 12v filament supply either AC or DC is supported. 

Can also wire the board to a tube in your chassis and mount almost anywhere.  

Uses any 12AX7, 12AT7, or 12AU7 type tube.

Designed for use in most Tube Guitar Amplifiers.

Operates in serial and parallel modes. (switch included)

Send and Return level controls drive long cable runs and any kind of rack or pedal effect with zero loss and amazing headroom and clarity. 

Easy to install. 

Designed for amp building enthusiasts and amp technicians. 

Full kit includes:

1 fully assembled Tube Driver Board with Tube socket installed. 

2 16mm Alpha 1 Meg Audio Taper Pots.

2 MXR Small knobs. 

2 Cliff style mono switching jacks.

1 SPDT Switch

2 feet RG-316 shielded audio signal wire. 

2 feet 22AWG 600V hookup wire.

(Tube not included)

Everything you need to upgrade your existing amp or replace that solid-state unit with a real Tube Buffered Effects Loop.

You will immediately hear the difference.

This loop is completely transparent and is designed to be installed "always on".