Lazy J J20 Tweed Amp with Reverb 2019

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WINNER Guitar Awards 2010 - Best guitar amp
Based on a late 50s classic that has helped define the voice of Rock & Roll.

This amp is a 2 channel, hand build, point to point wired amp, which delivers ca. 18 Watts into a 12”, 8 Ohm, Celestion Alnico Blue Speaker. The cabinet is built from finger jointed pine and covered with hand aged, lacquered tweed.

The 2 channels are marked Normal and Bright with a Volume control for each one. The Tone control affects both channels equally.

Looking at the 4 inputs from the back of the amp, the 2 on the right are for the Normal Channel and the 2 on the left are for the Bright Channel.
Both inputs labeled 1 are higher gain than the ones labeled 2.

The interesting thing is that the both Volume controls are interactive. The Volume of the Channel you’re not plugged into has an effect on the tone/tightness of the Channel you are plugged into. In other words, if your guitar is plugged into the Bright Channel, the Normal Channel Volume affects the way the Bright Channel responds. This is subtle, but definitely audible. With the Bright Volume turned up to any given setting, and the Normal Volume off, you hear the sound of the Bright Channel alone…by turning the Normal Channel up about halfway, you hear an increase in low mids. By turning the Normal Volume up to 10, the bottom end will tighten up…from 10 – 12 the sound will get choked, compressed and become quieter. This can be used to get interesting tonal variations from the amp.

The amp is set up with a 5Y3 rectifier and a pair of 6V6s in the power amp, and uses 1x 12AX7s 1x 12AT7. However, for a different feel and character, the amp will take a GZ34 rectifier and a pair of 6L6s without the need of re-biasing.

The Variable Attenuation Control (VAC) allows the user to dial seamlessly from full output down to ca. 5 Watts while retaining the amps character all the way along.

It comes with Lazy J Reverb module.
It is a tube driven reverb circuit with a full size reverb tank, adding another dimension to the amp. The reverb circuitry and controls are housed in a small enclosure that is mounted to the inside of the cabinet, on the right hand side, looking at the amp from the back. The controls, Reverb Volume and Reverb Tone, are easily accessible. The module is supplied with a Cut Off footswitch.