Sunn Concert Lead/Bass preamp pedal (KONSERT)

KONSERT.  A preamp in a pedal, based on the preamp of the Sunn Concert amplifier (Lead / Bass).
The circuit of this pedal is a replica of the preamp used by Sunn for the Concert Lead and Concert Bass amplifier. The original schematics were used and a couple of more features were added to make it more versatile. Volume, Boost and Distort and EQ functions are exactly set (circuitwise) as in the original circuit.

Internally, an extra power supply circuit was added in order to provide the necessary dual rail supply voltages that the original premp was using. All you need is the typical 9V power supply you use for your pedals.
 Added features:
  • Instrument Out. Use this output to connect the preamp to your pedals.
  • Line Out. Use this output to connect the preamp directly to a power amp.
  • XLR Out. Balanced output for connection with audio consoles etc.
Knobs & switches:
  • D: Drive gain
  • V: Volume
  • B: Bass
  • M: Mids
  • T: Treble
  • Brite toggle switch: Change the input setting Normal/Brite.
  • Treble Boost toggle switch: Brighten your sound even more.
  • Left footswitch: It acts as a bypass for the Instr.-Out and as a mute for the Line-Out and the XLR-out.
  • Middle footswitch: Boost ON/OFF
  • Right footswitch: Distort ON/OFF
 
▹ Voltage Required: DC 9 Volt
[Do not exceed recommended voltage! It may damage the circuit.]
▹ Polarity: Negative tip  
▹ Current consumption: 65mA
▹ Weight: ~450gr
▹ Enclosure dimensions: 95 x 151 x 35 mm (3.74 x 5.95 x 1.38 in)