Adcom Preamps and Tuner/Preamps

 

 

We  modify existing circuit boards with changes in power supply caps, bypass caps, Op-amps, coupling caps, etc. Customers have been delighted with the more open, liquid and tube-like sound quality.

 

 

 

 

 

 

MC-3 Preamp Circuit Board

 

Phono, line and power supplies are on board. Make no mistake! This is a "State of the Art" sound. The MC-3 fits Adcom preamps - not tuner/preamps. Factory installation is available. The OPS-8 listed below is usually required.

 

MC-3 circuit card: $299 kit (with dual mono/dual concentric volume control). Installation $155.  

Note: Volume control not included since the excellent Noble volume control is used in these preamps. Important Note: tone controls and filters are eliminated.

 

Elite Versions:  

add $125 for Line Stage/Power Supply (includes soft-recovery rectifier mods to outboard power supply, Silmic II® caps and alternate bypass caps in line stage)

add $75 extra for Phono stage modifications using Silmic II® caps

 

 

Preamplifier Options

 

OPS-4B, OPS-8 Outboard Power Supply

 

For your B&K preamps and others. OPS-4B features one +30VDC and one -30VDC output. OPS-8 Features dual + 30VDC outputs for use with MC-3. Each has a large toroid transformer and 40,000ufd of very high quality capacitors. Signature versions of this power supply have Schottky rectifiers. 

 

This power supply is large enough for a small power amplifier!!!!!!!!

 

OPS-4B: $229, OPS-8: $249.00/kit

 

 

 

 

 

 

Adcom Preamplifier Mods