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. Elite version includes Schottky rectifiers and Nichicon Muse capacitors.

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: $459 installed

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 $100 for Line Stage/Power Supply (includes soft-recovery rectifier mods to outboard power supply, Nichicon MUSE® caps, add $75 extra for Phono stage modifications using Nichicon MUSE® 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 Modifications