Adcom Preamplifiers
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.
GPX mod (for 555/565 preamps) or GTX mod (for tuner/preamps) mod is only $229/installed, $429 for Signature version
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.
Volume
control not included since the excellent Noble volume control is used in these
preamps. Important Note: tone controls and filters are eliminated.
Signature Versions:
add $175 for Line
Stage/Power Supply (includes Schottky rectifier mods to outboard power
supply, BlackGates® caps and alternate bypass caps in line stage)
add $175 extra for Phono stage
modifications using BlackGates®.
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