B & K Preamplifier Mods
MC-3
Preamp Circuit board
Phono, line and power supplies are on board. Make no
mistake! This is a "State of the Art" sound. Factory installation available for the
PRO-10 and others. The OPS-8 listed below is
always recommended, and sometimes required. Some preamps require the OPS-8(see
below).
MC-3 circuit card: $299 kit (with dual mono/dual concentric
volume control). Installation is $155. Important Note:
tone controls/filters are eliminated.
For greater clarity, transparency and naturalness of Signature versions, add $175 for Line Stage/Power Supply
Signature ( includes OPS-8 or PRO-10 outboard power supply tweaks )
Add $175 extra for Phono stage Signature mods.
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Phono stage with excellent RIAA response
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Adjustable DC offset in phono eliminates need for output capacitor
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DC-Coupled line stage with very wideband performance
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Totally discrete transistor circuitry, no ICs
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Totally dual-mono construction on one board
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Dual-Mono regulated power supply
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Completely independent power and ground systems
Preamplifier Options
OPS-4B, OPS-8 Outboard Power Supply
OPS-8 is for Hafler is the outboard power supply used with the MC-3. It has
twin +30VDC and twin -30VDC output. OPS-8 is dual-mono and required for MC-3
circuit board, but PRO-10 outboard power supply can be used. OPS-8 is equipped with a large
toroid transformer and 40,000mfd of capacitance.
This power supply is large enough for a small power amplifier!!!!!!!!
OPS-4B: $229 kit (built and tested) with shielded output cable. Installation $45.00.
OPS-8: $249 kit (built and tested) with shielded output cable.
Installation:$45.00