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| For sale |
| Our Price : |
1650.00 US |
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| Purple Audio MC77 |
| Rental prices ($USD) |
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/ day |
Total |
| 1 day |
42.05 |
42.05 |
| 3 day |
28.03 |
84.09 |
| 5 day |
21.02 |
105.10 |
| 12 day |
14.02 |
168.24 |
| 28 day |
9.01 |
252.28 |
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Purple Audio MC77
The MC77 supercedes the MC76 re-engineered 1176 type FET Limiter. The MC77 recreates the audio circuitry of the revision E 1176, using modern components matched to the original.
One significant component is the input attenuator. The input attenuator that was custom made for the original revisions A-F 1176 and for the Purple MC76 by Clarostat was discontinued in 2002. It was a J series T-pad attenuator with two 600 Ohms "build out" resistors to keep a constant 600 Ohms load on the source and primary of the input transformer. Clarostat changed carbon manufacturers and the new carbon manufacturer was unwilling or unable to make the part. Purple temporarily stopped making the MC76 to find a solution. We tried several three deck Clarostat 70 series pots in different configurations to achieve the same loading and to match the taper. We found a solution that matched the original; both the originals and replacement parts are drawn in the schematic that you can download below. At the same time, we looked at feedback gathered from the hundreds of satisfied MC76 users. Based on that feedback, we incorporated useful new features into the revised unit, which was designated the MC77.
New Features in the MC77
True Bypass via sealed relay with front panel switchImproved stereo linking with front panel switchSidechain insert loop or key input with front panel switchBuffered VU meter can monitor input or output level at +4dBuLED meter lights that don't burn out as incandescents doHeavy gauge black stainless steel enclosure115v/230v operation switchable from rear panel (serial# 600)
Features inherited from the MC76
Discrete Transistor Audio Path ElectronicsSingle Element Class A Output AmplifierTransformer Balanced XLR Inputs and OutputsZener Shunt Regulated Audio Power SupplyCompression Ratios - 4:1, 8:1, 12:1 and 20:1Fast Attack Time - 20 microseconds to 800 microsecondsRelease Time - 50 milliseconds to 1.1 secondGain of 45dB (full gain with no limiting)Ruggedized Design - PCB stiffener, chassis mount transformersPurple Anodized Aluminum Front Panel3 Year Warranty*
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