MARQUETTE AUDIO LABS

* Since 1994 *

Purple Audio MC77 Limiting Amplifier

Purple Audio MC 77  front view
After a brief hiatus Purple Audio is making the MC77 again. The input attenuator that was custom made for the original units and for Purple Audio by Clarostat has been discontinued. The original part was a J series T-pad attenuator with two 600O "build out" resistors to keep a constant 600O 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 Audio took some time to find the right replacement part. Once Purple Audio tested out the replacement choice and found that it met Purple's requirements, they started making the units again. Purple Audio tried several three deck Clarostat 70 series pots in different configurations to achieve the same loading and to match the taper.

Purple Audio's MC77 is BY FAR the best way to go if you are looking for "THE 1176LN SOUND". This unit has the integrity of the CLASSIC Urei 1176LN but DOES NOT have the inconsistencies from unit to unit, the "noise" or other problems of the vintage units that are available. More importantly, the MC77 is also BY FAR the BEST new product of its type on the market today as well. This is the only one I would feel comfortable SELLING and most of all OWNING (which I do)." ~ David Marquette


The MC77 replaces the MC76 (re-engineered 1176 type FET Limiter).
After selling hundreds of the original MC76 units, Purple Audio incorporated new features based on user feedback.

NEW Features:

True Bypass with front panel switch
New Stereo Link with front panel switch
Sidechain insert loop - key input, with front panel switch
Buffered VU meter switchable to monitor input or ouput level at +4dBu
LED Meter lights
Heavy Gauge Black Painted Steel Enclosure

Standard Features:

Audio Path Discrete Transistor Electronics
Transformer Balanced XLR Inputs and Outputs
Zener Shunt Regulated Power Supply
Single Element Class A Output Amplifier
Compression Ratios 4:1, 8:1, 12:1 and 20:1
Fast Attack Time 20 microseconds to 800 microseconds
Release Time 50 milliseconds to 1.1 second
Gain 45dB (full gain with no limiting)
Purple Anodized Aluminum Front Panel
120/240 volt operation Internally Selected
3 Year Warranty*