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Purple Audio MC77 Limiting Amplifier

Class A Line-level Limiting Amplifier with All Discrete Solid-state Circuitry and Transformer-balanced XLR I/O
$1,850.00

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How Do You Improve On a Classic Limiting Amp?

How do you improve on a classic? In the case of the MC77, Purple Audio began by re-creating the circuit schematic of the "E" revision of the most iconic solid-state limiting amplifier in history. Off to a great start, they then spec'd modern, high-performance components matched to the original, for a pristine all-discrete signal path. The MC77 matches the functionality and lightning-fast response time of the original, but goes further with sidechain and stereo linking functionality. Bottom line: the Purple Audio MC77 can be a major asset in your quest for better-sounding recordings.

Purple Audio MC77 Limiting Amplifier at a Glance:
  • What can the MC77 do for you?
  • Top-tier performance - and a huge value
What can the MC77 do for you?

Every studio needs a good limiter, and the Purple Audio MC77 is designed after the mother of all limiters. With its lightning-fast response time and pristine, all-discrete signal path, the MC77 is your go-to device for everything from subtle, transparent dynamics control to full-on brickwall limiting. It's fabulous on bass, kick drum, vocals, you name it. It's a must-have for punchy parallel processing on drums. The MC77 also sports a sidechain input and stereo linking - two conveniences the original didn't have.

Top-tier performance - and a huge value

At Sweetwater, we're all about performance and value, and that's what the MC77 gives you. Top-notch performance, in fact, and incredible value. At this price, you can double your value and get two. With a pair of these in your rack, you can make that stereo piano sit proud in a thick track. Punch up your toms. Strap 'em across your stereo buss for some mastering magic, and juice your mix with serious slam factor. The MC77's stereo linking makes it easy. The Purple Audio MC77. Do something nice for your studio.

Purple Audio MC77 Limiting Amplifier Features:
  • A modern re-creation of the iconic solid-state limiting amplifier
  • Discrete transistor audio path electronics
  • Single-element Class A output amplifier
  • Transformer-balanced XLR inputs and outputs
  • Zener shunt regulated audio power supply
  • Compression Ratios - 4:1, 8:1, 12:1 and 20:1
  • Fast Attack Time - 20 to 800 microseconds
  • Release Time - 50 milliseconds to 1.1 second
  • Gain of 45dB (full gain with no limiting)
  • Rugged design, with PCB stiffener and chassis mounts
  • Purple-anodized aluminum front panel
  • True Bypass via sealed relay, with front panel switch
  • Stereo linking with front panel switch
  • Sidechain insert loop/key input with front panel switch
  • Buffered VU meter can monitor input or output level at +4dBu
  • LED meter lights that don't burn out
  • Heavy-gauge black cold-rolled steel enclosure
  • 155V/230V operation (switchable from rear panel)
  • 3-year warranty
Purple Audio's MC77: put a purple classic in your rack!

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Warranty Info

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Tech Specs

  • Number of Channels: 1
  • Controls: Input, Output, Attack, Release, Ratio (Buttons)
  • Ratio: 4:1, 8:1, 12:1, 20:1
  • Inputs: 1 x XLR, 1 x TRS
  • Outputs: 1 x XLR, 1 x TRS
  • Sidechain I/O: Yes (With Front-panel Switch)
  • Rack Spaces: 2U
  • Height: 3.5"
  • Depth: 8"
  • Width: 19"
  • Manufacturer Part Number: MC77

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Customer Reviews

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Rated 5/5

The best 1176 in the market

Get this instead of the UAD. It's better AND cheaper.
Music background: Mixing engineer
Rated 5/5

Can’t wait to get two of the best 1176 clones

Ok so I don"t have this yet but I"m gonna get two of them due to the fact that I just run Stereo or Dual mono tracks with eight analog inputs and outputs on my Avid MTRX which I need a review to write as well. Anyway back to the purple 77"s think about it if you have the budget then what would actually be the best option on the table? Limiting Amplifiers are to me anyway the funniest and most useful dynamic processors that I"ve come across I mean sure I have an API 2500 but frankly I"m lacking with dynamic processors. At the very least you should give purple 77"s a try
Music background: Since 1990
Rated 5/5

Solid Gold Sound!

The Purple Audio MC77 is by far the best sounding, most faithful to the original, 1176 on the market today bar none! I have the experience behind me to make that statement, and many, many other professional engineers seem to agree. The MC77 nails that vintage sound 100 percent faithfully and is built with the highest grade of components to last for years and years. Unlike a real 1176 which no two really sound alike (including the UA reissues), you can trust multiple MC77s to sound equally the same every time.
All that said, if you truly desire the magic sonic character of a vintage 1176, look no further, and just get an MC77 or two. I plan to keep my pair until my feeble fingers are no longer able to turn the knobs.
This has the genuine solid gold sound folks!!
Music background: Recording since 1969
Rated 5/5

Fantastic!

For many years in the studio I used the UREI 1176LN. I used it on remotes also and loved how transparent it was. Now the Purple MC77 has the same magic. I was not fond of the construction quality of the 1176LN. I had to repair one on a remote right before the concert started. The build quality of the Purple is excellent. I am so glad to have this in my set of gear.
Music background: Live Sound Engineer
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