compressor pedal schematic 12AU7 Compressor

compressor pedal schematic 12AU7 CompressorThe 12AU7 COMPRESSOR is a boutique all analog vacuum tube pedal designed to offer the most transparent compression available, providing sustain without sacrificing articulation. Its feed forward side chain and custom opto resistive attenuation produces a soft knee, as opposed to hard limiting, providing a very natural presentation without pumping effects. This will be your always on pedal with tons of clean headroom. It doesn't change your tone, only

The 12AU7 COMPRESSOR is a boutique all-analog vacuum tube pedal designed to offer the most transparent compression available, providing sustain without sacrificing articulation. Its feed-forward side-chain and custom opto-resistive attenuation produces a soft knee, as opposed to hard limiting, providing a very natural presentation without pumping effects. This will be your always on pedal with tons of clean headroom. It doesn't change your tone, only the feel of your rig. Works on bass too!

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Specifications

• True bypass
• 1 x 12AU7, all analog circuit
  
• 25Hz to 10kHz bandwidth
• 0.2% distortion @500mV
• 22dB maximum gain
• Custom opto-resistive attenuator
• Feed-forward sidechain for soft knee
• 50ms attack time
• 1Vrms input, onset of clipping
• 3Vrms maximum output
• 150V tube supply
• +12V @ 300mA (center positive)
• 4.7" x 3.7" x 2.1"

Downloads

• User Manual

Videos

Testimonials

• "After a month with your 12au7 Compressor, I thought it was time to shoot a quick message and say thank you again and what a terrific circuit. I genuinely dig this compressor more than any I’ve owned."
• "I think your compressor is great. Quiet, soft, real nice. It’s kicked the Pettyjohn compressor off the board for the next good while, which is high praise in my book."
• "I just wanted to let you know I’ve really been enjoying the 12AU7 compressor. It’s definitely my ‘always’ on pedal and sounds fantastic! You do great work and I appreciate your attention to detail and the exceptional build quality."
• "I love the pedal. It adds just what I need in clean sustain without the signal sounding unnaturally processed. Thanks for building a great product."
• "Received the 12AU7 Compressor and what a piece of kit it is. You are a very talented chap."
• "Holy WOW, it's absolutely amazing. Exactly what I was looking for...smooth, easy, quiet, like a magic silk carpet, seriously! Definitely ALWAYS ON for dirt or clean and everything in between."
• "I got my comp today and instantly fell in love with it. It came quickly also. I can't wait to play it live with a few gigs this week. And then the studio next week. What a gifted man you are to have created this gem. Thank you for your design it is fabulous."
• "I just got my compressor back, it sounds even better than before the mod. It is dead quiet at full tilt and so as smooth as can be. The effect is subtle and not in your face, it not only compresses but it makes the bass sound remarkably better without changing its tone and character. It’s hard to describe the evenness it brings to the instrument and I couldn’t be more pleased. This a set, forget and always on pedal for me."
• "Much better than the Boss CS-2, that I’ve used for years. I would recommend this pedal to anyone that wants a Compressor that has a softer sound to it, this pedal accomplishes that... If you're looking for a device that provides Compression, this is your company... Yet Another Great Pedal to come out of Hagerman Technology... Finally a pedal company that knows what it’s doing..."
• "I got the new comp today, it’s great!!! I had a chance to put it through its paces using my AKG studio phones. It’s totally dead quiet at any setting and the EQ is intuitive like a tone control on a passive bass. Full is flat and as you turn it back, it just gradually rolls off the highs. It doesn’t not pump or breathe whatsoever and the compression is effective from zero to full. This is one fine pedal."