12AY7 Mic Pre Discontinued - Class A Tube Microphone Preamp

Total tube performance. The 12AY7 Mic Preamp is all about dynamics with warm tone and true accuracy. Using a 200V power supply, the 12AY7 Mic Pre has a wide dynamic range and up to 50 dB of gain to boost your microphone level up to line level. Balanced XLR I/O allow it to interface into any pro recording setup while a 1/4" TRS balanced buffer out can be a splitter or aux send for monitoring. Also included are switches for phase reverse, 48-volt phantom power and low frequency filtering. To top it off, a +4 dBu LED indicator is included to help you optimize your levels. An FET current balancing circuit eliminates noise and hum allowing the tubes to amplify your microphone in a noise free environment with all the warmth and color tubes can deliver.

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Quick Specs
Dual vacuum tube performance: Electro-Harmonix 12AY7 preamp tube and 12AU7 output driver tube
Wide dynamic range, warm tone and superb accuracy
50 dB of gain into high impedance load; 40 dB of gain into 600 ohms
Full 200 volts plate power supply dwarfs the competition
Balanced XLR in and out
1/4" balanced buffered output with separate volume control
48 volt phantom power switch with soft start
Phase reverse switch
Low frequency filter switch
+4 dBu LED indicator for setting optimal levels
12AC-1200 power supply included
From the Blog
Posted 9/19/2013


Carlos Cabrera conducts a tube mic preamp comparison. Check out the EHX 12AY7 Mic Pre’s total tube performance!


From the Blog
Posted 11/30/2010


Bill Ruppert rises to the challenge in recreating one of the most respected musical instruments of the 20th century, the Modular Moog synthesizer. Using only EHX pedals, Bill reproduces analog filters, specific ADSR enveloping as well as the sweeping modulations that redefined the way people think about tonal creativity.

Please note: Bill will be in the EHX Forums to discuss his sounds, settings, and process. We hope you join us there.

Moog is a trademark of Moog Music, Inc.

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Stay tuned, more Effectology episodes coming soon!

This pedal was conceived of and designed by EHX from globally sourced components. Every EHX pedal goes through a stringent testing process by musicians and technicians in NYC before packing.

From the Blog
Posted 6/27/2008
Following their visit to the EHX factory, Au Revoir Simone sent us this quick video of the 12AY7 Mic Pre.

From the Blog
Posted 6/18/2008
Erika Forster, Annie Hart and Heather D'Angelo from Brooklyn trio Au Revoir Simone came for a visit. They loved the Small Clone, Stereo Memory Man with Hazarai, Deluxe Memory Man and the 12AY7 Mic Pre. They're going off on tour, but have promised us a video clip -- stay tuned!

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