12AY7 Mic Pre

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-1000 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!


Posted 11/30/2010

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

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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