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WA12-500 MKII

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The WA12 - 500 MKII is a completely discrete, high voltage, dual-transformer microphone preamplifier designed for high gain (+71dB), high headroom, low noise, and an exciting sonic performance great for all types of recording applications.
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Raising The Volume.

A lot of preamps on the market do a good job of raising the volume of mics and instruments. Unfortunately, many pres are doing only that, raising volume.  The “Super clean” designs of today often leave the signal exiting the preamp sounding much the same as it did entering it.

If you are looking for a preamp to improve and shape your signal you will most definitely love the WA12-500 MKII. The WA12-500 MKII is designed to transform plain instruments and vocals into exciting tone.  If your mixes lack depth, struggle to sound alive, or are just missing that professional touch you’ve always wanted, there is a good chance you will love the WA12-500 MKII. 

Packed With Performance.

The WA12 - 500 MKII is a completely discrete, high voltage, dual-transformer microphone preamplifier designed for high gain (+71dB), high headroom, low noise, and an exciting sonic performance great for all types of recording applications.  A high quality mic preamp is one of the most critical pieces needed to achieve the elusive larger than life’ sound, and the WA12 - 500 MKII  is more than capable of delivering.   

The WA12 - 500 MKII is based around a discrete op-amp, the X731, which is our own reproduction of the vintage classic Melcor 1731, considered by some to be the warmer predecessor to the modern 2520-style op-amp.  The X731 can achieve vibrant, clean and lifelike tones; but can also be driven into mild saturation at much higher gain levels.  The effects can be subtle, but very pleasing to the ear.  The WA12 - 500 MKII can also accept any discrete op-amp on the market which conforms to the +/-16v, 2520 pinout standard.  


  • Utilizes premium grade input and output USA CineMag transformers.

  • 71db of Gain, fully discrete signal path.

  • Utilizes a discrete 6-pin socketed 1731 style opamp.  Can be replaced with other 6-pin "2520 foot-print" opamps for varying tone/flavor.

  • TONE button – Switches the input impedance from 600 ohms to 150 ohms.  Changes the tone of both the mic and HI-Z inputs.

  • 2 Meg Ohm True HI-Z input on front panel. Sends instrument signal through entire circuit including both Cinemag Transformers and the discrete opamp. Great for guitars, bass, keyboards and other instruments that have a 1/4″ output jack.

  • 48 volt Phantom Power.

  • Output attenuation control (after the CineMag output transformer) allows for driving the preamp and transformers into saturation.

  • LED Meter gain indication.

  • 20db pad.

When developing the WA12-500 MKII Warm Audio's ears played a big part in the design process.  Using CineMag USA transformers and an all discrete signal path ensured that the WA12-500 MKII would have the building blocks to compete with the best preamps on the market.  They are very proud to offer such a robust/professional design in a small and affordable package.


Product Details

Product Details

UPC 638142859318
Platform Hybrid (Mac and PC)
Manufacturer Warm Audio


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