Automated Processes, Inc. (API) was founded in 1968 by Saul Walker and Lou Lindauer. Their vision was to create a high quality microphone preamp that would meet the needs of audio professionals in the music and broadcast industry. In 1969, API created the first modular designed mic pre, and developed state of the art technology using conductive plastic faders. Soon, API became the leading audio broadcast console manufacture for radio and television. Recording studios all around the country began using, and loving, API mic pres. Today, 30 years later, many of the consoles are still being used. Prestigious recording studios around the world rely on API's design and technology because there are few consoles that offer the same quality sound, at a cost-effective price.
![]() Api Dsm 48 Discrete Summing Mixer US $10,000.00
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![]() Api 512c Rack Of Ten With Power Supply US $7,150.00
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![]() Api 560 Graphic Eq Auction Is For One Module US $650.00
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![]() Api 550a Three Band Eq Auction Is For One Module US $875.00
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![]() Api 500 Vrp10 Slot Rack With Power Supply US $675.00
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![]() Clean Original Api 550a Eq Recapped Tested Warranty US $1,500.00
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![]() Api Brent Averil 312 Mic Preamps US $1,200.00
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![]() Api 8200 2 Priced To Sell US $1,200.00
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![]() Api 500 Series Rack US $425.00
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We are always updating our Microphone Preamp selection. Check back often.


US $10,000.00







