API 512C Mic & Line Preamp 500 Series Module

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API Mic Preamp with 65 dB of gain

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Manufacturer: API

Category: Recording & Playback

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The API 512c is a mic / line / instrument preamp designed to provide a low noise, unusually good sounding front end for all types of audio systems. Sonically, it offers the distinct API sound at an extremely affordable price. Offering low noise (-129 EIN) and 65 dB of gain, the 512c includes phantom power, and switchable polarity, -20 dB pad and Mic or Instrument/Line selector. Front panel XLR and 1/4 inch connectors combined with rear panel mic access allows for additional flexibility when installed into an API lunchbox®, API's 10 position 500V vertical rack, or an API console.

The API 512c remains faithful to the circuit designs of API's founder, Saul Walker. Fully featured and still hand assembled, the 512c carefully preserves the original sound character that made it so much a part of the early days of recording. Offering high headroom and a wide variety of inputs and input access points, it is equally at home in the commercial recording studio as it is in the home project studio.

The 512c Mic/Line Preamp makes use of the 2520 op-amp and therefore exhibits the reliability, long life, and uniformity which are characteristic of all API products.

  • Mic Preamp with 65 dB of gain
  • Front and Back Panel Mic Input Access
  • Line/Instrument Preamp with 45 dB of gain
  • Front Panel Line/Instrument Input
  • LED VU meter for monitoring output level
  • 20 dB pad switch, applies to mic/line/instrument
  • 48v Phantom switchable power
  • Traditional API fully discrete circuit design
  • Uses the famous API 2520 Op-Amp

Additional Info

Additional Info

  • Rear Connector: Output on edge connector, MIC Input on edge connector, can be defeated
  • Front Connectors: XLR MIC Input, HI-Z 1/4" Unbal Input
  • Gain Range: MIC: 34dB to 65dB (14dB to 45dB w/PAD). HI-Z: 14dB to 45dB (-6dB to 25dB w/PAD)
  • Maximum Input Levels: MIC, +8 dBu, Unbal HI-Z Input, +36 dBu
  • Input Impedance: MIC Input, 1500 Ohms (150 Ohm mic), HI-Z Unbal Input, 20 K Ohms
  • Output Impedance: Less than 75 Ohms, Transformer Balanced
  • Clipping Level: +30 dBu
  • Frequency Response: +0, -.3, 30 to 20 kHz
  • Noise: Equivalent Input Noise: -129, Mic In. -125, Un-Balanced In.
  • Actual Metered Noise: Mic, -95 dBu, Un-Bal., -90 dBu
  • Distortion: Less than .05% @ +4 Out, Less than .1% @ +28 Out
  • Power Consumption: ±12/18 Volts/DC, @40 ma.
  • Size: 1.5" X 5.25" X 7" Deep
  • Size (Boxed for Shipping): 4.5" X 6.5" X 10.25"
  • Actual Weight: 1.41 lbs.
  • Shipping Weight: 1.94 lbs.
Manufacturer's Part Number 512C
Manufacturer API
also known as API 521C Mic Peramp, API 512C 500 Series Module
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