API 512c Mic Pre
API 512c Mic Pre
API 512c Mic Pre
API 512c Mic Pre
API 512c Mic Pre
API 512c Mic Pre

API 512c Mic Pre

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API: 512c Mic Pre


  • 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 with 2520 Op Amp
  • Features API's unique Five Year Warranty

The API 512c is a mic / line / instrument preamp, world famous for its ability to provide a low noise (-129 EIN) and unusually good sounding front end for all types of audio applications. Sonically, it delivers the distinct API sound at an affordable price, and in the scalable API 500 Series format. Offering an impressive 65 dB of gain, the 512c includes phantom power, 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. Artfully combining those circuits with API's proprietary transformers and the incomparable 2520 op-amp, the 512c is a highly musical and rich-sounding analog mic pre, equally at home in commercial recording spaces as it is in smaller home studios. Fully featured and still hand assembled, the 512c exhibits the reliability, long life, and uniformity which are characteristic of all API products.


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,
400 K Ohms (20 K Ohms with pad)

Output Impedance:

Less than 75 Ohms, Transformer Balanced

Clipping Level:

+30 dBu

Frequency Response:

+0, -.3, 30 to 20 kHz


Equivalent Input Noise: -129, Mic In. -125, Un-Balanced In.
Actual Metered Noise: Mic, -95 dBu, Un-Bal., -90 dBu


Less than .05% @ +4 Out, Less than .1% @ +28 Out

Power Consumption:

±12/18 Volts/DC, @40 ma.


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.


Shipping costs are calculated at time of checkout by our shopping cart, based on the weight of your order and the method of shipment.

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