API 312

500 Series Microphone Preamplifier with Pad circuit, polarity inversion and 48V phantom power

 899,00 ( 736,89 + VAT)


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  • API’s Classic 312 Microphone Preamp in a 500 Series module
  • Vintage Style Analog VU Meter
  • Maximum 69dB of gain
  • Traditional API fully discrete circuit design with 2520 Op Amp
  • Proprietary AP2516 Input Transformer
  • 20 dB pad switch
  • 3:1 Output Transformer Tap Selection
  • Switchable 48V phantom power
  • Peak LED
  • API’s Five Year Warranty
  • Free Shipping
  • After Sale Support
  • 2 Years Warranty
  • Secure Payments

API 312

500 Series Microphone Preamplifier with Pad circuit, polarity inversion and 48V phantom power

The 312 is one of API’s most sought after and famous mic preamps. First introduced in the 1970s, it is well known and respected throughout the recording industry, and is the building block of the modern 3124 rack unit.

Based on API co-founder Saul Walker’s original designs, the API 312 Mic Pre combines our 2520 op-amps and proprietary transformers. It delivers the analog warmth, massive headroom and unmistakable sound for which API is known, in a convenient 500 Series format.

Following the success of the hand wired 312 50th Anniversary Edition, this standard production version offers the classic API sound at an affordable price. Like all API products, the 312 is backed by API’s unique Five Year Warranty.


Gain Range: +34 dB to +69 dB (+14 dB to +49 dB with pad)
Maximum Input Level: -4 dBu (+16 dBu with pad)
Maximum Output Level: +31 dBu
Peak LED: Set to +18 dBu output level
Output Impedance: Less than 75 Ohms, transformer balanced
Frequency Response: ±0.5 dB, 20 Hz to 40 kHz
Signal to Noise Ratio: 120 dB
Connections: 15 position .156″ sp. edge connector
Power Consumption: ±16 Volts/DC @ 55 mA
Size: 1.5″ x 5.25″ x 6.75″ deep
Weight: 1.5 lbs.


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Return and restocking option is available for private customers only. We will issue a refund/credit if you are not satisfied with your purchase and notify us within 10 days of product receipt. It must be returned in the original packaging and in saleable condition and must be returned freight prepaid. Return and restocking rights are not applicable for Audio/Video and software products. Shipping and handling charges to and from are not refundable.

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