API 312 Microphone Preamplifier

The API 312 is a 500 Series mic preamp based on the original 1970s design, featuring the 2520 op-amp and API transformers. It delivers warm, punchy tone with high headroom and is a standard version of the 50th Anniversary Edition, offering classic API sound at an affordable price.

API 312 Microphone Preamplifier

The API 312 is one of the most iconic and sought-after microphone preamps in professional audio, originally introduced in the 1970s and widely regarded for its punchy, warm, and detailed sound. Serving as the foundation for the modern API 3124 rack unit, the 312 has earned its place in countless studios and on countless records.

Built around Saul Walker’s original design, the API 312 features API’s discrete 2520 op-amp and custom transformers, delivering high headroom, fast transient response, and the classic API character in a compact 500 Series module. This version follows the highly regarded hand-wired 50th Anniversary Edition, offering the same legendary tone in a standard production model at a more accessible price point.

As with all API products, the API 312 is hand-assembled in the USA and backed by a five-year warranty, ensuring long-term reliability and consistent performance.

Features

  • 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

Specifications

  • 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 75Ω, transformer balanced
  • Frequency response: ±0.5 dB, 20Hz to 40kHz
  • Signal to noise ratio: 120 dB
  • Connections: 15-position .156″ edge connector
  • Power consumption: ±16 VDC @ 55 mA
  • Dimensions: 38mm x 133mm x 171mm
  • Weight: 0.68 kg

User Manual

Download the User Manual in PDF format.

Ordering

SKU API312 Categories , , Tag

$1,498 Inc GST

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