API 512c – single-channel discrete mic / line / instrument preamp in 500 Series format. The original modular API preamp, still built around Saul Walker's circuit with the 2520 op-amp and API's own transformers.

• Mic preamp with up to 65 dB of gain, continuously variable

• Line/instrument preamp with up to 45 dB of gain

• Very low noise: –129 dBu EIN; transformer-balanced output, under 75 Ω

• Front panel XLR mic input and 1/4" Hi-Z instrument input

• Rear mic input on the edge connector as well, internally selectable

• Switchable 48 V phantom, polarity reverse, –20 dB pad (applies to mic, line and instrument)

• 7-segment LED VU meter, –12 to +18

• Single 500 Series slot – works in an API lunchbox, 500V rack or any compatible frame

Serial number: 20363-21 (see photos).

Condition: excellent

I have a second identical 512c for sale. If you want a stereo pair for overheads, room mics or any stereo source, message me before buying and we can sort out a deal on both.

Ships from Poland, double-boxed. Local pickup in Warsaw available. Happy to answer questions or send more photos.