API 512c

• 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

https://www.apiaudio.com/product.php?id=103

인풋 트랜스포머(API2516) + API2520 OP-amp + 출력 트랜스포머