Four Channels of Classic 312 Punch Its design inspired by a legendary vintage American console mic preamp, the API 312A, Black Lion Audio's B12A Quad 4-channel preamp packs a massive punch. With its transformer-coupled input and output stages and 70dB of gain on tap, the B12A Quad serves up heaping portions of low-noise headroom. Now you'll finally be able to use your low-output ribbon mics on quiet sources! The B12A Quad imparts a bold sonic assertiveness that beefs up any signal you pass through it. This is the sound that launched a thousand hits.Big-iron upgrades and more The B12A Quad is a 4-channel version of the company's single-channel B12A Mk2. More than just another 312A clone, the B12A Quad combines vintage-inspired sonics and modern features in a rugged 1RU chassis with a smart feature set that will satisfy the most demanding audio engineers. A revised gain stage and lower noise