The B12A Quad is a 4-channel version of the legendary 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 floor deliver cleaner sound with lower distortion, while CineMag input and output transformers keep things warm, creamy, and beefy. Two front-panel DIs impart harmonic richness to guitars, basses, and synths, while variable input gain and output attenuation give you exacting control over transformer saturation. Per-channel metering displays how hot your output signal is hitting the parallel TRS/XLR outputs, while an external power supply keeps noise out of your tracks.

Features
• 4-channel preamp with USA CineMag input and output transformers
• Designed and assembled in the USA
• Bandwidth (1kHz, 150Ω unbalanced source, unweighted): 10Hz–30kHz
• 70dB of gain handles any type of microphone, including low-output ribbons
• Per-channel gain and output controls, phantom power, polarity reverse, 18dB pad, hi-Z switch, and DI input

• Preamp Type: Solid State
• Number of Channels: 4
• Phantom Power: Yes
• Pads: Yes
• Polarity Switch: Yes
• Analog Inputs: 2 x 1/4″ (Hi-Z), 4 x XLR
• Analog Outputs: 4 x XLR, 4 x 1/4″
• Rack Spaces: 1U
• Power Source: 5-pin AC Adapter power supply (included)
• Manufacturer Part Number: B12AQUAD