Warm Audio WA-412 4-Channel Discrete Microphone Preamplifier

Four channels of vintage-inspired, discrete Class A preamplification in a single rack unit — that's the promise of the Warm Audio WA-412. Modeled after the legendary API 412 circuit, the WA-412 delivers the punchy, harmonically rich character that defined countless classic recordings, now accessible at a price that makes outfitting a full studio genuinely achievable.

Each channel features a high-quality input transformer, discrete Class A gain stage, and a wide gain range to handle everything from ribbon microphones to hot condenser sources. With +48V phantom power per channel, a high-pass filter, and a phase reverse switch, the WA-412 gives you the tools to capture any source with authority. Whether you're tracking drums, bass, guitars, or vocals, four channels of this caliber in 1U is a serious studio asset.

Warm Audio WA-412 Features

• 4 channels of discrete Class A microphone preamplification
• Inspired by the vintage API 412 circuit
• Transformer-balanced inputs and outputs
• Wide gain range for ribbons, dynamics, and condensers
• Per-channel +48V phantom power
• Per-channel high-pass filter and phase reverse
• 1U rackmount form factor
• XLR mic inputs and XLR line outputs

Tech Specs