Warm Audio WA-MPX/2MPX Tube Mic Preamp

Bring your recordings to life with the Warm Audio WA-MPX or WA-2MPX Tube Mic Preamp. Inspired by the gear that shaped the golden age of music, this preamp gives your sound that smooth, rich vibe heard on classic records. Whether you're recording vocals, guitars, or mixing tracks, the WA-MPX adds warmth, depth, and character that instantly feels vintage—but still hits hard in modern mixes. If you're chasing that legendary tape-era tone, this is the real deal.

Warm Audio WA-MPX/2MPX Tube Mic Preamp Review

The Warm Audio WA-MPX and WA-2MPX are carefully built recreations of the vintage 351-style tube preamps used on iconic recordings by artists like Elvis and Nat King Cole. Each channel features handwired circuitry, three vacuum tubes, and custom USA-made CineMag transformers. These preamps deliver up to 90dB of gain, making them a perfect match for both high-end condenser mics and low-output ribbon mics. With tape saturation, tone shaping, and filtering built in, you get everything from clean and clear to saturated and punchy. It's a smart choice for anyone looking to add timeless analog tone to their setup.

What’s the Difference Between the WA-MPX and WA-2MPX?

The key difference between the Warm Audio WA-MPX and WA-2MPX models is the number of channels. The WA-MPX is a single-channel tube mic preamp, ideal for solo recordings like vocals or individual instruments. It’s a great fit for smaller setups or anyone who only needs one high-quality input. The WA-2MPX, however, includes two fully independent channels in one unit, making it perfect for stereo sources, dual-mic setups, or recording multiple tracks at once. Both versions feature the same handwired design, custom CineMag transformers, three premium tubes per channel, and all the same tone-shaping tools—including tape saturation, high/low-pass filters, and the signature Warm Audio tone control. If you only need one channel of rich, vintage tone, the WA-MPX gets the job done. If you want more flexibility or plan to track more than one source at a time, the WA-2MPX is the better choice.

Warm Audio WA-MPX/2MPX Tube Mic Preamp Features

• Adds vintage-style warmth and fullness to your recordings
• Built-in tape saturation gives a smooth, classic sound
• Tone control lets you brighten up darker microphones
• Boost switch gives extra volume for quiet sources or mics
• Easy-to-use filters help cut unwanted bass or harsh highs
• Strong metal build with retro-style knobs for a classic look

Warm Audio WA-MPX/2MPX Tube Mic Preamp Specs

• Delivers up to 90dB of all-tube analog gain using two 12AX7 and one 12AU7 tubes per channel
• Custom large-core CineMag USA transformers for bold, rich sound
• Tape saturation uses a discrete diode ladder circuit to simulate 15 IPS tape compression
• Includes 48V phantom power, polarity switch, and XLR, TS, and TRS inputs and outputs
• Single unit depth is 6.25 inches; dual channel unit depth is 8 inches
• Switchable 80Hz high-pass and 2kHz low-pass filters
• Internal IEC power supply, switchable between 115V and 230V