ART Pro MPA III 2-Channel Multi-Voice Tube Microphone Preamp

The ART Pro MPA III packs two channels of genuinely versatile preamplification into a rugged 2U rack unit. Discrete Class A FET input stages feed a switchable signal path: engage the 12AT7 vacuum tube for warm, harmonically rich character, or select the clean solid-state voicing for transparent, extended response out to 120 kHz. It is two distinct preamps in one box — and at this price point, one of the best-value front ends in project and professional studios alike.

Each channel accepts XLR microphone or 1/4" instrument sources, with variable input impedance from 600 ohms to 80 kilohms that dramatically changes how dynamic and ribbon mics load and bloom. A Character switch adds frequency enhancement, while low-cut filters, phase invert and +48V phantom power cover every session need. Classic analog VU meters keep levels in view, and balanced XLR and 1/4" outputs with selectable +4 dBu / -10 dBV operation interface with any console or interface.

Features

• Two channels of discrete Class A FET preamplification, up to 70 dB gain
• Voice switch: warm 12AT7 tube or clean solid-state signal path per channel
• Variable input impedance (600 ohms – 80 kilohms) for mic tone shaping
• Character switch, low-cut filter, phase invert, +48V phantom power
• Analog VU meters; balanced XLR and 1/4" outputs; +4 dBu / -10 dBV operation
• Universal internal power supply (100–240V)

Technical Specifications

• Maximum gain: 70 dB
• Frequency response: 15 Hz – 48 kHz (tube), 15 Hz – 120 kHz (solid state)
• THD: <0.005% typical; EIN: -128 dBu (A-weighted)
• Max output: +27 dBu balanced
• Dimensions: 3.5" x 19" x 8.75" (2U rack); Weight: 10.5 lb
• UPC: 840402050988

What's Included

• ART Pro MPA III preamplifier
• Power cable