A-Designs MP-2A – Dual-Channel All-Tube Microphone Preamplifier
The A-Designs MP-2A is a premium dual-channel, all-tube microphone preamplifier designed to deliver the warmth, depth, and musical harmonics that define true analog sound.
Featuring a fully discrete Class A circuit with two 12AT7 tubes per channel and custom-wound transformers, the MP-2A delivers a rich, open tone that enhances vocals, instruments, and full mixes with stunning dimension.
Hand-built in the USA, the MP-2A has become a favorite among engineers and producers seeking vintage tube character with modern precision.
Key Features
- Dual-channel all-tube microphone preamp with Class A design for smooth, warm tone.
- Two 12AT7 tubes per channel deliver rich harmonic saturation and detail.
- Custom-wound input and output transformers by Cinemag for low noise and analog depth.
- Variable input impedance control for tone shaping and microphone optimization.
- Front-panel Hi-Z instrument inputs for direct bass, guitar, or synth recording.
- 48V phantom power, phase reverse, and -20 dB pad per channel for full control.
- Wide frequency response with low noise and extremely high headroom.
- Selectable gain structure for clean or colored tube performance.
- Balanced XLR I/O for professional connectivity.
- Hand-built in the USA for uncompromising quality and reliability.
Applications
- Vocals: Adds silky tube warmth and presence with musical saturation.
- Acoustic Instruments: Brings life and realism to guitars, strings, and piano.
- Electric Guitar & Bass: Adds vintage tube depth and body to DI or amp signals.
- Drums: Captures punch and analog warmth on overheads and room mics.
- Mix Bus or Re-amping: Perfect for adding tube glue and analog vibe to full mixes.
Technical Specifications
| Unit Type | Dual-Channel All-Tube Microphone Preamplifier |
|---|---|
| Circuit Type | Class A, fully discrete, transformer-balanced |
| Tubes | 4 × 12AT7 vacuum tubes (2 per channel) |
| Gain Range | Up to +60 dB |
| Input Impedance | Variable (150 Ω – 2 kΩ adjustable) |
| Input Type | Balanced XLR (Mic), ¼” Hi-Z (Instrument) |
| Output Type | Balanced XLR (Line Out) |
| Frequency Response | 10 Hz – 50 kHz ±1 dB |
| THD + N | < 0.1% @ +20 dBu |
| Controls | Gain, Output Level, Impedance, Pad, Phase, 48V Phantom Power |
| Power Supply | Internal universal 100–240V AC |
| Form Factor | 2U rackmount chassis |
| Dimensions | 19″ × 3.5″ × 10″ |
| Weight | Approx. 6.8 kg |
| Origin | Hand-built in the USA by A-Designs Audio |
Why Choose the A-Designs MP-2A?
The A-Designs MP-2A offers the unmistakable sonic signature of classic tube preamps — warm, dimensional, and harmonically complex — while maintaining modern reliability and low noise.
Its variable input impedance and Cinemag transformers make it a flexible tonal tool, while the dual 12AT7 tubes bring unmatched depth and character.
Ideal for everything from delicate vocals to powerful drum recordings, the MP-2A adds the organic analog life that defines timeless recordings.