A-Designs P1 – 500 Series Microphone Preamplifier
The The is a 500 Series microphone preamp based on the legendary Pacifica circuit — known for its rich midrange detail, fast transient response, and musical tone.
Designed to capture the same sonic signature as A-Designs’ acclaimed full-rack Pacifica preamp, the P1 offers two-thirds of its circuitry in a compact 500 Series format without sacrificing sound quality.
With custom Cinemag transformers and discrete Class A design, the P1 brings vintage console character and modern fidelity to any professional studio setup.
Key Features
- 500 Series microphone preamp inspired by the A-Designs Pacifica.
- Custom Cinemag input and output transformers provide rich, warm harmonics and depth.
- Discrete Class A circuitry for clarity, punch, and fast transient response.
- Up to 70 dB of gain – ideal for use with ribbons, dynamics, and condensers.
- Front-panel Hi-Z instrument input for bass, guitar, and keys with pure analog tone.
- 48V phantom power, phase reverse, and -20 dB pad for versatile operation.
- Open top-end and solid low-end response make it a great all-around recording preamp.
- Compact single-slot 500 Series format for modular studio setups.
- Hand-built in the USA using high-grade components and transformers.
Applications
- Vocals: Adds clarity, warmth, and natural air with effortless headroom.
- Acoustic Instruments: Brings out detail and realism with balanced frequency response.
- Electric Guitar & Bass: Captures body, definition, and harmonic richness.
- Drums & Percussion: Perfect for overheads, snares, and room mics with punch and articulation.
Technical Specifications
| Unit Type | 500 Series Microphone/Instrument Preamp |
|---|---|
| Circuit Type | Discrete Class A, transformer-balanced |
| Gain Range | Up to +70 dB |
| Input Impedance | 2 kΩ (Mic), 1 MΩ (Instrument) |
| Output Impedance | 75 Ω balanced |
| Frequency Response | 9 Hz – 101 kHz ±1 dB |
| THD + N | < 0.05% @ +20 dBu |
| Controls | Gain, 48V, Pad (-20 dB), Phase Reverse, Hi-Z Input |
| Power Requirement | Standard 500 Series rack ±16V DC |
| Format | Single-slot 500 Series module |
| Origin | Hand-built in the USA by A-Designs Audio |
Why Choose the A-Designs P1?
The The captures the sonic essence of the Pacifica preamp — open, smooth, and harmonically rich — in a compact 500 Series format.
Its combination of vintage transformer coloration and pristine Class A transparency makes it a versatile choice for any studio.
Whether you’re tracking vocals, acoustic instruments, or drums, the P1 delivers depth, warmth, and analog character that elevate every recording.
