Melodium P22T Rack

The MELODIUM P22T Rack Version is a professional 2-channel tube microphone preamp in a 2U rack format featuring fully balanced transformer-coupled circuitry, push-pull output stages, dual 12AX7 and single 12AU7 tubes per channel, selectable 50 and 200 ohm input impedance, and over 80 dB of gain for high-resolution, low-noise recording across all microphone types.

Classic Tube Character with Modern Precision

The MELODIUM P22T Rack Version draws direct inspiration from the revered Ampex 351 preamp topology while integrating contemporary engineering to meet modern studio demands. The design delivers the harmonic richness, saturation behaviour, and transient response associated with vintage valve circuitry, while maintaining exceptional clarity through ultra-low noise architecture and a tightly regulated power supply. This combination allows engineers to capture both subtle detail and dynamic intensity without compromise.

Fully Balanced Transformer Architecture

The unit employs a fully balanced signal path with high-quality input and output transformers, ensuring optimal signal integrity and strong common-mode noise rejection. The push-pull output stage enhances headroom and stability, allowing the preamp to handle both delicate sources and high sound pressure levels with equal precision. This architecture supports consistent tonal balance across the entire frequency spectrum while preserving the natural character of the source.

High Gain Performance and Dynamic Control

With more than 80 dB of available gain, the P22T accommodates a wide range of microphones, including low-output ribbon designs and dynamic microphones that require significant amplification. The gain structure enables precise control over signal level while maintaining low distortion, making the unit suitable for critical recording scenarios where detail and depth remain essential.

Optimised Impedance Matching

The selectable input impedance of 50 and 200 ohms allows engineers to tailor the electrical interaction between the preamp and the microphone. This flexibility ensures optimal tonal response when pairing with vintage ribbon microphones or modern condenser designs, enhancing frequency response, transient accuracy, and overall sonic character.

Valve Configuration and Tonal Shaping

Each channel incorporates two 12AX7 tubes for voltage gain and one 12AU7 for output driving, creating a harmonically rich signal path with controlled saturation characteristics. This configuration supports both clean amplification and subtle harmonic enhancement, enabling engineers to shape recordings with musical warmth and depth without sacrificing definition.

Professional Build and Reliability

The P22T Rack Version features a robust 2U rackmount chassis designed for demanding studio and live environments. Handcrafted in France using high-grade, locally sourced components, the unit reflects a commitment to precision manufacturing and long-term reliability. The regulated power supply stabilises performance, ensuring consistent operation across varying conditions.

Application Versatility

The preamp supports a broad range of recording applications, from capturing vocals and acoustic instruments to handling ambient recordings and high-level sources. Its ability to deliver both transparency and character makes it suitable for engineers who require flexibility in tonal shaping without introducing unwanted noise or artefacts.

Why Choose the MELODIUM P22T Rack Version

• Achieves studio-grade recordings with clarity, depth, and controlled harmonic warmth
• Handles ribbon, dynamic, and condenser microphones with equal authority
• Adapts easily to different recording scenarios through impedance flexibility
• Preserves transient detail while adding musical character where required
• Delivers consistent, low-noise performance in critical recording environments
• Supports both subtle enhancement and bold tonal shaping in professional workflows

• 2-channel tube microphone preamp in 2U rack format
• Fully balanced circuitry with input and output transformers
• Push-pull output stage
• Two 12AX7 and one 12AU7 tube per channel
• Greater than 80 dB gain
• Selectable input impedance of 50 and 200 ohms
• Ultra-low noise design
• Regulated power supply
• Compatible with ribbon, dynamic, and condenser microphones
• Handcrafted construction using premium components

This item, like everything we supply, comes with the complete support of our expert team. Our excellent technicians have been specifying, building and supporting studios for over twenty years. If you have any problems with installation, setup or everyday use, they’re never more than a click away, and always happy to help.

You can contact them here.