Warm Audio WA-DI-A – Active/Passive Instrument Direct Box

The WA-DI-A from Warm Audio is a high-performance direct box designed for instrument and line-level sources, offering both active and passive operation modes.

Key Features

• Active operation with custom CineMag USA output transformer: Converts high-impedance instrument signals to low-impedance mic level, preserving tone and clarity.
• Switchable to passive mode: Allows use without phantom power or batteries, giving flexibility for different signal chains.
• Variable pad knob (-3 dB to -30 dB): Lets you attenuate high-level signals for clean integration into mixers or interfaces.
• Amp/Instrument toggle with Thru output: Send your instrument signal simultaneously to an amp and a mixer/recording device for live or studio flexibility.
• Phase-reverse and ground-lift switches: Resolve hum, buzz or phase issues when connecting complex audio systems.
• High input impedance (~1 MΩ) and mic-level balanced output (600 Ω): Suitable for guitars, basses, keyboards or any ¼″ source requiring conversion to XLR for preamps and mixers.

Customer Benefits

With the WA-DI-A, you get a professional-quality DI box that maintains instrument character while offering serious routing flexibility. Whether you’re recording direct bass or guitar in the studio, sending keyboard lines to a mixer, or routing an amp + direct feed for stage performance, the features and build quality ensure smooth, reliable integration.

Quick Specs

• Input impedance: approx. 1 MΩ
• Output impedance: 600 Ω, mic-level balanced XLR
• Pad range: Adjustable from -3 dB to -30 dB
• Power options: +48 V phantom power or internal 9 V batteries (active mode) / passive mode available
• Controls: Phase-reverse switch, ground-lift switch, Amp/Instrument switch, Thru ¼″ output

What’s in the Box

• Warm Audio WA-DI-A direct box
• User manual and documentation

Use Cases / Ideal For

Perfect for electric guitars, basses, keyboards, drum machines or other unbalanced high-impedance sources where you need clean DI conversion. Ideal for studio tracking, live stage DI feeds, amp-snake setups or integrating instruments into PA/mixer systems.

Compatibility

Connect your instrument or amp output (¼″) to the input, and balanced XLR output to a mic preamp or mixer. Use Thru ¼″ to feed your amp or monitor simultaneously. Active mode uses phantom or batteries; passive mode works without power. Works with standard studio signal chains and live audio rigs.

Pros & Cons

✅ Pros:

• Premium transformer and components deliver solid tone and signal integrity
• Active/passive flexibility accommodates many setups
• High pad range and routing options increase usability in studio and live scenarios

⚠️ Cons:

• Single channel – you need two units for stereo DI applications
• Active mode requires phantom power or batteries, which adds setup considerations

The Warm Audio WA-DI-A provides the reliability, tone preservation and flexibility needed for serious instrument routing and direct conversion.