Warm Audio WA-DI-P – Passive Direct Box for Instruments

The WA-DI-P from Warm Audio is a high-quality passive direct box designed for connecting electric guitars, basses, keyboards or other line-level instruments to microphone preamps or mixers. Built with premium components and rugged construction, it delivers clean signal conversion and flexible control.

Key Features

• Custom-wound CineMag USA output transformer: Converts high-impedance instrument signals to balanced low-impedance mic level, preserving tone and clarity.
• Variable pad from –3 dB to –30 dB: Allows fine control of input level to prevent distortion with loud or active-pickup instruments.
• Ground-lift switch and phase-reverse switch: Resolves hum or phase issues when connecting to various audio systems.
• Thru-put jack and Amp/Instrument toggle: Lets you feed your instrument signal to both the DI output and your amplifier or another destination simultaneously.
• Wide frequency response (20 Hz-70 kHz) and high input impedance (1 MΩ): Handles various sources with precision and minimal coloration.

Customer Benefits

The WA-DI-P offers a professional-grade DI box that retains the authentic tone of your instrument while providing the flexibility and control needed for recording and live performance.

Quick Specs

• Type: Passive direct box
• Pad: Variable –3 to –30 dB
• Input impedance: approx. 1 MΩ
• Output impedance: 600 Ω, mic-level balanced
• Frequency response: 20 Hz – 70 kHz (±0.5 dB)
• Channels: 1 input, 1 XLR output + ¼″ Thru output

What’s in the Box

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

Use Cases / Ideal For

Ideal for electric guitar, active pickup bass, keyboards or any high-impedance source that needs conversion to mic-level for recording or live mixing. Also useful for sending one instrument to both an amp and a mixer simultaneously.

Compatibility

Connects via ¼″ instrument or amp output to the DI box input, then balanced XLR to mic preamp or mixer. No power required for passive operation, making it easy to incorporate into live or studio rigs.

Pros & Cons

✅ Pros:

• High-end transformer and components for premium tone
• Flexible pad, ground-lift and phase controls enhance usability
• Durable, road-friendly metal build

⚠️ Cons:

• Passive design means lower head-room than some active DIs for very low output instruments
• Single-channel unit—need two for stereo or multi-channel routing

The Warm Audio WA-DI-P is a no-compromise passive direct box crafted for serious instrument connections, offering tone preservation, control and reliability in one rugged package.