Warm Audio WA-DI-A2/WA-DI-P2 Stereo Direct Box - Passive

Warm Audio WA-DI-A2 / WA-DI-P2 Stereo Direct Box

The Warm Audio Stereo Direct Box is available in Active WA-DI-A2 and Passive WA-DI-P2 variants for routing two channels of instruments or playback equipment into balanced mic-level inputs. Both versions use custom USA-made CineMag transformers, 100% analog circuitry, variable attenuation, polarity reversal, ground lift, and independent controls for professional stereo signal conversion.

Designed for keyboards, synthesizers, stereo guitar rigs, drum machines, acoustic instruments, DJ equipment, and other sources, each channel provides instrument and auxiliary input options plus a direct THRU connection. A variable -3 dB to -30 dB pad helps manage hotter signals, while selectable Instrument/Amp Out operation expands the DI for conventional instruments or compatible amplifier-output workflows.

The Active WA-DI-A2 adds selectable active circuitry for lower-output and high-impedance sources and operates from 48V phantom power supplied by a compatible mixer, interface, preamp, or stage box. It can also switch to passive operation. The WA-DI-P2 requires no power and is optimized for straightforward transformer-balanced conversion from higher-output sources such as keyboards, drum machines, and powered instrument electronics.

Key Features

• Active or Passive Stereo Variants: Choose the WA-DI-A2 for switchable active/passive operation or the WA-DI-P2 for fully passive signal conversion.
• Dual-Channel Design: Processes two independent channels for stereo keyboards, synthesizers, pedalboards, modelers, playback systems, and other sources.
• CineMag USA Transformers: Uses one custom-wound output transformer per channel for balanced mic-level signal conversion and galvanic isolation.
• Variable Input Pad: Provides continuously adjustable attenuation from -3 dB to -30 dB for controlling high-output sources before they reach the mixer or interface.
• Ground Lift per Channel: Helps reduce hum and buzz associated with ground loops in interconnected stage and studio systems.
• Polarity Reverse: Reverses signal polarity independently to address wiring or phase-related problems in complex audio setups.
• Instrument and Amp Output Modes: Accommodates normal instrument sources or compatible amplified outputs when correctly connected to a suitable speaker load.
• Road-Ready Aluminum Construction: Protects the internal analog circuitry for studio, venue, touring, and installed-audio applications.

Technical Specifications

• Brand: Warm Audio
• Variant Models: WA-DI-A2 Active Stereo, WA-DI-P2 Passive Stereo
• Product Type: Transformer-balanced stereo direct box
• Number of Channels: 2
• Signal Path: 100% analog
• Output Transformers: 2 x custom-wound CineMag USA transformers, one per channel
• Input Impedance: 1 Megohm
• Balanced Output Impedance: 600 ohms, mic level
• Frequency Response: 10 Hz to 100 kHz, +/-0.5 dB
• Variable Pad: -3 dB to -30 dB
• Polarity Reverse: Yes, per channel
• Ground Lift: Yes, per channel
• Input Mode: Instrument or Amp Out selectable per channel
• Instrument Inputs: 2 x 1/4-inch unbalanced
• Auxiliary Inputs: 2 x unbalanced RCA
• Thru Connections: 2 x 1/4-inch
• Balanced Outputs: 2 x 3-pin XLR
• Active Variant: WA-DI-A2
• WA-DI-A2 Operating Modes: Selectable active or passive
• WA-DI-A2 Power: 48V phantom power in active mode
• WA-DI-A2 Active THD: 0.01% from 20 Hz to 50 Hz; less than 0.003% from 50 Hz to 20 kHz
• WA-DI-A2 Passive THD: 0.01% from 20 Hz to 50 Hz; less than 0.004% from 50 Hz to 20 kHz
• WA-DI-A2 Weight: 1.8 lb
• Passive Variant: WA-DI-P2
• WA-DI-P2 Operating Mode: Passive
• WA-DI-P2 Power: No external power required
• WA-DI-P2 THD: 0.01% from 20 Hz to 50 Hz; less than 0.004% from 50 Hz to 20 kHz
• WA-DI-P2 Weight: 1.7 lb
• Dimensions: 5 x 5.5 x 2.9 inches
• Construction: Aluminum
• Warranty: 5-year limited warranty with registration

What's In the Box

• Warm Audio WA-DI-A2 Active Stereo Direct Box or WA-DI-P2 Passive Stereo Direct Box, depending on selected variant