dbx DJD1 2-Channel Passive Direct Box

dbx DJDI 2-Channel Passive Direct Box

The dbx DJDI is a compact, road-ready direct box built for converting unbalanced instrument and line-level signals into balanced XLR outputs. Its passive design requires no power supply, making it a reliable workhorse for live sound applications, studio recording sessions, and any situation where you need clean impedance matching and ground isolation without adding noise or coloration to your signal chain.

Audio Performance & Isolation

Transformer-isolated XLR outputs deliver a noise floor of -104 dBu (measured 22 Hz to 22 kHz with input shorted), while THD + N measures 0.23% typical at +4 dBu and 1 kHz—specifications that ensure transparent signal transfer with minimal artifacts. The ground-lift switch eliminates hum caused by ground loops, a critical feature in any balanced audio workflow.

Design & Connectivity

The DJDI accepts two parallel 1/4" unbalanced TS inputs (each at 50 kOhms impedance) and outputs balanced XLR pairs at 600 Ohms impedance. An input attenuator prevents clipping from hot signals, while RF filtering on the inputs keeps interference out of your audio path. The compact footprint—just 5.51 × 4.72 × 1.57 inches—fits easily into rack spaces, pedalboards, or a gig bag.

Key Features

• Passive circuit design — no power supply required
• 2 × parallel 1/4" unbalanced TS inputs at 50 kOhms impedance
• 2 × XLR balanced outputs at 600 Ohms impedance
• Transformer-isolated XLR outputs
• Ground-lift switch for hum elimination
• Input attenuator to prevent overloading from high-level signals
• RF filtered inputs
• Noise level: -104 dBu (22 Hz to 22 kHz, input shorted)
• THD + N: 0.23% typical at +4 dBu at 1 kHz
• Compact dimensions: 5.51 × 4.72 × 1.57 inches

The DJDI combines rock-solid impedance conversion, transformer isolation, and professional-grade specifications in a passive box that adapts to any signal source without introducing noise or requiring external power.