dbx DJD1 2-Channel Passive Direct Box

dbx DJD1 2-Channel Passive Direct Box

The dbx DJD1 is a compact, road-ready direct box engineered to convert unbalanced instrument and line-level signals into balanced XLR outputs without requiring external power. Built around transformer isolation and passive circuit design, it delivers transparent impedance matching and ground-loop elimination—essential tools for live sound engineers, studio technicians, and touring musicians who demand clean signal transfer without noise or coloration.

Audio Performance & Signal Integrity

The transformer-isolated XLR outputs achieve a noise floor of −104 dBu (22 Hz to 22 kHz, input shorted) with THD + N of 0.23% typical at +4 dBu and 1 kHz—specifications that ensure minimal artifacts and transparent signal transfer across your entire audio chain. The ground-lift switch eliminates hum caused by ground loops, while RF filtering on the inputs keeps interference out of your signal path.

Connectivity & Operational Design

Two parallel 1/4" unbalanced TS inputs (50 kOhms impedance each) connect to two XLR balanced outputs (600 Ohms impedance), allowing flexible routing for stereo or dual-mono configurations. An input attenuator prevents clipping from hot signals, and the compact footprint of 5.51 × 4.72 × 1.57 inches fits seamlessly into racks, 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 DJD1 combines rock-solid impedance conversion, transformer isolation, and professional-grade specifications in a passive design that adapts reliably to any signal source without introducing noise or requiring external power.