Hosa Technology DIB-307A Active Direct Box

Active DI box for routing guitar, bass, keyboards, or speaker-level signals directly to a mixer or interface. This unit is used, fully functional, and may show signs of heavy cosmetic use. Suited for live sound and studio applications requiring long cable runs and low-noise, balanced outputs.

Features include an instrument/speaker input with a 34 dB pad for speaker-level sources, balanced XLR output with ground-lift, and operation via 48 V phantom power or a 9 V battery. A rugged die-cast aluminum chassis supports stage use.

Key Features

• Instrument or Speaker Input: Switchable path with 34 dB pad to accept amp speaker outputs.
• Low-Noise Performance: 20 Hz–50 kHz (±0.5 dB) frequency response; residual noise −110 dB (typ.).
• Flexible Power: 48 V phantom power or 9 V battery; optional ACA-281 external supply.
• Connectivity: 1/4" input, XLR balanced output, 1/4" thru/out.
• Ground Lift: Breaks ground loops to reduce hum.
• Durability: Rugged die-cast aluminum enclosure.

Technical Specifications

• Dimensions: 4.25 × 4.00 × 2.00 in (10.80 × 10.16 × 5.08 cm)
• Inputs/Outputs: 1 × 1/4" instrument/speaker input; 1 × XLR balanced output; 1 × 1/4" thru/out
• Input Impedance: Instrument 5 MΩ; Speaker 10 kΩ
• Output Impedance: 100 Ω
• Minimum Load Impedance: ≥250 Ω
• Gain (Pad): Instrument −22 dB; Speaker −46 dB (pad engaged)
• Maximum Output Level: +5 dB
• Frequency Response: 20 Hz to 50 kHz (±0.5 dB)
• Total Harmonic Distortion: 0.05% @ 1 kHz, −10 dB
• Residual Noise: −110 dB or less
• Controls: Ground-lift switch; 34 dB pad
• Power Requirements: 48 V phantom power (~1.9 mA) or 9 V battery (~1.5 mA); optional ACA-281 external supply
• Chassis: Die-cast aluminum

What’s Included

• Hosa Technology DIB-307A Active Direct Box (used)
• 9 V battery