Behringer DI800 Ultra-DI PRO V2 Rack Mixing Desk

Behringer DI800 Ultra-DI PRO V2: 8-Channel Active Rack DI Box

The Behringer DI800 Ultra-DI PRO V2 is an 8-channel active direct injection box built into a single 19" rack unit, engineered to convert unbalanced instrument signals into clean, balanced line-level feeds for mixers, audio interfaces, and FOH consoles. Each channel strips noise from long cable runs, resolves ground-loop hum, and matches impedance between instruments like guitars, basses, and keyboards and the next stage in the signal chain. The DI800 V2 is the right choice for live sound engineers, multi-instrument home studio owners, and touring acts who need eight reliable DI channels in one compact chassis.

Servo-Balanced Circuit and Multi-Power Design

What separates the DI800 V2 from a stack of single-channel DI boxes is its servo-balanced active circuitry, which delivers an ultra-flat frequency response from the bottom of the audible range well above it. The unit accepts either universal mains AC or +48 V phantom power from the connected mixer, so the same rack unit can be repositioned across studio and stage setups without rewiring. Illuminated channel switches keep operation clear in dark FOH racks and on dimly lit stages.

Channel Architecture — 8 Independent Active DIs

Eight simultaneous DI channels give engineers room to handle a full band — two guitars, bass, two keyboards, electronic drums, and two more sources — without daisy-chaining external boxes. Each channel is fully independent with its own balancing stage, so there's no internal crosstalk or shared-reference noise floor.

• Number of Channels: 8 — full band coverage in one rack unit
• Circuit Type: Active, servo-balanced — ultra-flat frequency response across the spectrum
• Pad: −30 dB switchable — protects the input stage when fed hot speaker-level signals
• A front-panel +20 dB boost switch lifts weak passive-pickup instruments without adding hiss to the signal.

Audio Performance and Signal Integrity

Headroom and noise floor are decisive for a rack of DIs running all night. The DI800 V2 quotes tight THD and noise figures, a wide bandwidth, and very high input impedance so instrument pickups do not see a load change before conversion to balanced XLR.

• Frequency Response: 10 Hz – 50 kHz (±3 dB) — leaves headroom beyond both audible ends
• THD + Noise: < 0.01 % at 1 kHz — clean conversion with no audible coloration
• Signal-to-Noise Ratio: −96 dBu (22 Hz – 22 kHz) — quiet enough for studio capture and broadcast feeds
• Maximum Input Level: +48 dBu — handles amplifier outputs up to 3000 W with the pad engaged
• Engineers will notice the 350 kΩ input impedance preserves the natural tone of passive pickups without loading them down.

Connectivity, Power, and Physical Format

Every channel has an unbalanced input plus a parallel LINK for routing to a stage amp, a post-amp unbalanced output, and a balanced XLR feed for the mix bus. The internal switch-mode power supply runs from any standard AC source worldwide, while +48 V phantom power offers a fallback when no mains outlet is near the rack.

• Audio I/O per channel: 1/4" TS input, 1/4" TS LINK/Thru, 1/4" TS post-amp output, XLR balanced output
• Ground Lift: Switchable per channel — kills ground loops without unhooking cables
• AC Input Power: 100–240 VAC, 50/60 Hz internal switch-mode supply
• Rackmount Size: 1U / 19"
• Dimensions: 483 × 134 × 44 mm — slim enough for shallow racks and portable fly racks
• At 1.8 kg, the chassis stays light enough for touring fly racks without sacrificing build rigidity.

Who the DI800 V2 Is For

The DI800 V2 is the right choice for live sound engineers building or expanding a compact DI rack, smaller churches and clubs that need eight channels in a single 1U slot, and multi-instrument home studios recording a full band in one pass. Touring players who run keyboards, bass, acoustic-pickup guitars, and electronic drums into a single rack will appreciate having one chassis with global mains/phantom flexibility rather than eight wall-wart boxes.