Dynaudio Delta 40 DSP Four-Channel Power Amplifier (120V)

The Dynaudio Delta 40 DSP is a four-channel 2U power amplifier with built-in processing, made for studios and installations that run passive monitors. It delivers 1000 W per channel into 4 ohms, or 2400 W from a bridged pair, with THD below 0.18% at 1 kHz. Onboard EQ, crossovers, delay and limiting handle room tuning and multi-way splits without an outboard processor. Dynaudio names the Delta 40 DSP as an amplifier option for its Dynaudio Acoustics C3 MkII and M3FX monitors. This is the 120 V model.

Processing and Control

Each input has eight parametric EQ bands and three bands of dynamic EQ. Each output adds nine more parametric bands, Butterworth, Bessel or Linkwitz-Riley crossover filters up to 48 dB per octave, FIR filtering, up to 650 ms of delay, and program and peak limiters. Settings are edited on the front-panel display, from a computer over USB, Ethernet or RS485, or wirelessly from an iPad with the DeltaDirect app.

Inputs, Outputs and Backup

Four balanced XLR inputs take analog signal, and inputs C and D switch to AES3 digital with a stereo pair on each, so an analog feed can stay patched as a fallback. Four auxiliary XLR outputs run their own processing channels and can drive a non-DSP Delta amplifier for a stereo four-way system. An optional Dante card adds four network inputs and four network outputs. Speaker backup inputs on the rear panel connect a second amplifier that switches into circuit if the main one loses power or goes into protection.

Features

• Four channels, 1000 W per channel into 4 ohms
• Channel pairs 1+2 and 3+4 bridge for 2400 W into 4 ohms
• 8 parametric and 3 dynamic EQ bands per input
• 9 parametric EQ bands, crossover filters, FIR filtering, delay and limiters per output
• Four independently processed auxiliary XLR outputs
• Analog XLR inputs, with inputs C and D switchable to AES3
• Optional Dante card with four network inputs and four network outputs
• Control from the front panel, USB, Ethernet, RS485, AudioCore software and the DeltaDirect iPad app
• GPIO port with two inputs and two outputs for memory recall, standby, mutes and level control
• Settings stored as memories, with a password-protected front-panel lock
• Speaker backup inputs for a redundant backup amplifier
• Standby mode powers down the amplifier channels and keeps the DSP running
• Limiters, short-circuit, DC and thermal protection, and mains inrush control
• Variable-speed fans with front-to-rear airflow and a cleanable front filter

Specifications

• Channels: 4
• Output power per channel: 500 W at 8 ohms, 1000 W at 4 ohms, 1400 W at 2.7 ohms, 1200 W at 2 ohms
• Output power, bridged: 2000 W at 8 ohms, 2400 W at 4 ohms
• Minimum load: 2 ohms with reduced output (4 ohms bridged)
• THD (1 dB below maximum output): below 0.18% at 1 kHz, below 0.2% from 20 Hz to 20 kHz
• Frequency response: 20 Hz to 20 kHz (+0/-0.5 dB)
• Gain: 32 dB
• Sensitivity for maximum power: 6.2 dBu
• Input impedance: 20 kilohms, active balanced
• Input CMRR: above 60 dB
• Damping factor: above 400 (1 kHz, 8 ohms)
• DSP sample rate: 96 kHz
• AES3 input sample rates: 32 kHz to 192 kHz
• Auxiliary outputs: active balanced XLR, +18 dBu maximum, above 114 dB dynamic range
• Delay: up to 650 ms per input and per output
• Crossover filters: Bessel and Butterworth 6 to 48 dB per octave, Linkwitz-Riley 12, 24 and 48 dB per octave
• Current draw: 6.0 A nominal at 120 V into 4 ohms, below 5 W in standby
• Mains: 120 V, powerCON inlet
• Rack size: 2U, 19 in
• Dimensions (H x W x D): 88 x 482 x 428 mm (3.5 x 19.0 x 16.9 in)
• Weight: 10.0 kg (22.0 lbs)
• Shipping weight: 12.0 kg (26.5 lbs)