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

The Dynaudio Delta 40 is a four-channel 2U power amplifier for studios and installations that handle processing elsewhere and need clean power for 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. Setup stays simple, with four balanced XLR inputs, a level control for each channel on the front panel and speakON outputs on the back. This is the 120 V model.

Working with Delta DSP

The Delta 40 has no onboard processing of its own. A Delta DSP amplifier can feed it processed signal from its four auxiliary outputs, so one DSP model runs crossovers and EQ for a stereo four-way system. With the optional Dante card fitted, a rear-panel switch moves all four channels from the XLR inputs to the network, with 24-bit/96 kHz conversion.

Protection and Backup

Every channel has a limiter, and the amplifier protects itself and the speakers against short circuits, DC and overheating. Depending on the fault, protection mutes all four channels or one channel pair. A short circuit on an output mutes only its own pair, 1+2 or 3+4, and the other two channels keep playing. Speaker backup inputs 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
• Four balanced XLR inputs with rear-panel link switches
• Rear-panel source switch for analog or Dante network audio (the Dante card is an option)
• Level control and signal meter with limit indicator on each channel
• speakON outputs, with the channel 1 and 3 sockets also carrying channels 2 and 4 for bi-amping or bridging over one NL4 cable
• Speaker backup inputs for a redundant backup amplifier
• Standby mode powers down the amplifier channels
• 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)
• Inputs: 4 x balanced XLR
• Outputs: 4 x Neutrik speakON
• 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)