Bowers & Wilkins CDA-4D, 4-channel 125W DSP audio amplifier

The Bowers & Wilkins CDA-4D is a compact and powerful distribution amplifier designed to power both current and future Bowers & Wilkins Custom Installation loudspeakers. Integrated digital signal processing (DSP) enables optimization of a wide range of products and provides dynamic EQ for Bowers & Wilkins subwoofers. With four channels and 125W of power each, this amplifier delivers high-quality performance in a minimal footprint.

Compact Power : The CDA-4D amplifier takes up 1U of rack space, yet delivers 125W of power per channel using Class D amplification. This allows for high performance even in minimal space. The amplifier can also be connected to create:
2 channels with 250W.
2.1 channel system with two 125W channels and one 250W.
Digital Signal Processing (DSP): The built-in DSP provides precise control of sound parameters and optimizes various audio components, especially subwoofers with dynamic EQ function. This allows the amplifier to adapt to various systems and ensure high sound quality.
Flexible use: The amplifier is perfect for both new and retrofit audio systems. It can power two zones, making it ideal for both larger and smaller installations. It also works with a wide range of Bowers & Wilkins products, both current and future.
Easy control and configuration: The amplifier supports control via IP and network configuration, providing convenient and remote control, which is especially useful in professional installations.
High-quality sound control: With a dynamic EQ function, the amplifier allows you to better tailor the bass reproduction to Bowers & Wilkins subwoofers, ensuring exceptional sound quality across the entire system spectrum.
Compact and efficient design: The 1U design ensures that the amplifier takes up minimal rack space, without sacrificing power and performance, helping to maximize space utilization.

Load impedance range: >3Ω per channel (>6Ω in bridge mode)
Output Power per channel, non-clipped: 60W into 8Ω
125 into 4Ω
Output Power bridge mode, non-clipped 500W short term
>125W continuous
DC offset voltage: <50mV
Frequency Response (-3dB): <10Hz to >30kHz, any load impedance
Frequency response accuracy, 20Hz-20kHz: +/-1dB
Dynamic range: >85dB A-Weighted
THD+N (1kHz, 500W, 4Ω): less than 1%
Voltage Gain: 15dB to 39dB, adjustable
Input impedance: 10kΩ
Maximum input voltage: 4 Vrms
Signal sense threshold: 2.5mV (independent of Gain setting)
Wake-up time: <0.2s (If other zones active)
<2s (From all zones inactive)
Turn-off time: 15 minutes from last signal detected
12V trigger input threshold: Typically 3V (recommended input is 5-15V) (TBC)
Controls and Indicators
Front panel: 1 x Power LED (unit active – White, Fault – Red)
1 x Network status LEDs (Signal present – ​​White, Fault – Red)
2 x Zone status LEDs (Signal present – ​​White, Fault – Red)
1 x Reset button
Connectors
Input: 2 x RCA (pair) Phono socket, Analogue line in
2 x RCA Phono socket, Digital line in
1 x Ethernet
Output: 2 x 5.08mm Pitch 4-way Phoenix Combicon style
12V trigger control: 1 x 3.5mm jack - 12V trigger IN
1 x 3.5mm jack - 12V trigger OUT (Maximum 100mA pass-through
Power
Power consumption: <0.5W Standby, WoL disabled
<2W Standby, WoL enabled
300W maximum average (TBC)
1,000W peak (TBC)
AC power supply: 100-240V 50/60Hz
AC inlet: IEC C14, switched
Thermal
Thermal dissipation: TBC BTU/hr (standby)
TBC BTU/hr (Idle)
TBC BTU/hr (max)
Dimensions
Height: 42.5mm (1.7in) 1U (57.5mm (2.3in) plus feet
Width: 436mm (17.2in)
Depth: 300mm (11.8in)
Net weight: 4.0kg (8.8lb)

User manual (EN)

Factsheet (EN)

Installation instructions (EN)