Bose Professional PowerShare PS404D Adaptive Power Amplifier

Bose Professional PowerShare PS404D is a power amplifier designed for installed commercial audio systems. It enables distributed and low-impedance amplification for system designers and integrators, supporting background and foreground audio workflows. This makes it ideal for fixed installations where flexible channel power allocation is required.

The amplifier uses PowerShare technology to distribute total available output power dynamically across all channels. It supports both low-impedance and 70V or 100V distributed systems with onboard DSP and network control. Integrated Dante audio networking allows digital audio transport and system integration.

The design supports installations that require centralized amplification with software-based configuration and monitoring. It is suited for venues that need scalable power distribution and system control across multiple zones. The platform allows integration with compatible control and DSP software for predictable system operation.

Key Features

• PowerShare technology: Distributes total available output power dynamically across all channels
• Load-independent outputs: Configurable per channel for low-impedance or 70V and 100V distributed systems
• Integrated Dante networking: Supports digital audio transport over standard Ethernet networks
• Onboard DSP: Includes signal processing for system configuration and loudspeaker management
• Network control support: Enables configuration and monitoring through ControlSpace Designer software
• Auto-standby operation: Reduces power consumption when the amplifier is not in active use

Technical Specifications

Channel Separation (Crosstalk)
> 65 dB (1 kHz), > 65 dB (20 kHz)

Dynamic Range
100 dB at rated power, A-weighted

Gain, High-impedance
35 dB, 70V mode / 38 dB, 100V mode

Gain, Low-impedance
30 dB

Maximum Peak Power, Symmetrical
200 W

Maximum Peak Power, Asymmetrical
800 W

Rated Power, Asymmetrical
400 W

Frequency Response
20 Hz – 20 kHz (±0.5 dB) at 1 W

SNR
100 dB (at rated power, A-weighted)

Number of Channels
4

THD+N
< 0.04% at 1 kHz, 4–8 Ω, 70V/100V

Input Channels
4 balanced, line

Input Impedance
20 kΩ

Input Sensitivity
+4 dBu low, +20 dBu high

Channels
4 Dante in

Connectors
(2) RJ-45 Dante in/thru

Channels
4

Connectors
(1) 8-pin inverted Euroblock

EMC
This product meets all EN55032 immunity requirements for E2 electromagnetic environment

Current Draw, Idle
0.1 A at 120 VAC, 60 Hz / 0.06 A at 230 VAC, 50 Hz

Current Draw, Input
8.0 A at 120 VAC, 60 Hz / 2.1 A at 230 VAC, 50 Hz

Mains Connector
IEC C14 inlet

Mains Voltage
100–240 VAC (±10%), 50/60 Hz

AC Power Consumption
14 W standby, 500 W maximum

Software Applications
ControlSpace Designer 5.4 or later (Windows)

Controls, Front Panel
10 soft buttons

LED Status Indicators
10 power/status LEDs, (4) input signal LEDs, (4) output limit LEDs

Delay
50 ms, Outputs 4-way

Equalization
Input EQ: 8-band parametric EQ, 3-band shelving, high-pass, low-pass, and bass crossover

A/D and D/A Converters
48 kHz / 24-bit

Colors
Black

Cooling System
Microprocessor-controlled, variable-speed fans, left to right air flow

Suspension/Mounting
Rack-mounting

Product Dimensions (H×W×D)
1.7" × 19.0" × 16.3" (44 mm × 483 mm × 414 mm)

Net Weight
14.1 lbs (6.4 kg)

Shipping Weight
17.2 lbs (7.8 kg)

Rack Spaces
1

What’s in the Box

(1) 2-pin Euroblock connector
(1) 8-pin Euroblock connector
(1) 12-pin Euroblock connector
(1) PowerShare PS404D
(1) installation guide
(1) IEC power cord