Biamp 920-01887-00001 AMP-D225H

Product Overview

The Biamp AMP-D225H is a two-channel Class D install amplifier that delivers 25 watts per channel in a compact, fanless half-rack chassis. Built for conference rooms, huddle rooms, and small commercial spaces, this 2-channel Class D amplifier powers a pair of low-impedance loudspeakers for program audio and voice reinforcement. Because it needs no cooling fan, the AMP-D225H can sit in the room itself with no added mechanical noise. It is a practical compact conference room amplifier for background music, presentation audio, and soft-codec playback.

Product Description

The AMP-D225H combines flexible input options with quiet, efficient amplification for everyday commercial AV rooms. In stereo mode it produces 2 x 25 W into 8 ohms or 2 x 35 W into 4 ohms, and its channels can be bridged for 1 x 35 W into 8 ohms or 1 x 55 W into 4 ohms when a single higher-power output is needed. Audio performance is strong for the class, with THD+N below 0.1 percent at 1 watt across the 20 Hz to 20 kHz band. A built-in three-band EQ gives installers control over bass, mid, and treble to tune the system to the room and loudspeakers.

Connectivity is well suited to integration: four unbalanced stereo inputs, a USB input for direct computer audio and volume control, four GPIO, and two RS-232 interfaces for control-system integration. An auto-power function turns the amplifier on when signal is detected and returns it to sleep after roughly 15 minutes without audio, which helps meet energy expectations in commercial deployments. The fanless, half-rack design mounts neatly in a credenza or small rack and drives loudspeakers throughout the Biamp collection, including Desono models such as the Desono COLS41 column loudspeaker.

Key Features

• Two-Channel Class D Output — The amplifier delivers 2 x 25 W into 8 ohms or 2 x 35 W into 4 ohms for efficient, low-heat operation.
• Bridgeable Channels — Channels can be bridged for 1 x 35 W into 8 ohms or 1 x 55 W into 4 ohms when a single higher-power output is required.
• Fanless Design — With no cooling fan, the amplifier can be placed in a conference room with virtually no audible noise.
• Flexible Inputs — Four unbalanced stereo inputs plus a USB input support source devices and direct computer audio with volume control.
• Built-In 3-Band EQ — Bass, mid, and treble controls let installers tune output to the room and connected loudspeakers.
• Control Integration — Four GPIO and two RS-232 interfaces allow integration with a room control system.
• Auto Power — The amplifier powers on when signal is detected and enters sleep mode after about 15 minutes without audio.

Typical Applications

• Conference room
• Huddle room
• Commercial meeting space
• Multi-purpose room
• Training room

Technical Specifications

Specifications sourced from the Biamp AMP-D225H datasheet. Confirm detailed specifications against current Biamp documentation.

Frequently Asked Questions

How much power does the AMP-D225H deliver?
In stereo it provides 2 x 25 W into 8 ohms or 2 x 35 W into 4 ohms; bridged, it delivers 1 x 35 W into 8 ohms or 1 x 55 W into 4 ohms.

Is it a low-impedance or 70V/100V amplifier?
The AMP-D225H is a low-impedance (4/8 ohm) amplifier intended for direct-coupled loudspeaker pairs in small rooms.

Will it make noise in a conference room?
No. The amplifier is fanless and can be placed in the room itself with virtually no audible noise.

How does it integrate with a control system?
It offers four GPIO and two RS-232 interfaces, plus a USB input for direct computer audio and volume control.

Does it power down automatically?
Yes. Auto power turns it on when signal is detected and returns it to sleep after roughly 15 minutes without audio.

Can I tune the sound?
Yes. A built-in three-band EQ provides control over bass, mid, and treble.

What warranty applies?
The AMP-D225H is covered by a five-year Biamp warranty.