Dynacord U120:1-US – 120W Single-Channel Power Amplifier

Product Overview

The Dynacord U120:1 is a 120 W single-channel power amplifier for fixed commercial audio systems that already have a source mixer or DSP front end. As a 70V power amplifier supporting 70 V, 100 V, 4 ohm, and 8 ohm loads, it serves as a compact distributed audio amplifier for background music and paging in retail, hospitality, and meeting spaces. With rear-panel controls and a half-rack chassis, it is a set-and-forget install amplifier for spaces where front-panel access should be restricted.

Product Description

The U120:1 is a power-amplifier-only member of the Dynacord U Series, delivering 120 W of Class-D output without an onboard mixer, making it ideal where a separate mixer, DSP, or matrix supplies the program signal. It accepts one balanced line input on a 3-pin Eurostyle connector and one unbalanced line input on RCA (summed to mono), plus a dedicated EMG priority input that takes line-level or 100 V signals so emergency and all-call messages override program audio. The output stage is DIP-selectable for 4 ohm, 8 ohm, 70 V, and 100 V, letting the same unit drive high-Z distributed ceiling systems or low-Z surface speakers. Gain, bass, and treble controls are located on the rear panel for a secure set-and-forget configuration, with a clean front panel that prevents tampering in public-facing installations. A four-stage temperature-controlled fan keeps the unit quiet at low output and cool under sustained load, and remote power standby reduces idle consumption for energy-conscious deployments. Built for continuous fixed-install use, this Dynacord U Series amplifier integrates cleanly downstream of paging controllers and audio DSP. Browse the full Dynacord collection at Creation Networks, or for an install amplifier with onboard DSP see the Dynacord C1300FDi DSP power amplifier.

Key Features

• 120 W Class-D Power Amplifier — Single-channel Class-D output delivers 120 W with high efficiency and low heat for continuous commercial operation.
• 70 V / 100 V and Low-Z Output — Selectable 4 ohm, 8 ohm, 70 V, and 100 V operation supports both distributed high-Z and direct low-Z loudspeaker systems.
• Balanced and Unbalanced Line Inputs — A balanced 3-pin Eurostyle input and an unbalanced RCA input accept signal from mixers, DSP, and matrix systems.
• EMG Priority Override — A dedicated emergency input accepts line-level or 100 V signals with level selection so critical messages take precedence over program audio.
• Rear-Panel Set-and-Forget Controls — Gain, bass, and treble adjustments sit on the rear panel, leaving a clean front face that prevents tampering in public spaces.
• Four-Stage Cooling — A temperature-controlled four-stage fan keeps the amplifier quiet at low levels and stable under sustained load.
• Switchable 120 Hz High-Pass Filter — A selectable HPF removes unwanted low-frequency content to protect speakers and improve speech clarity.
• Half-Rack 1U Chassis — Included brackets allow single, side-by-side rack, table-top, or under-counter mounting, with two units fitting one rack space.
• Remote Power Standby — Contact-closure remote power off reduces standby consumption to 1.25 W for energy-conscious installations.

Typical Applications

• Conference rooms
• Commercial meeting spaces
• Multi-purpose rooms
• Training rooms
• House of worship
• Government spaces

Technical Specifications

Specifications sourced from the Dynacord U120:1 datasheet. Data subject to change without notice.

Frequently Asked Questions

Does the U120:1 support both 70 V and 100 V distributed speaker systems?
Yes. The output is DIP-switch selectable for 4 ohm, 8 ohm, 70 V, and 100 V, so it works with high-Z distributed ceiling and pendant systems as well as low-Z surface speakers.

Does this model include a mixer?
No. The U120:1 is a power amplifier with one balanced and one unbalanced line input plus an EMG priority input. It is intended to sit downstream of a mixer, DSP, or paging controller. For an integrated mixer, see the U120:1M model.

Why are the controls on the rear panel?
Gain, bass, and treble are placed on the rear panel as a set-and-forget design, leaving a clean front face that prevents accidental or unauthorized adjustment in public-facing installations.

How does it handle emergency announcements?
The dedicated EMG priority input accepts line-level or 100 V signals with selectable level and overrides program audio so critical messages are heard.

How is the amplifier mounted in an equipment rack?
The half-rack 1U chassis ships with brackets for single rack-mount, side-by-side mounting (two units per rack space), table-top, or under-counter installation.

What warranty and support are available?
Dynacord products carry the manufacturer's standard warranty. Creation Networks provides pre-sale system design guidance and post-sale support for commercial AV deployments. Contact our team through the Creation Networks site for documentation and assistance.

Is this model suitable for 24/7 operation?
Yes. The Class-D design, four-stage cooling, protection circuitry, and remote standby make it appropriate for continuous fixed-install commercial use.