Dynacord U240:1M-US – 240W Single-Channel Mixer Amplifier

Product Overview

The Dynacord U240:1M is a 240 W mixer amplifier for medium commercial audio systems that combine background music with clear voice paging. As a 70V mixer amplifier supporting 70 V, 100 V, 4 ohm, and 8 ohm loads, it is the highest-output commercial background music amplifier in the U Series mixer line, suited to larger retail floors, houses of worship, and multi-purpose rooms. Its four-input mixer, EMG priority override, and half-rack chassis let integrators deploy a complete paging-and-music head end without a separate mixing console.

Product Description

The U240:1M combines a four-input mixer with a 240 W Class-D power amplifier in a half-rack 1U enclosure, delivering source mixing and high output for distributed audio systems from a single device. Two mic/line inputs with switchable 48 V phantom power accept microphones or line sources, and two stereo aux inputs (summed to mono) handle background music players. The EMG priority input takes line-level or 100 V signals with selectable level so all-call and emergency messages override program audio. MIC1 offers a call-station interface with contact-closure triggering and a configurable two-tone chime, while VOX ducking on MIC2 automatically lowers music under live speech for intelligible announcements. DIP-selectable output for 4 ohm, 8 ohm, 70 V, and 100 V lets the same amplifier drive longer high-Z distributed speaker runs or low-Z surface speakers, and a four-stage temperature-controlled fan keeps the unit quiet at low output and cool under sustained load. Built for continuous commercial deployment, this Dynacord U Series amplifier offers remote power standby and front-panel gain, bass, and treble adjustment for fast commissioning. Browse the full Dynacord collection at Creation Networks, or for larger DSP-equipped install amplifiers see the Dynacord C1300FDi DSP power amplifier.

Key Features

• Four-Input Mixer Amplifier — Two mic/line and two aux inputs combine microphones and music sources in one unit, removing the need for an external mixer.
• 240 W of Output — The highest-power U Series mixer amplifier drives larger zones and longer 70 V/100 V speaker runs from a half-rack chassis.
• 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.
• 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.
• Call-Station Interface with Two-Tone Chime — MIC1 supports contact-closure paging with a configurable attention chime for clear all-call announcements.
• VOX Ducking — Automatic ducking lowers background music under live speech for intelligible voice communication.
• Class-D Topology — Class-D amplification improves energy efficiency and reduces heat versus traditional linear and Class-AB designs.
• Four-Stage Cooling — A temperature-controlled four-stage fan keeps the amplifier quiet at low levels and stable under sustained load.
• Switchable 48 V Phantom Power — Both mic inputs supply phantom power for condenser microphones and powered call stations.
• 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

• Auditorium
• House of worship
• Multi-purpose rooms
• Commercial meeting spaces
• All-hands rooms
• Training rooms

Technical Specifications

Specifications sourced from the Dynacord U240:1M datasheet. Data subject to change without notice.

Frequently Asked Questions

Does the U240:1M 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.

How many speakers can 240 W drive on a 70 V/100 V line?
Total connected speaker tap wattage should stay within the 240 W rating with headroom for line losses. Sum the tap settings of all speakers in the zone and confirm the total fits within the amplifier rating during system design.

Can it page over background music automatically?
Yes. VOX ducking on the MIC2 input lowers music when speech is detected, and the EMG priority input overrides all program audio for emergency or all-call messages.

How does it integrate with a call station?
The MIC1 input provides a call-station interface on a 5-pin Eurostyle connector with contact-closure triggering and a configurable two-tone chime. It is compatible with the Dynacord PLE-1CS all-call station.

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.