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Mixer amplifier Dynacord U240:1M - 1 channel 240 W, 100 V / 70 V line or 4-8 ohms, half rack (U240:1M-EU)

Dynacord U240:1M mixer amplifier: 240 W on one channel, on a 100 V or 70 V line as well as into 4 or 8 ohms, in a half-rack 1U enclosure. Four inputs, a priority emergency input and VOX ducking for background music and announcements in a shop or a school.

  • 240 W, 1 channel, class D
  • 100 V / 70 V line or 4 / 8 ohms
  • 2 XLR mic/line inputs, 48 V phantom
  • 2 RCA aux inputs
  • Line or 100 V emergency input
  • VOX ducking 0 to 45 dB
  • Call station + chime
  • Bass / treble ±12 dB
  • Half rack 1U, 2 side by side
  • 1.9 kg, brackets included
Ref.: U240:1M-EU
New
Mixer amplifier Dynacord U240:1M - 1 channel 240 W, 100 V / 70 V line or 4-8 ohms, half rack (U240:1M-EU)
Mixer amplifier Dynacord U240:1M - 1 channel 240 W, 100 V / 70 V line or 4-8 ohms, half rack (U240:1M-EU) – view 2
Mixer amplifier Dynacord U240:1M - 1 channel 240 W, 100 V / 70 V line or 4-8 ohms, half rack (U240:1M-EU) – view 3

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Manufacturer's datasheetView the PDF · 2,2 Mo — downloadable

Product overview

PA mixer amplifier for background music and announcements in a shop, a restaurant, a school or a house of worship: 240 W on one channel, 100 V / 70 V line or 4 / 8 ohms and voice priority.
Inputs: 2 XLR mic/line with 48 V phantom, 2 RCA aux, 1 line or 100 V emergency input
Announcements: VOX ducking up to 45 dB, call station on MIC1 with two-tone chime
Sound: bass and treble ±12 dB, switchable 120 Hz high-pass, less than 0.5 % distortion
Installation: half rack 1U enclosure, two units side by side in 1U, on or under a table; 1.9 kg
Operation: remote standby by contact closure (1.25 W), four-stage fan, limiter and protections
A single unit to mix, amplify and prioritise announcements in a small or medium installation, instead of a separate mixer and amplifier.

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Description

Dynacord U240:1M · Reference U240:1M-EU

Background music,
and the voice comes first.

The U240:1M mixes four sources, amplifies them at 240 W on one channel and puts announcements ahead of the music, in a half-rack-width enclosure. It targets small and medium installations: shop, restaurant, classroom, house of worship, conference room.

Black Dynacord U240:1M mixer amplifier, three-quarter view, gain knobs on the front
  • 240 Won one channel, class D
  • 100 V70 V, 4 or 8 ohms
  • 4inputs + an emergency one
  • 1 Uhalf rack width

100 V line or 8-ohm speakers

The same unit delivers its full power on a 100 V or 70 V line, to drive several transformer speakers, as well as in low impedance into 4 or 8 ohms. The choice is made with DIP switches, and the 4-pin output terminal separates the two connections.

Dynacord U240:1M rear panel: mains inlet, DIP switches, output and emergency terminals, two XLR inputs, AUX inputs and RCA line outputOutput and emergency terminals, two XLR, AUX and RCA line output.

Four sources, two powered mics

Two XLR mic/line inputs take dynamic or condenser microphones, with 48 V phantom power switched on the rear. Two RCA aux inputs take a player or a music receiver, their stereo summed to mono. The front carries a gain per input, bass and treble at ±12 dB and the master volume; a switchable 120 Hz high-pass filter removes unwanted low end.

The announcement before the music

On the MIC2 input, the VOX function lowers the music by 0 to 45 dB as soon as a voice exceeds the set threshold, then restores it. The MIC1 input accepts a call station through its 5-pin Euro terminal: the talk key triggers priority and, if desired, a two-tone chime. An emergency input, line or 100 V, takes precedence over all the others to relay a safety message.

Two amplifiers in a single rack unit

At 44.2 mm high and 218 mm wide, the U240:1M takes up half a rack unit. The supplied brackets fix it alone in a 19-inch rack or side by side with a second unit of the series, in 1U. It can also sit on a shelf or be screwed under a counter. Its four-stage fan, from off to fast, follows the temperature to stay quiet at low power.

Two Dynacord U Series amplifiers mounted side by side in a single 19-inch rack unitTwo units side by side in one rack unit, with the supplied brackets.

A dry contact wired to the REMOTE OFF terminal puts the amplifier in standby, at 1.25 W: a shop's sound system is switched off from the electrical cabinet or a timer, without touching the unit.

For the announcement position, see our microphones; for loudspeakers and speakers, the PA system department and the image and sound range.

Values taken from the Dynacord U240:1M data sheet and the model's official page.

Technical specifications

Technical specifications
Weight (kg)1.9 kg (2.4 kg with accessories)
Output power240 W (IHF-A-202 standard), full power into 4 ohms, 8 ohms, 70 V line and 100 V line
AmplificationBuilt-in class D amplifier, 1 channel
EQ controlsBass ±12 dB at 100 Hz, treble ±12 dB at 10 kHz; switchable 120 Hz high-pass filter (12 dB/octave); permanent 20 Hz low cut
Box contentsU240:1M mixer amplifier with its rack and table mounting accessories
FeaturesAutomatic music ducking (VOX ducking, 0 to 45 dB) on the MIC2 input, call station priority on MIC1 with two-tone chime, priority emergency input, remote standby by contact closure
Dimensions (W x H x D)218 × 44.2 × 217.7 mm (without accessories)
Output harmonic distortionLess than 0.5 % at rated power, 1 kHz
Frequency response< 20 Hz – 20 kHz from any input to output (−3 dB) · < 20 Hz – 15 kHz from the emergency input
Audio input2 balanced 3-pin XLR mic/line inputs (MIC1 also on 5-pin Euroblock for a call station with priority contact), 2 RCA aux inputs with stereo summed to mono, 1 EMG emergency input, line or 100 V (2-pin Euroblock)
Audio output4-pin Euroblock speaker output (2 for low impedance, 2 for high impedance) · unbalanced left/right RCA line output
Power consumptionStandby 1.25 W · idle 10 to 14 W · 55 W at 1/8 of rated power
Product colourTraffic black (RAL 9017)
Power supplyMains 100 – 240 V AC ±10 %, 50/60 Hz, protection class I (earthed)
Technical specifications (continued)
Phantom powerSwitchable 48 V on both mic/line inputs
MountingStand-alone, in a 19" rack (brackets included), two units side by side in 1U, on or under a table
Operating temperature−5 °C to 45 °C
Product type1-channel PA mixer amplifier, class D, half 19" rack 1U format
Gross weight (packaged)2.8 kg
ControlsFront: gain LINE/MIC 1 and 2, AUX 1 and 2, bass, treble and output volume · rear: configuration DIP switches (emergency input, chime, high-pass, VOX, phantom, output mode)
ProtectionsAudio limiter; protection against overheating, DC, high frequencies, short circuits and overcurrent; power supply protected against over- and undervoltage, with inrush current limiter
Lighting and indicatorsFront LEDs: Protect (red), Peak (red, 1 dB before clipping), Signal (green), Call (green, emergency, priority or VOX active), Power (green)
ImpedanceLow impedance 4 or 8 ohms, or high impedance 70 V / 100 V line (selected by DIP switch)
Input impedanceMic / call station 10 kΩ · AUX 4.7 kΩ · EMG line > 15 kΩ · EMG 100 V > 470 kΩ
Input sensitivityMic / call station −68 dBu (300 µV) · AUX left or right −11.8 dBu · AUX stereo −17.8 dBu
Signal-to-noise ratioMore than 100 dB (A-weighted, referred to rated power)
Warranty1 year

Specific references

MPNU240:1M-EU

Downloads

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Frequently asked questions about this product

Can the U240:1M drive speakers on a 100 V line?
Yes. It delivers its 240 W in high impedance, on a 100 V or 70 V line, as well as in low impedance into 4 or 8 ohms. The choice is made with DIP switches on the rear, and the speakers connect to a 4-pin Euroblock terminal, two pins for each mode.
How many sources can be connected?
Four, plus an emergency input. Two XLR mic/line inputs with switchable 48 V phantom power, and two RCA aux inputs whose stereo is summed to mono. The emergency input accepts a line signal or a 100 V line and takes precedence over all the others.
Does the music lower by itself during an announcement?
Yes. The VOX ducking function of the MIC2 input lowers the music by 0 to 45 dB as soon as a voice exceeds the set threshold. A call station connected to MIC1 through its 5-pin Euroblock connector also overrides the music, introduced by a two-tone chime that can be disabled.
Can it be mounted in a 19-inch rack?
Yes. It takes up half a rack width at 1U high, and the supplied brackets fix it alone or side by side with a second unit of the series in the same rack unit. It can also stand on a table or be fixed underneath.
Is the amplifier noisy in operation?
Its fan is temperature-controlled in four stages, from off to fast, to cool without audible noise at low power. The output stage is class D, chosen for its efficiency, and a limiter protects the amplifier and the speakers from accidental overload.
Can it be switched off remotely?
Yes. A dry contact wired to the REMOTE OFF terminal puts the unit in standby, where it only draws 1.25 W. This is handy to turn off a shop's sound system from the electrical cabinet or a timer, without touching the amplifier.
Which call station should be used with the U240:1M?
Dynacord specifies it with the PLE-1CS call station, which connects to the MIC1 input through a lockable Euro connector and triggers the priority contact. The PLE-1SCS heavy-duty call station, from the same Plena range, uses the same connection with a heavier metal base.

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