Introducing the U240:1M, a 240 W mixer amplifier designed to cater to the demands of small to mediumsized installations, where paramount considerations include quality, performance, and unwavering reliability. This mixer amplifier is ideal for background music and crystal-clear voice announcement applications, making it a perfect fit for diverse environments such as bars, restaurants, retail outlets, educational institutions, houses of worship, museums, galleries, transport hubs, and conference centers. Thanks to its compact size, standing just one rack unit high and half rack wide, the U240:1M presents numerous installation possibilities, even in spaceconstrained settings. Included brackets facilitate both single and dual rack-mount configurations, while desktop and under-counter installations are equally viable. When rack-mounted side by side, two amplifiers can seamlessly inhabit a single rack unit, optimizing space utilization and effectively doubling both channel count and output power.

Product Features

• Rated output power: 240 W
• Versatile inputs: 4 inputs, 2 mic/line options with phantom power support
• Full power output supporting 4Ω, 8Ω, 70 V and 100 V
• EMG override input, ensuring critical messages are heard clearly
• Contact override with 2-tone chime for attention-grabbing alerts
• 70 Hz and 120 Hz high-pass filters to customize audio output and eliminate unwanted low-frequency noise
• Space-saving compact ½ rack design, providing versatility without compromising performance
• VOX Ducking that automatically adjusts background music volume for clear voice communication
• Remote activation of standby mode with Remote OFF (Stand by), enhancing energy efficiency

Product Specifications

Electrical

• Mains power supply
  • Voltage: 100 VAC - 240 VAC, 50/60 Hz
  • Power: 800 VA
  • Consumption:
    • Standby (Remote OFF active) 1.25 W
    • Idle mode 11 W / 12 W
  • Remote power (ON/OFF Stand by): 2-pin, Eurostyle, contact closure
• Performance
  • Frequency response, -3 dB ref. 1 kHz
  • Any input to output: <10 Hz — 22 kHz
  • Any input to LINE output: <10 Hz — 65 kHz
  • Distortion: <1% @rated output power, 1 kHz
  • Output stage topology: Class D
  • Equalization
  • Bass shelving: ±12 dB / 150 Hz — 3 dB (100 Hz)
  • Treble shelving: ±12 dB / 5 kHz — 3 dB (10 kHz)
  • Filter
  • LO-CUT permanently: f=20 Hz, 12 dB/oct.
  • LO-CUT switchable, can be activated: f=120 Hz, 12 dB/oct.

General

• Front status LEDs
  • Protect (Red): Protection, short circuit
  • Peak (Red): 1 dB before clip (input and output)
  • Signal (Green): Input and output signal
  • Call (Green): EMG / priority trigger / Vox input active
  • Power (Green): Power on condition
  • DIP switches: EMG (HiZ/LowZ), Two-tone Chime (ON/OFF), HPF (120 Hz), VOX (ON/OFF), Phantom power (+48 V/OFF) Output (HiZ/LowZ), Amp mode (70 V/100 V; 4Ω/8Ω)
• Protections
  • Amplifier: Audio limiters, high temperature, DC, HF, short circuit, over current protection
  • Switching mode power supply (µPC controlled): Mains over/under voltage protection, inrush current limiter, mains over current, high temperature
  • Remote power OFF: Contact closure
• Inputs
  • Number of inputs: 2 mic/line, 2 aux (+EMG)
• Sensitivity with all level controls in max. position
  • MIC / Call station: -68 dBu (300 µV)
  • AUX (only L or R): -22 dBu (60 mV)
  • AUX (Stereo) (L and R): -28 dBu (30 mV)
• Maximum input level
  • MIC / Call station: +8 dBu
• Input impedances
  • MIC / Call station: 10 kΩ
  • AUX: 4.7 kΩ
  • EMG (Line): >15 kΩ
  • EMG (HiZ): >470 kΩ
  • LINE (L and R): 75 Ω
  • Noise, MIC input to output, Aweighted, (HiZ 100 V): -58 dBu
• Input 1
  • Type: Mic/Line, contact override with chime
  • Connector: 3-pin XLR, balanced / 5-pin Eurostyle, balanced (3 pin for input, 2 pin for trigger
  • Dynamic range: 61 dB (Mic gain min — max)
  • S/N (A-weighted): ≥98 dB
  • Phantom power supply, switchable: 48 V DC
• Input 2
  • Type: Mic/Line, VOX ducker override
  • Connector: 3-pin XLR, balanced
  • VOX Ducking: Ducking control 0 dB — -45 dB
  • VOX Threshold: -60dBu — +8 dBu, adjustable
  • Dynamic range: 61 dB (Mic gain min — max)
  • S/N (A-weighted): ≥98 dB
  • Phantom power supply, switchable: 48 V DC
• Input 3
  • Type: Line
  • Connector: RCA (chinch), stereo converted to mono, unbalanced
  • S/N (A-weighted): ≥98 dB
• Input 4
  • Type: Line
  • Connector: RCA (chinch), stereo converted to mono, unbalanced
  • S/N (A-weighted): ≥98 dB
• EMG Input
  • Type: Line; 100 V
  • Connector: 2-pin, balanced
  • S/N (A-weighted): ≥98 dB
• Loudspeaker output
  • Connector: 4-pin Eurostyle (2 pin for LowZ, 2 pin for HiZ)
  • Rated output power: 240 W
  • Max output voltage, 1 kHz, THD=0.5%, no load:
    • 4 Ω 8 Ω 70 V 100 V
    • 31 VRMS 45 VRMS

Mechanical

• Enclosure
  • IEC protection class: Class I (grounded)
  • Dimensions (HxWxD), without accessories: 44.2 mm x 218 mm x 217.7 mm (1.74 in x 8.6 in x 8.57 in)
  • Colour in RAL: RAL 9017 Traffic black
  • Net weight (without accessories): 1.85 kg (4.07 lb)
  • Net weight (with accessories): 2.31 kg (5.09 lb)
  • Shipping weight: 2.67 kg (5.88 lb)
  • Mounting: Stand-alone; 19" rack; rack side-byside; half 19" rack; table-top; undertable
• Environmental
• Climatic conditions
  • Cooling concept: Four-stage-fans (Off / Slow / Medium / Fast)
  • Operating temperature: -5°C — 45°C (23°F — 113°F)
  • Storage temperature: -40°C — 70°C (-40°F —158°F)