The DSPPA DMA350U is a 350W digital mixer amplifier that still delivers 175W from a DC 24V supply, with a switch to choose 100V or 4-16 ohm output. It suits hotels, event halls, factories and smaller mosques that run paging and music on one speaker line.
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The DSPPA DMA350U is a 350W digital mixer amplifier whose standout trait is that it keeps running at 175W from a 24V DC source. That matters in buildings where paging cannot stop during a power cut, such as hotels, factories and event halls. A rear switch sets the output to 100V for long speaker lines or 4-16 ohm for large low-impedance cabinets.
DSPPA DMA350U power on mains and on 24V
DSPPA's datasheet lists two power figures for this model, and knowing both helps when you plan backup:
- 350W on AC mains, 110-115V or 220-230V selected by a rear switch.
- 175W on a 24V DC supply, through a DC input labelled 26A.
- 100V constant-voltage or 4-16 ohm output, set by the mode switch.
- Operating range of -10 to 50°C and 20-80% humidity.
In practice, if your speakers add up to nearly 350W, expect lower volume on backup, since DC output is half the mains rating.
Music and paging in one box
Pick a source with the MODE button or the remote: Bluetooth from a phone, files on a USB stick, FM radio, or an external player on AUX1. Every input has its own level control, plus bass and treble at ±10dB. When reception staff speak into MIC1, their voice takes over from the music, which returns once the announcement ends. Chime 1 and Chime 2 buttons on the front play a tone at level 0-15.
Emergency and alarm inputs
Three rear control terminals handle emergencies. The EMC input, at 350mV sensitivity, accepts a pre-recorded message from another device. The SIREN input sounds an alarm on a contact closure and has its own alarm output. The MUTE input silences the system remotely. Official priority runs MUTE, then EMC, alarm and chime, then MIC1, then the rest.
Microphones and connections
MIC1 sits on the front; MIC2 and MIC3 are balanced rear inputs with switchable 48V phantom, and MIC3 doubles as AUX2. An AUX OUT sends the same program to a second amplifier or a recorder. The unit measures 430 x 380 x 88 mm.
Where the DMA350U fits in Saudi Arabia
- Hotels and serviced apartments in Makkah and Madinah: corridor paging and lobby music.
- Event halls and istirahas: a mic for speeches and music from a phone.
- Factories and workshops: paging over horn speakers with a siren.
- Smaller mosques: prayer hall speakers on a single 100V line with a condenser mic for the imam.
DMA350U, DMA250U or DMA500U?
The DMA250U gives 250W and keeps a 70V tap. The DMA350U moves up to 350W, delivers 175W on DC and replaces the 70V tap with a 100V or 4-16 ohm switch. The DMA500U shares the same size and inputs but offers 500W on mains, 250W on DC and a 33A DC input. Choose the DMA350U when your speakers total 250W to 350W.
Frequently Asked Questions
What power does the DMA350U give on a 24V supply?
175W according to the official table, versus 350W on mains. The rear DC input is labelled 26A.
Does it support 70V speakers?
No. The official table lists 4-16 ohm and 100V outputs only for this model. For 70V lines, choose the DMA250U or DMA120U.
Can I use a condenser microphone?
Yes. The rear MIC2 and MIC3 inputs have switchable 48V phantom power.
Specifications
- Model: DMA350U
- Series: DMA60U Series (DMA60U to DMA650U)
- Rated output (AC): 350W
- Rated output (DC 24V): 175W
- Speaker output: 4-16Ω or 100V (constant voltage), switch-selectable
- Microphone inputs: MIC1 front, MIC2 and MIC3 balanced on rear
- AUX inputs: 2 (AUX2 shared with MIC3 via selector switch)
- Emergency input: 1× EMC input
- Line output: 1× AUX OUT
- Phantom power: +48V for MIC2/MIC3, rear switch
- MIC1 / MIC2 sensitivity: 10mV ±1mV
- AUX1 / AUX2 / EMC sensitivity: 350mV ±50mV
- MIC frequency response: 120Hz-12kHz (±3dB)
- AUX frequency response: 80Hz-15kHz (±3dB)
- THD: <1%
- SNR (A-weighted): AUX ≥75dB, MIC ≥71dB
- Tone controls: Bass and treble ±10dB (±2)
- Built-in sources: USB, Bluetooth, FM radio (with FM antenna socket)
- Chimes and alarms: Chime 1 and Chime 2 (level 0-15), SIREN short-circuit trigger with alarm output, MUTE short-circuit trigger
- Priority: MUTE > EMC = Alarm = Chime > MIC1 > others (no chime during alarm)
- Control and display: Segment display, IR remote control, power-off memory
- AC power supply: AC 110-115V or AC 220-230V, 50/60Hz (switchable)
- DC input (rear-panel label): 24V / 26A
- Rear-panel switches: Output mode switch (4-16Ω / 100V), AC voltage selector, phantom switch, AUX2/MIC3 selector, MIC and alarm gain
- Operating temperature: -10 to 50°C
- Relative humidity: 20% to 80%
- Dimensions (D × W × H): 430 × 380 × 88 mm
Features
- 350W on mains and 175W on DC 24V: paging carries on from a backup supply during a power cut.
- Output mode switch for 100V or 4-16 ohm: a long 100V line of ceiling speakers, or a pair of large low-impedance cabinets.
- Mic inputs with 48V phantom on MIC2 and MIC3: a handheld and a condenser desk mic on one unit.
- USB, Bluetooth and FM with a segment display: background music from a phone or flash drive, source visible at a glance.
- EMC, SIREN and MUTE inputs: accept an emergency message, sound a siren or mute from another system.