The DSPPA DA3650 is a single-channel Class-D power amplifier rated at 750W RMS, feeding one 70V or 100V speaker line. It suits buildings where all the audio is one large zone, such as a factory floor, a big hall or a mosque with many speakers on one line.
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The DSPPA DA3650 keeps things simple: one channel, 750W RMS, feeding a 70V or 100V speaker line. There are no zones to split and few settings to manage, just an audio source going in and a long speaker run coming out. It suits factories, wedding halls and mosques where the whole sound system works as a single zone and you want serious power from one box.
DSPPA DA3650 specifications
The DA3650 is the top model of the DA3350, DA3450 and DA3650 range. The three share chassis and connections and differ only in power and consumption.
- Power: 750W RMS on one channel.
- Output: 70V and 100V with a common terminal, set by a rear switch.
- Frequency response: 80 Hz to 16 kHz; THD 1% or less.
- Signal-to-noise ratio: 80 dB or more.
- Rated consumption: 900W on AC 220V.
XLR and 6.35 mm inputs with loop-through
The rear panel has an XLR input and a 6.35 mm input, plus a loop socket of each type. Feed the mixer into this unit and pass the signal on to a second or third amplifier, so several amps play the same program without a separate splitter. The minimum source level is 1000 mV, which means line-level audio from a mixer or preamplifier rather than a microphone plugged in directly.
Long-distance switch
On speaker runs of hundreds of metres, the far end of the line gets quieter. The long-distance switch lifts output dynamics to compensate, and its green indicator goes out when it is engaged. DSPPA advises care when the line is short and the connected speakers total under 30W, so the speakers are not overdriven.
Protection and clear indicators
The amplifier protects itself against over-temperature, DC on the output and short circuits, and it resumes on its own once a short is cleared. Five front LEDs show 70V mode, signal, clip, protection and temperature. If the clip LED lights, back the volume off to avoid distortion.
Where the DA3650 works in Saudi Arabia
- A large mosque with indoor and outdoor speakers on one line.
- A factory or workshop in an industrial city that needs clear staff paging.
- An event hall or sports hall run as one audio zone.
- Boosting an existing system by looping the signal from an amplifier already installed.
Installation and power
The unit measures 483 x 380 x 88 mm and weighs 7.7 kg net. It runs on AC 220V; the datasheet does not mention a 24V DC input, so if battery backup is a requirement, look at the 2-channel DA models instead.
DA3650, DA3850 or DA2500?
The DA3850 uses the same chassis but gives 1500W or more on a 100V line and 750W on 70V, drawing 2700W against 900W here. The DA2500 splits 1000W across two channels in 1U and adds 24V DC and priority inputs. Pick the DA3650 for one zone that needs up to 750W with straightforward XLR wiring.
Frequently Asked Questions
How many speakers can the DSPPA DA3650 drive?
Keep the total speaker wattage on the line within 750W. With 20W wall speakers that is roughly 37 units, leaving a little headroom.
Can the DA3650 run on a 24V battery?
The official datasheet lists AC 220V only and no 24V DC input. For battery operation, the 2-channel DA models such as the DA2250 and DA2500 accept 24V DC.
Can I chain several DA3650 units from one mixer?
Yes. The rear panel has XLR and 6.35 mm loop sockets, so one cable carries the signal from the first amplifier to the next.
Specifications
- Model: DA3650
- Type: 1-channel Class-D digital power amplifier
- Series: DSPPA DA3350 / DA3450 / DA3650
- Channels: 1
- RMS power: 750W
- Speaker output: 70V and 100V constant voltage with common terminal, rear switch
- Minimum source EMF: ≤1000 mV
- SNR: ≥80 dB
- Frequency response: 80 Hz to 16 kHz (±3 dB)
- THD: ≤1% (1 kHz, normal condition)
- Inputs: XLR input and 6.35 mm input
- Loop-through: XLR and 6.35 mm loop sockets to feed another amplifier
- Long-distance switch: Boosts output dynamics to offset long-cable loss (green indicator)
- Front panel: Lit power switch, volume knob, ventilation window
- Indicators: 5 LEDs: 70V, signal, clip, protection, over-temperature
- Protection: Over-temperature, DC, short circuit (auto recovery)
- Cooling: Rear fan
- Power supply: AC 220V / 50 Hz
- Rated power consumption: 900W
- AC fuse: F8AL250V
- Unit dimensions: 483 × 380 × 88 mm
- Net weight: 7.7 kg
Features
- 750W RMS on one channel: drives a large speaker zone from a single output.
- XLR and 6.35 mm inputs with 2 loop sockets: chain several amplifiers from one audio source.
- Long-distance switch: compensates for signal loss when speaker cables run far.
- Over-temperature, DC and short-circuit protection: recovers automatically once a short is cleared.
- 5 front LEDs: 70V mode, signal, clip, protection and temperature at a glance.