The DSPPA DA4250 is the high-power member of the four-channel DA range: 250W per channel and 1000W in total on 70V or 100V lines, all in a 1U chassis. It is aimed at large sites such as malls, hotels and big mosques where every zone carries a long speaker run.
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The DSPPA DA4250 is the most powerful four-channel model in the DSPPA DA digital series (DA4060, DA4125 and DA4250). It puts 250W on each channel, 1000W in total, into a chassis just 1U high. It is meant for big projects where every zone carries a long run of speakers: shopping malls, hotels, commercial complexes and large mosques with outdoor courtyards.
DSPPA DA4250 output per zone
A 250W channel can carry a long 100V speaker line. Twenty ceiling speakers tapped at 10W total 200W and leave headroom; four 50W horn speakers can cover an outdoor courtyard. Each channel has its own volume knob, so corridor level stays independent of the food court or the car park.
- 4 x 250W channels, 1000W total.
- 70V or 100V output, set by a rear-panel switch.
- Channel separation above 70dB.
- Signal-to-noise ratio above 80dB; THD below 0.3%.
- Frequency response from 80Hz to 15kHz.
Mains load and battery backup
At 1000W of output, plan the electrical load before installation. The DA4250 draws 1240W at 220V AC. It also runs from a 24V DC battery supply, drawing 708W with rated output reduced by 3dB, so paging continues through a mains failure if your battery system is sized for that load. Accepted mains range is 180 to 250V at 50/60Hz, with active PFC.
Priority paging and linking amplifiers
The rear panel carries a balanced line input and two priority inputs: one balanced, one at 100V. Any page above the threshold mutes the normal programme, and music returns 2 to 3 seconds later. The balanced line output passes the signal on to a second amplifier in another equipment room, which helps in malls and towers. All inputs are line level, so put a preamp or mixer such as the MP9811P in front for microphones.
Cooling and protection for long hours
Malls and hotels play background music for many hours a day. The DA4250 relies on a Class-D output stage, an efficient switch-mode power supply and a fan that speeds up as temperature rises. Protection covers over-temperature, short circuit, DC and power-on, with a voltage limiter and LEDs for protect, signal and clip.
Where the DA4250 fits in Saudi Arabia
- Malls and commercial complexes: separate channels for corridors, food court, parking and plazas.
- Hotels in Makkah, Madinah and Riyadh: lobby, restaurants, ballrooms and guest corridors.
- Large mosques: horn speakers for outdoor courtyards and wall speakers for prayer halls.
- Warehouses and factories: paging across wide floor areas with horn speakers.
DA4250, DA4125 or DA2500?
The DA4125 shares the same chassis, inputs and weight but delivers 120W per channel (480W total) and draws 653W, which suits schools and mid-size buildings. The DA2500 gives 500W per channel but only two channels, drawing 1270W. Choose the DA4250 when you need four separate zones and each zone needs up to 250W of speakers.
Frequently Asked Questions
What is the total output of the DA4250?
1000W across four channels, 250W each on a 70V or 100V line, with a separate volume knob per channel.
How much power does it draw?
Per the official datasheet: 1240W at 220V AC and 708W on 24V DC. Size your circuit and battery system for that load.
Can I connect 8-ohm speakers?
The published specifications list 70V and 100V outputs only, so use speakers fitted with 100V line transformers.
Specifications
- Model: DA4250
- Series: DSPPA DA Class-D series (DA2125 / DA2250 / DA2500 / DA4060 / DA4125 / DA4250)
- Type: Class-D digital power amplifier
- Channels: 4
- Rated output per channel: 250W
- Total rated output: 1000W (4 × 250W)
- Speaker output: 70V / 100V with real-time selector switch
- Input sensitivity: 775 mVRMS (0 dBV, all balanced inputs); 100 VRMS (100V unbalanced input)
- Signal-to-noise ratio: Above 80 dB (at 100 VRMS output)
- Input impedance: 60 kΩ (balanced); 20 kΩ (balanced priority); 100 kΩ (100V unbalanced)
- Channel separation: Above 70 dB (1 kHz)
- Frequency response: 80 Hz to 15 kHz (±3 dB, normal operation)
- THD: Below 0.3% (1 kHz, normal operation)
- Slew rate: Above 29 V/µs
- Priority threshold: Above 10 mVp (balanced priority input); above 1000 mVp (100 VRMS priority input)
- Rear inputs and outputs: Balanced line input (3-pin HT-3.81), balanced priority input (3-pin HT-3.81), 100 VRMS unbalanced priority input (2-pin HT-3.81), balanced line output (3-pin HT-3.81), 70V/100V speaker output on covered 7.62-4P socket
- Priority behaviour: A priority signal above threshold mutes the normal balanced input, which returns 2 to 3 s after the signal drops below threshold
- Front panel: Volume knob per channel, power switch with indicator, 5-unit LED status display
- Indicators: PRO, LIM, voltage limit, SIG, 70V gear
- Protection: Power-on, high temperature, DC, short circuit, plus voltage-limit circuit
- Amplifier stage and PSU: Class-D stage with switch-mode power supply and active PFC
- Cooling: Temperature-controlled fan speed, rear air outlet
- Power supply: AC 180-250V, 50/60 Hz; DC 24V (rated output -3 dB)
- Power consumption: 1240W (AC 220V); 708W (DC 24V)
- Chassis dimensions (excl. feet): 483 × 435 × 44 mm (1U)
- Feet: 4 removable soft plastic feet, 6.5 mm
- Net weight: 7 kg
- Mounting: 19-inch rack, 1U, or flat surface
Features
- 1000W in 1U: four 250W channels cover large areas from a single rack slot.
- Channel separation above 70dB: food-court music stays out of the corridor zone.
- Balanced line output: pass the signal to a second amplifier with less noise as the system grows.
- 24V DC input, 708W draw: paging keeps running from backup batteries in a power cut.