DESCRIPTION

The DPA is a class-D digital power amplifier with extremely low power consumption (0.2W per channel) during standby mode, and high amplification efficiency of 90%. A four-step DIP switch can be configured to enable/disable the function of standby mode (power-save mode) when powered by AC mains; to request the LEDs on the front panel to comply to EN54-16; and to enable/disable the battery monitoring.

The amplifiers are powered by 100 VAC ~ 240 VAC 50/60 Hz or 48 VDC battery backup. Each model has the line inputs with individual volume gain, status LEDs (power, battery, fault, general fault, overload and signal) on the front panel, and the DPA models can bridge two channels to double the power wattage.

There are four models in the DPA range:

• DPA-8060: 8 x 60 Watt
• DPA-4125: 4 x 125 Watt
• DPA-4250: 4 x 250 Watt
• DPA-2500: 2 x 500 Watt

FEATURES

• Class-D amplification performance and energy-efficient design
• Universal switch mode power supply with PFC (Power Factor Correction)
• Full protection circuitry against over/under AC voltage, overload, overheat, short-to-ground or short circuit on speaker lines
• Four models available: DPA-8060 (60W x 8CH), DPA-4125 (125W x 4CH) and DPA-4250 (250W x 4CH) and DPA-2500 (500W x 2CH)
• Support bridging two channels to double the power wattage
• Airflow cooling by internal speed fan temperature controlled
• Applicable for full scale of system applications: hotel, railway, airport, houses of worship, educational and sports facilities, club etc.

SPECIFICATIONS

Electrical

• AC power input: 100 VAC ~ 240 VAC ±10%, 50/60 Hz
• DC power input: 43 ~ 56 VDC
• Amplifier outputs
  • US type: 70V, 35V, 4 ohm
  • EU type: 100V, 50V, 4 ohm

Audio

• Frequency response: 50 Hz and 20 kHz (±3 dB) @ 0 dBu
• SNR: > 90 dB
• THD: < 0.1% @ 1 kHz
• Max input level: 0 dBu
• Input impedance:
  • DPA2500: 10k ohm
  • DPA8060/DPA4125/DPA4250: 12k ohm
• Crosstalk: > 70 dB @ 0 dBu gain

Mechanical

• Dimensions (W x H x D):
  • DPA-8060: 437 x 88 x 400 mm
  • DPA-4125: 437 x 88 x 370 mm
  • DPA-4250: 437 x 88 x 387 mm
  • DPA-2500: 437 x 88 x 387 mm

APPLICATIONS

• Schools
• Stores
• Shopping malls
• Hotels
• Train stations
• Universities
• Industrial sites

Case studies

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