Class-D Amplifiers The DPAfour amplifiers are primarily designed for integration into Voice Alarm systems, but thanks to its flexibility, it can also be used for any Public Address or Commercial application. DPAfour amplifiers are certified to the EN 54-16 standard.
DPAfour Digital Amplifiers

The DPAfour amplifier is a 2U high 19” rack mountable, 4-channel class-D power amplifiers, transformer isolated for 100 V, 70 V, 50 V and low-impedance distributed loudspeaker systems.

There are two models in the DPAfour range:

  • DPAfour125: 4 x 125 Watt
  • DPAfour250: 4 x 250 Watt

Each channel can be paralleled or bridged by combining 2 channels providing a single output with double the power or all 4 channels to provide a single channel with the power x 4.

The DPAfour can be powered by either a 110/230 VAC mains supply or 24 VDC supply able to support a battery back-up system for use in the event of mains failure and emergency evacuation systems.

DPAfour amplifiers have short-to-ground, short-circuit, overload and temperature overheat protection including line-impedance surveillance with a maximum of 5% deviation using the DIVA8 or IDA8 systems for loudspeaker-line surveillance. They support both single spur and redundant loop (A/B) cabling.

  • DPAfour125 : 4 x 125 Watt class-D power amplifier. Can be bridged into 2 x 250 Watt.
  • DPAfour250 : 4 x 250 Watt class-D power amplifier. Can be bridged into 2 x 250 Watt.
  • 2 U high, 19'' rack mountable
  • Quiescent current in sleep mode: 30 mA
  • Front panel indicators include : General Status (Power, Battery, Service) and General Fault, Detailed status (Signal, Clip, Fault and Ready)
  • 100 / 70 / 50 V & 4 ohms available via terminal block at the rear

Mains power supply

  • Voltage 115 or 230 VAC +/- 15%, 50/60 Hz
  • Power consumption** standby - idle* - Pmax
  • DPAfour125: 1 W - 38 W - 600 W
  • DPAfour250: 1 W - 44 W - 1169 W
  • ** (Total Mains-power consumption @ 230 VAC)
  • * (Alarm cycle + 10 V pilot-tone @ 24 VDC)

Battery power supply

  • Voltage: 19-30 VDC
  • Power consumption*** standby - idle* - Pmax
  • DPAfour125: 0.03 A - 1.45 A - 22.5 A
  • DPAfour250: 0.03 A - 1.65 A - 43.85 A
  • *** (Total DC-current @ 24  VDC)
  • * (Alarm cycle + 10 V pilot-tone @ 24 VDC)
  • Line inputs: 4 (one per channel)
  • Connector: 3-pin phoenix
  • Frequency response: +/- 3 dB @ 50 Hz and 20 kHz
  • S/N: > 90 dB
  • THD: < 0.1% @ 1 kHz
  • Input sensitivity: 770 mV
  • Input impedance: 20 KOhms

Loudspeakers outputs

  • DPAfour125
  • Rated load resistance: 80 Ohms (100 V)
  • Rated load capacitance: 62.5 nF (100 V)
  • DPAfour250
  • Rated load resistance: 40 Ohms (100 V)
  • Rated load capacitance: 120 nF (100 V)

Rated output power

  • DPAfour125: 125 Watt per channel (cont. at 40° C) - Two channels bridged 250 W (cont. at 40° C)
  • DPAfour250: 250 Watt per channel (cont. at 40° C) - Two channels bridged 500 W (cont. at 40° C)
  • Frequency response: 40 Hz to 20 kHz (-3 dB)
  • S/N: >  90 dB (no pilot tone)
  • Cross-talk: < 70 dB at nominal load for 1 kHz
  • Distortion: < 0.1% (@ 1 kHz) @ -10 dB of rated output power

Mechanical

  • Dimensions (H x W x D) 19'' rack use with brackets : 88.5 x 483 x 370 mm
  • Weight:
  • DPAfour125: 14 Kg
  • DPAfour250: 18 Kg
  • Mounting 19'' rack-mount
  • Color:  RAL70106

Environmental

  • Operating temperature: -5° C to +55° C
  • Storage temperature: -40° C to +70° C
  • Relative humidity: 15% to 90%
  • Air pressure: 600 to 1100 h PA


Type File Name Download
Catalog
[PDF] [en] PAVA_Catalog
[PDF] [fr] PAVA_Catalogue
Brochure
[PDF] [en] IDA8 System_Brochure
[PDF] [en] DIVA System_Brochure
Datasheet
[PDF] [en] DPAfour_Datasheet
[PDF] [fr] DPAfour_Fiche produit