DPAfour125
Digital Power Amplifiers - EN 54-16
DPAfour125
Security Amplifiers, EN 54-16
 
The DPAfour125 is a 2U high 19” rack mountable, 4-channel class-D power amplifier, transformer isolated for 100 V, 70 V, 50 V and low-impedance distributed loudspeaker systems. Each amplifier can deliver up to 1000 Watt when used in bridged mode or in separate channels of 125 or 250 Watt.
 
This amplifier has a dual voltage mains 110/230 VAC and a 24 VDC battery back-up input which allows it to be used in combination with a battery backup system for maximum availability and durability in an emergency evacuation system. There are 3 types of power amplifiers available in the DPA four range of products.
•       DPAfour125: 4 x 125 Watt class-D power amplifier.
        It can be bridged into 2 x 250 W.
•       2U high, 19-inch rack mountable.
•       Quiescent curent in sleep mode: 30 mA.
•       Front panel indicators include:
•       General status: Power, Battery, Service and General Fault.
        Detailed status: Signal, Clip, Fault and Ready
        (Ready = out of sleep mode).
•       100 / 70 / 50 / 4 Ohm available via terminal blocks at the rear.
•       Output channels can be linked into 2 x 250 W or 2 x 500 W
        by daisy-chaining 50 V tapping (input on parallel).
•       Combines with the BECS150 charger and back-up supply.

At the rear of the DPA you will find:
•       Mains switch with fuse
•       Individual level adjusters
•       General fault contact (Dry contact)
•       Commercial use disabled contact
•       Lamp test input contact

Electrical

Mains power supply
Voltage 115 or 230 VAC ±15%, 50/60 Hz
Power consumption** standby - idle* - Pmax
DPA4125 1 W – 38 W – 600 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* - Imax
DPA4125 0.03 A – 1.45 A – 22.5 A
***(Total DC-current @ 24 VDC)
*(Alarm cycle + 10 V pilot-tone @ 24 VDC)
Line inputs - 4 x (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 kOhm
Loudspeakers outputs DPA4125
Rated load resistance 80 ohm (100 V)
Rated load capacitance 62,5 nF (100 V)
Rated output power
(per channel) 125 W (cont. at 40°C)
Two channels bridged 250 W (cont. at 40°C)
Frequency response 40 Hz to 20 kHz(-3 dB)
S/N >90 dB (no pilot tone)
Crosstalk <70 dB at nominal load for 1 kHz
Distortion <0,1% (@ 1 kHz)
@ -10dB of rated outputpower
Mechanical
Dimensions (H x W X D) 19” rack use, with brackets 88,5 x 483 x 370 mm
Weight: DPA 4125 14 kg (31 lb)
Mounting 19”-rackmount
Colour RAL7016
Environmental
Operating temperature -5 ºC to +55 ºC (+23 ºF to +131 ºF)
Storage temperature -40 ºC to +70 ºC (-40 ºF to +158 ºF)
Relative humidity 15% to 90%
Air pressure 600 to 1100 h Pa

 

The figure below shows a block diagram of DPAxx. The individual blocks described above are easily visible. On the standard unit the serial interface is not provided. The logic inputs and outputs are programmable.