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Specifications
We follow a policy of continuous advancement in
development.
For this reason all or part of specifications & designs
may be changed without prior notice.
15
DLS REFERENCE RA50
Number of channels 5
Working mode AB
Power output at 13,8 Volt, 20 Hz - 20 kHz, max 0,1 % THD, all channels driven.
Power output in 4 ohm 4 x 70 W + 1 x 265 W
Power output in 2 ohm 4 x 110 W + 1 x 365 W
THD @1 W < 0,1%
Signal to noise ratio, A-weighted >100 dB
Damping factor >200
Frequency response +/- 0,5 dB 10 Hz - 50 kHz
Input impedance, low level >10 kohm*
Input impedance, high level 330 ohm*
High level input with auto start Yes
Input sensitivity 0,5 - 8V
Filter slope 12 dB / octave
* can be switched Low/High level and Auto Start
Pre amp configuration on Front channels:
Filter high pass 50 - 140 Hz**
Filter Low pass 250 - 700 Hz** (Freq. x 1, x 10 switch)
** can be switched in/out
Pre amp configuration on Rear channels:
Filter high pass 50 - 140 Hz** (Freq. x 1, x5, x50)
** can be switched in/out
Pre amp configuration on RA50 sub channel:
Filter lowpass 40 - 125 Hz
Fixed subsonic filter 25 Hz, 18 dB/octave filter slope***
Phase shift 0-180 degrees continously Yes
Grand bass adjustable gain @ 40 Hz 0 - +18 dB
Remote bass level and phase control Yes***
*** can be switched in/out
Protection current, thermal & DC offset
Max cable size, DC input 4 AWG, 21 mm
2
Max cable size, front speakers 10 AWG, 6 mm
2
Max cable size, sub output 7 AWG, 10 mm
2
Power consumption:
Idle 1,2 A
Maximum 90 A
Fuse 3 x 30 A, ATC-type
Dimensions HxWxD(mm) 59x479x245
Dimensions (inch) 2,33x18,855x9,65
Weight 5,5 kg / 12,1 lb
RA50
NOTE!
Channel 1 - 4 amplifiers are 2 ohm stable. You can
connect loads down to 2 ohm on each channel.
When connecting in mono bridge mode (CH1-2 &
CH 3-4) it is possible to connect one 4 ohm speaker
on each channel pair. In bridge mode connection an
amplifier sees a 4 ohm speaker as a 2 ohm load.
The sub channel on RA50 can handle 2 ohm loads,
for example two 4 ohm subwoofers in parallel.
15


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