Dynacord Power Amplifier DPA 4245, Руководство пользователя

Страница: 6 / 17

20
figure: block diagram input channel A figure: printed board assembly area
channel A – transformer retrofitting
Level Control
dB-scaled rotary controls for adjusting the power amplifier’s overall
amplification. This control should be positioned between the 0 dB and
the -6 dB marks to prevent distortion in source devices. The labeling
indicates the actual attenuation applied to the internal specified factor
of amplification.
Input Routing
If the switch is set to parallel/mono, the input connectors CHANNEL
A and CHANNEL B are electrically linked for direct parallel operation.
With only a single audio signal source connected, both channels are
driven, while their volume levels are still individually controlled via the
level controls A and B.
If the switch is set to its dual/stereo position, channels A and B are se-
parately amplified (two channel or stereo mode).
Power Outputs A&B
The loudspeaker cables are connected to the power amplifier through high-performance binding posts
– with the necessary screw-plugs being supplied. For connection purposes, it is possible to remove the 12-
pole terminal plug. Cables with a maximum diameter of 2.5 mm2 can be utilized. To provide flexible connec-
tions, all floating output voltages – 25 V, 70 V, and 100 V (ISOLATED OUTPUTS) – as well as the low-impe-
dance output (DIRECT OUTPUTS) of both channels are directly accessible.
LEVEL
0 dB
-9
-16
-30
-1
-4
-2
-3
-5 -6
-12
DUAL/STEREO
PARALLEL/MONO
INPUT ROUTING
70 100 0 100 70 0
+ +
25V
100V
+ 70V +
+
ISOLATED OUTPUTS
DIRECT OUTPUTS
BRIDGED
1200W/8
600W
+
LOW IMPEDANCE
AUDIO TRANSFORMER OUTPUTS
100V
+
25V + 70V +
B A
4
DUAL B A
figure: power outputs of the DPA 4260