HK Audio CDR 210 F - Manual (Page 87)

87
I
Power Amp VX 2400
Figure 2: Ports on the VX 2400’s rear panel
4 Displays and Control
Features
4.1 Mains Switch
0: Power amp off
1: Power amp on
4.2 LED Indicators
LED indicator - Mains (green)
• Lights up continuously when the power amp is
switched on and is receiving mains voltage (power
amp is ready for operation).
• Extinguishes when the mains voltage is cut or the
amp is switched off.
LED indicator - Protect (red)
• Lights up continuously when the power amp is
overheated and the protective circuit has activated.
• Flashes at three-second intervals when the con-
nected speakers' impedance is too low (or in case
of a short circuit) and the protective circuit has
activated.
LED indicator - Signal (green)
• One for each channel
• Lights up when an audio input signal with a level
of at least - 16 dBV is patched into the power
amp's input.
LED indicator - Clip (red)
• Lights up to indicate that the amp has run out
of headroom and is exceeding its nominal power
output rating.
Turn the power amp down if the CLIP LED indicator
illuminates continuously. Note that it may flash
occasionally when the amp is used in setups with
HK AUDIO
® Digital Field Controllers. This is attri-
butable to the tolerance of some LEDs and the fact
that the DFC's limiter makes full use of the amp's
available output power.
4.3 Channel A, Channel B
Gain Knobs
Twist these knobs to adjust the levels if the two
power amp channels. Both Gain knobs are detent
potentiometers scaled in dB increments. Twist the
Channel A gain knob to adjust the level for the
speaker connected to Output A; twist the Channel B
gain knob to adjust the level for the speaker connec-
ted to Output B.
4.4 Circuit Breaker
The circuit breaker is on the VX 2400's front panel
(on older models, it is on the back panel). It cuts
the VX 2400's power supply in the event of a mal-
function. Unlike fuses, a circuit breaker that has
tripped can simply be switched back on again after
the problem has been remedied. This is convenient
because you don't have to worry about keeping a
supply of replacement fuses at hand.
Important note: Do not power the VX 2400 up
using the circuit breaker. Switch the VX 2400 mains
switch off before resetting the circuit breaker;
otherwise, you may destroy it.
4.5 Mode Selector Switch
Mono mode:
The two inputs are connected in a parallel circuit,
that is, a single input signal is routed to both power
amp channels. The output signals of both channels
are identical.
In mono mode (Mode selector switch is set to
Mono), patch the signal into the XLR port or jack of
channel A (Input A) or B (Input B). Connect spea-
kers to Output A and Output B using the Speakon
ports or binding posts. The overall impedance of
connected speakers may not be lower than 4 ohms
per power amp channel!