HK Audio CDR 210 F - Manual (Page 88)

Manual
COHEDRA
® & COHEDRA ® Compact
Stereo mode:
The power amp operates in dual-channel mode
(that is, using two independent channels).
In stereo mode (Mode selector switch is set to
Stereo), patch the signal into both channels' Input
A or Input B XLR ports or jacks. Connect speakers
to both power amp channels via Output A and
Output B using the Speakon ports or speaker
binding posts.
The overall impedance of connected speakers may
not be lower than 4 ohms per power amp channel.
Bridge mode:
The two channels are bridged to create a high-
performance, single-channel power amp.
In bridge mode (Mode selector switch is set to
Bridge), feed the signal in via the XLR port or jack
of channel A (Input A) or B (Input B). Connect
speakers to the Output A Speakon port with the pin
assignments pin 1+ / pin 2+, or to the two red binding
posts. Polarity is critical. Double-check to ensure
the polarity matches the polarity indicated the labels
on the speaker binding posts. The overall impedance
of connected speakers may not be lower than 8 ohms.
Twist the Channel A gain knob to adjust the level.
Biamp mode:
In biamp mode (Mode selector switch is set to
Stereo), connect an active crossover or controller
to the power amp's front end and drive high/mid
range enclosures and subwoofers using a four-wire
speaker cord. Patch the signal for the high/mid range
enclosure via the Input A XLR port or jack and the
subwoofer signal via the Input B XLR port or jack.
Connect the first speaker to Speakon Output A
(Output A + B) and daisy-chain the remaining spea-
kers. The overall impedance of connected high/mid
range enclosures and subwoofers may not be lower
than 4 ohms each. Twist the Channel A gain knob to
set the level for Channel A (mid/ high range enclo-
sure); twist the Channel B gain knob to set the level
for Channel B (subwoofer).
Important note:
The mode setting and the configuration of signal
routing cables must always match. If you operate
VX 2400 power amps in combination with a DFC,
make sure your set their Mode selector switches to
Stereo.
4.6 Limiter Switch
On: Activates internal limiters
Off: Deactivates internal limiters
4.7 Ground switch
On: Couples the audio signal's ground to the power
amp's ground.
Lift: Severs the audio signal's ground from the
power amp's ground to eliminate humming
caused by ground loops.
5 Connectors
5.1 Mains
The VX 2400's mains plug is a three-pole non-heating
equipment connector with a ground contact. Do not
connect the device to a power supply using anything
other than a three-pole connector with a ground
contact. The mains outlet must also be equipped
with a ground contact. Never use damaged cables,
plugs, or sockets.
5.2 Signal Input A, Input B
Each input channel of the VX 2400 is equipped with
one female XLR port and one 6.35 mm (1/4") stereo
jack; the two are connected via a parallel circuit.
The XLR port's pin assignments are:
pin 1 = ground, pin 2 = signal (+), pin 3 = signal (-).
The jack's pin assignments are:
sleeve = ground, ring = signal (-), tip = signal (+).
A mono 1/4" plug bridges the signal (-) and ground
contacts. If you insert a mono 1/4" plug, you will
patch an unbalanced signal into the power amp.
To connect an unbalanced signal source to the
VX 2400, it is recommended that you connect a
balanced cord to the VX 2400's input (using XLR or
stereo 1/4" plugs). Bridge the signal (-) and ground
wires or contacts at the other end of this cable (that
is, at the output of the unbalanced source).