HK Audio CPQ 10 - Manual (Page 4)

CPQ 10 1.0
4
1.3 RF Emissions
• The high frequency resonant converters in the CPQ 10 have been
designed to have very low radio frequency (RF) emissions; however
even these low level emissions can cause interference with other
equipment.
• In order for this to be minimised, the amplifier should be mounted in a
metal rack enclosure, which should have a separate (technical) Earth.
Alternatively a separate earth should be attached to the amplifier at
the rear rack mounting bracket.
2. Connecting To Your Amplifier
2.1 Inputs
The inputs are made via 3-pin XLR connectors, which are electronically
balanced and should be connected via a high grade twin core screened
cable, as follows:
XLR MALE:
2 1
3
PIN 1: Screen (see note)
PIN 2: Hot (signal +)
PIN 3: Cold (signal -)
The amplifier is designed to operate with fully balanced equipment and
ground loops or loss of performance may be experienced if connected
to unbalanced sources. If it is unavoidable however, the following wiring
should be used. The cable should still be twin core plus screen.
PIN 1: Screen - connected to the chassis of the unbalanced equipment
– or left disconnected at the unbalanced end.
PIN 2: Hot (signal +)
PIN 3: Cold (ground 0V)
NOTE: This amplifier is wired to the latest industry recommendations.
PIN 1 is connected directly to the chassis/mains earth. If ground loops
(mains hum) are encountered remove the screen connection from the
other end of the cable and leave it open circuit. If problems persist,
consult your dealer/supplier.
DO NOT TAMPER WITH OR ALTER ANY GROUND (EARTH)
CONNECTIONS INSIDE THE AMPLIFIER.
For bridged operation input should be made to channel A (or C) only
and the rear panel switch set for bridged mode for the appropriate pair
of channels.
2.2 Speaker Outputs
The speaker outputs are via Neutrik Speakon connectors. 2 pole
(NL2FC) or 4 pole (NL4FC) connectors can be used.
SPEAKON NL2 & NL4
2
1
2 1
PIN 1+: Hot
PIN 1-: Cold
Additionally Channel A Speakon connector carries Channel B output on
Pins +2 & -2 to allow easy bi-amping or bridged operation using a single
NL4 connector. Similarly, Channel C’s Speakon connector also carries
Channel D output.
Output Connector A
PIN 2+: Hot Ch. B
Pin 2-: Cold Ch. B
Output Connector C
PIN 2+: Hot Ch. D
PIN 2-: Cold Ch. D
For bi-amped operation, connect as above.
There must be no shared connections between channels. Negative
output terminals must not be joined together as they are not both at
ground potential. Connecting them together will damage the amplifier
and void the warranty!
As the currents involved are very high, and to ensure best performance,
the speaker cables should be kept as short as possible and conform to
the following minimum requirements:
20 A into 4 Ohm speaker loads
When operating the amplifier into loads of less than 4 Ohms, be aware
that the current capacity of the speaker cables will need to be increased
above the values quoted here. Do not connect the inputs/outputs to any
other voltage source such as a battery, mains source or power supply,
regardless of whether the amplifier is turned on or off. Do not run the
output of any amplifier channel back into another channel’s input and
do not parallel or series-connect an amplifier output with any other
amplifier output.
2.3 Bridged (Mono) Operation
Pairs of channels may be independently bridged — channel pair A&B,
and/or channel pair C&D. The method is the same for both channel
pairs: Supply signal to Channel A or C input only and push in the
appropriate rear panel switch marked “Bridge A&B” or “Bridge C&D”.
Use Channel A or C’s Output Speakon connector and connect as
follows:
PIN 2+: Hot
PIN 1-: Cold
When operating in bridged mode, the minimum impedances are
doubled. The minimum load in bridged mode is 4 ohms.