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Krell KAV–2250 and KAV–3250 11
Connecting the Amplifier to Your System
INPUT AND OUTPUT CONNECTIONS
The amplifier is equipped with balanced and single-ended inputs.
Krell recommends using balanced interconnect cables. Balanced interconnect cables
not only can minimize sonic loss but are also immune to induced noise, especially with
installations using long cables. Balanced connections have 6 dB more gain than single-
ended connections. When level matching is critical, please keep this gain value in mind.
The amplifier is shipped with shorting pins in the XLR inputs. These pins should remain
in the XLR inputs if the amplifier is operating in the single-ended mode. When the
shorting pin is inserted, pins 1 (lower left) and 3 (top) are shorted together. Remove the
shorting pins to connect the amplifier for balanced operation.
The XLR pin configuration is described below:
Pin 1 Shield (ground)
Pin 2 Non-inverting (hot) (0°)
Pin 3 Inverting (cold) (180°)
Follow these steps to connect the amplifier to your system.
1. Make sure all power sources and components are off before connecting inputs and
outputs.
2. Neatly organize the wiring between the amplifier and all system components.
Separate AC wires from audio cables to prevent hum or other unwanted noise from
being introduced into the system.
3. Connect the interconnect cables from your output device to the amplifier inputs using
the balanced or single-ended inputs located on the back panel: (4) and (6) on the
KAV–2250 or (5) and (7) on the KAV–3250. The balanced inputs use three-pin XLR
connectors; the single-ended inputs use RCA connectors.
IMPORTANT
Use only one input to each amplifier channel at a time.