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Amplifiers dissipate much of the power they consume in heat. The
KMA-160 should be installed in a location that provides unobstructed
ventilation. If you have to install the units on shelves or in a
cabinet, extra ventilation might be necessary. This can be easily
done with fans in a variety of ways. Generally, with the front and
rear open, 2 - 3 inches clearance each side and 8 inches above the
amplifier, ventilation will be adequate.
The dimensions of the KMA-160 are: 23" wide x 22" deep x 9 high.
The units weigh 80 pounds each; shipping weight is i00 pounds each.
INPUT CONNECTIONS
The KMA-160 has bo~h balanced and single-ended inputs. The balanced
input uses the 3-pin XLR connector and the single-ended input uses
the RCA connector. The pin assignment for the XLR’s is: pin 1 =
signal ground; pin 2 = non-inverting input; pin 3 = inverting input.
The RCA connector is wired in parallel with pin 2, the non-inverted
input. Only one of these inputs should be connected to a
preamplifier.
The input that is not connected to the preamplifier can be used as an
output to a second amplifier for power-biamp applications. Before
proceeding with such an installation you should consult your Dealer
or the factory.
INSTALLATION
After inspection of the amplifiers for any shipping damage they are
ready for instaila~ion. The wiring to and from the amplifiers, and
all components in general, should be arranged in a neat, organized
manner. Specifically, AC wires should be separated from audio wires.
This avoids hum or other unwanted noise from being induced into the
system.
The KMA-160 has four sets of five-way binding post speaker
connectors. These are wired in parallel and have identical function.
It is always preferable to run long interconnect cables to the
amplifiers and keep speaker cable length to a minimum. Speaker cable
does add impedance between the amplifiers, regardless of its guage.
All KRELL amplifiers will drive the lowest impedances with ease. When
impedance is added in any significant amount, amplifier power is
literally wasted in driving the cable, thereby reducing the maximum
power that can be delivered to the speaker.
The feet on the KMA-160 can be used two different ways. They are made
from machined aluminum and are supplied with separate rubber bottoms
and mounting screws. The rubber bottoms can be screwed into the the
feet for protection of fragile surfaces such as hardwood floors or
furniture. For use on rugs we recommend using the feet without the
rubber bottoms.