Basic Installation And Operation - Krell Industries Power Amplifiers MDA-300/500 Owner's Reference Manual

C. BASIC INSTALLATION
AND OPERATION
1. Place the MDA-300/500, on a firm level surface away
from excessive dirt or moisture. Ideally the amplifiers '
should be placed as close, to the speakers as possible. ,It is
always preferable torun long interconnect cables to tt~e
amplifiers and keep speaker cable length t.o a minimu~m..
Speaker cable does add an impedance at tt~e output ot the
amplifier, regardless of the cable. All KRELL amplifiers
will drive the lowest im. p.edances with ease. When imped-
ance is added, the amphfier's power is litera.lly wastedin
driving cable. Long speaker cables reduce tlae maximum
power that can be dehvered to the speakers.
2. Amplifiers dissipate much of the power they consume
in heat. The MDA-300/500s 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 m~¢ be necessary_. This can be accomplished
with "whisper - type fans. Consult your dealer for assis-
tance.
Generally, with the front and rear of a cabinet open, 2-3
inches of clearance on each side and 8 inches of clear-
ance above the amplifiers should provide adequate venti-
lation.
The exact dimensions for the MDA-300 and MDA-500
are in the Specifications Section below.
3. The MDA-300/500s should have a dedicated 20.amp.
line for each amplifier and should only be operated with
the power cords supplied. Use of other power cords may
damage the amplifiers or void its warranty. Please consult
KREEL or your dealer BEFORE using any devices de-
signed to alter or stabilize the AC pow.er fbr.the MDA-
300/500s. If you have any questions about placement or
AC power conditions please consult KREL-L.
4. The feet on the MDA-300/500s canbe used in several
different ways. They are made from machined Delrin and
are supplied witla separate threaded rubber b~ottoms. The
rubber bottoms can be screwed into the feet tor protec-
tion of fragile surfaces such as hardwood floors or furni-
ture. For use on rugs, we recommend using the fee.t with-
out the rubber bottoms. MDA-300/500s feet can also
accept the KREL. L AMDs (A, coustic Mass Damper).
These improve the amplifier s sonic performance in most
installations.
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