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If you notice the fan is still engaged after playing through your SM-900, let it run for a couple of min-
utes to cool itself off. This will help extend the life of the internal components.
Upon powering up the SM-900, you will notice an initial turn-on transient heard as a "thud" in your
speakers. This will not harm speakers made by SWR, however, if you'd rather not hear this transient,
turn on the SM-900 first, and then attach your speakers. Just be sure you aren't playing when you
connect the speakers, as it may cause a speaker fuse to blow.
POWER SWITCH
Setting the power switch to the right "On" position activates the electronics in your SM-900 as
indicated by the power LED lighting on the front panel.
AC LINE (MAINS) FUSE
This fuse is provided to protect the internal electronics against power surges, etc. It also protects the
unit against itself should one of the internal components fail. If this fuse should open, replace
it with the same type of fuse and rating. Do not defeat the purpose of this feature by replacing this fuse
with a fuse of a higher value. It will void your warranty.
Proper size of the AC fuse for all countries is 3AG. Proper rating of the fuse is as follows:
United States: 8 amp, slo-blo
Japan: 9 amp, slo-blo
Europe (240V): 4 amp, slo-blo
AC CORD RECEPTACLE
The AC Cord receptacle accepts a standard AC power cable (supplied with the SM-900). If your AC cord
is lost, a replacement can be purchased at almost any electronics, computer or pro audio store.
Note: The rating for this cable is 3 conductor, 10 amperes MINIMUM. If replacement is necessary,
or if you wish to buy a longer cable, look for the rating on the cable and be sure it is at least 10
amps.
Make sure the AC cord is plugged all the way into both the amplifier and the wall socket. If your cord
ever becomes frayed or split, replace it immediately.
RACK MOUNTING YOUR SM-900
SWR's SM-900 is rackmountable, requiring no additional parts or accessories, other than rack screws
and the rack case itself. By installing your SM-900 in a rack case, you will help preserve its beauty and
protect the amp from accidental physical damage.
The SM-900 should be mounted as close to the bottom of the rack case as possible. The height of the
rubber feet was chosen so that when you slide the unit in the bottom of the rack case, the rack
mounting holes on the front panel should line up with the mounting holes of the rack rail. This prevents
the unit from flexing downward if the rack case is dropped. If you need to remove the rubber feet from
the bottom of the SM-900, be sure to replace the screws, as they reinforce the chassis.
If you must mount the SM-900 in the middle of the rack, a piece of wood or similar material should be
installed between the bottom of the rack case and the bottom of the SM-900. This will help prevent
flexing of the chassis. Although we have installed an additional steel bracket for strength, severe or
constant flexing of the chassis can cause the main chassis to weaken or crack and can void your
warranty.
Make sure there is adequate space between the sides of the SM-900 and the sides of the rack case
for proper ventilation.
SM-900 USER GUIDE • 15
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