Infinity SM Series User Manual

Your INFINITY speakers will deliver unusually even response in actual
home listening environments well in excess of its conservative laboratory
specifications.
NOMINAL IMPEDANCE refers to how much current is required, on the
average, from an amplifier for a given voltage at its output terminals. A high
impedance speaker will require less current than a low impedance speaker.
Impedance is not an indication of quality or accuracy in a loudspeaker.
Solid state amplifiers, properly designed and constructed, will generally put
out more power at 4 ohms. Ask your dealer about the actual power and
reliability of your prospective amplifier or receiver at this impedance.
UNDERSTANDING “MIN/MAX” POWER RATINGS
If you intend to use your speakers for background music, or at moderate
levels in a small room, an amplifier or receiver with less than the recommended
minimum power rating can be used. But it is important to be aware of potential
damage to tweeters that exists when a low-powered amplifier, or receiver is
played at volumes beyond its normal limits.
At some loud “peak” listening levels, all amplifiers will “clip” off the peaks
of the musical signals. When this happens, the resulting harsh distortion may
contain a considerable amount of supersonic energy, which is routed to the
tweeters. This high energy can destroy your tweeters.
All SM series speakers have built in self-resetting circuit breakers for the
midranges and tweeters. If excessive power is applied to the speaker, a circuit
breaker will temporarily interrupt the power. This may be heard as an on and
off cycling of the midrange and/or tweeter. If this happens, the volume level
should be reduced until the on and off cycling stops.
CARE OF YOUR SPEAKER SYSTEM
Your INFINITY speaker cabinets are finished with a heavy-duty, high
quality vinyl which requires very little maintenance. Keep the cabinets clean
by dusting them occasionally with a damp cloth, or use a good quality cream
or spray furniture polish to maintain their original luster. (When using aerosol
products, always spray the cloth, not the speaker, to help prevent any of the
product from drifting onto the drivers.)
The grilles may be cleaned by gentle vacuuming.
FEEDBACK
If, after taking care in positioning your speakers, you find the bass response
is boomy and lacking tightness, or you hear a rumble when playing records,
or you notice excessive movement of the woofer cones, the cause may be
acoustic feedback. This means that the vibrations from your speakers are
reaching the turntable. Because of the exceptionally low frequency response
of INFINITY speakers, isolating the turntable from these vibrations is an
important consideration.
In general, make sure the turntable is placed on a heavy, solid support, as
far away as possible from the speakers. If you continue to experience
difficulties after some experimenting with placement, ask your INFINITY dealer
for assistance.
IN CASE OF TROUBLE IN YOUR STEREO SYSTEM
Note that you can use your stereo's two channels of information for simple
trouble-shooting. If the sound quality is distorted, listen to each speaker
separately to check if the fault is present in both. If it is, then the trouble is likely
to be elsewhere in your system. If the fault is in one channel only, reverse the
outputs of your amplifier to the speakers. If the distortion moves to the other
channel, the fault is not in the speaker.
If you have been unsuccessful in locating the specific sources of trouble,
or if you have located it but cannot correct it, make these inquiries:
A. Consult the INFINITY dealer from whom you purchased the system.
B. Get the name and address of the authorized INFINITY service facility
nearest you by writing or calling INFINITY. You may be instructed to take or
send the problem part to a service facility or the factory, for service under the
terms of the warranty.
NOTE: DO NOT SHIP ANY PARTS OR WHOLE SPEAKERS FOR SER-
VICE WITHOUT PRIOR APPROVAL (“RETURN AUTHORIZATION”), AND
DO NOT SHIP WITHOUT ENCLOSING A COPY OF YOUR ORIGINAL BILL
OF SALE.
If there is no authorized service facility near you...
C. Write or phone the service department (INFINITY Customer Service,
9409 Owensmouth Avenue, Chatsworth, CA 91311; (818) 407-0228) and
describe the difficulty as specifically as possible. The service department will
advise you of what action you should take.
TROUBLE-SHOOTING THE SPEAKER
Before consulting your dealer, INFINITY service facility or factory service
department, there are tests you can do to locate and solve possible problems
in your speakers.
If a tweeter is not working:
Step 1. Remove the tweeter and check to see that the wires are con-
nected. If they have come loose, reconnect them and put the tweeter back in
place. If the connections are good but the tweeter is still not working, go on
to...
Step 2. Interchange the non-working tweeter with the one from the other
cabinet. If the problem follows, the tweeter is defective; call your dealer for
instructions.
If a midrange is not working:
Step 1. Remove the midrange and check to see that the wires are
connected. If they have come loose, reconnect them and put the midrange
back in place. If the connections are good but the midrange is still not working,
go on to...
Step 2. Interchange the non-working midrange with the one from the
other cabinet. If the problem follows, the midrange is defective; call your dealer
for instructions.
If a woofer is not working:
Step 1. Large INFINITY woofers can be quite heavy, so use caution. Lay
the speaker on its back on a soft clean cloth, then remove the woofer and
check to see that the wires are connected. If they have come loose, reconnect
them and put the woofer back in place. If the connections are good but the
woofer is still not working, go on to...
Step 2. Interchange the non-working woofer with the one from the other
cabinet. If the problem follows, the woofer is defective; call your dealer for
instructions.
If the sound from your speaker system still seems to be distorted, but all
of the drivers seem to be operating properly, and you have ascertained that
the problem is not in your stereo system's other components, the problem may
lie in the passive crossover inside the affected speaker. Call your dealer for
advice.
INFINITY constantly strives to update and improve existing products, as
well as create new ones, therefore, the specifications and construction details
in this and related INFINITY publications are subject to change without notice.
RECOMMENDED AMPLIFIER POWER RATINGS, SM SERIES
SM 82 10 - 125 WATTS
SM 102 10 - 150 WATTS
SM 112 10 - 175 WATTS
SM 122 10 - 200 WATTS
SM 152 10 - 300 WATTS

Infinity SM Series Specifications

General

Series	SM Series
Impedance	8 Ohms
Sensitivity	90dB
Woofer Size	6.5 inches
Tweeter Size	1 inch
Weight	15 lbs