PSB Speakers 6919217 - Manual (Page 21)

Recommended Power
We recommend amplifiers and receivers rated from a range of 50-300
watts. For playing at consistently room-filling volume, a minimum of 100
watts is usually a good idea. Be wary of driving low-powered amplifiers to
their limits as under-powering can cause permanent speaker damage.
Protecting Your Investment
A. For full, year-after-year enjoyment from your speakers, you should
respect their limits. Excessive volume levels can damage even the
most “bullet-proof” speakers, especially over extended time
periods.
B. When listening to music or movies at very loud volume, you
shouldn’t turn up bass or treble all the way or close thereto. This
sends tremendously increased, disproportionate power into the
speakers, and may well damage them. Some loudness
compensation (“Loudness”) controls, which boost both bass and
treble, can also be troublesome at high volume. They are
intended only for low-volume listening.
C. Finally, you should be aware that when amplifiers and receivers
are pushed to their limits to produce excessive volume levels, they
are driven into “clipping” and can do severe damage—especially
to tweeters. Often, the damage is done by underpowered
amplifiers, which may reach their limits very soon. When such
units begin to “clip” the audio waveform, they may generate high-
frequency “spikes” of tremendous power. More tweeters have
probably been destroyed by this phenomenon than any other. If
using your speakers at loud levels, listen carefully for any sign of
harsh, garbled midrange and diminishing intelligibility—and turn
the volume down right away if you detect it.
NEVER TURN UP THE VOLUME ALL THE WAY TO SEE HOW
LOUD YOUR SYSTEM WILL PLAY!
Cabinet Care
Cabinets have varying materials and finishes, including wood veneers
and painted cast anodized aluminum parts. They should be treated as
you would any fine furniture with similar finishes. Dust lightly with a soft
cloth; avoiding abrasives. If necessary, wipe carefully with a cloth slightly
dampened with glass cleaner to remove heavy soil.
Grilles and Ports
A lint brush does a good job of cleaning grilles. Grilles can be taken off
and vacuumed if you prefer. If need be, you can use a lint brush to clean
ports. Avoid touching speaker diaphragms. Particularly, pushing in the
aluminum dome of the tweeter will cause permanent damage.
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