The frequency attenuation section is comprised of 3 switch able
filters at 2Khz, 4Khz and 8Khz (on all tower speakers except the
SM 100). The most popular switch formation is with the 4K and 8K
switches in the up position. Because there is such a variety in
the room acoustics, the speakers will need to be adjusted accordingly.
This is a theoretical guideline and experimentation will be necessary.
Thermal Overload Protection:
This section is comprised of 3 optional fuse holders. If your speakers
came with the fuse option, it is of utmost importance to use the
proper size fuses in the fuse holders. All fuses should be standard
(not slow blow). Failure to do this will void the warranty! The
fuses should not blow with typical program material (even up to
300 watts) assuming that 80% is absorbed by the woofer.
Low Frequency Attenuation:
WARNING: This speaker is optimized for frequencies above 35 Hz.
Frequencies below this at high volume levels could damage the LF
driver. When playing normal music program, this would not be a concern.
Some of the bass CDs like the automotive "Mega Bass" type
have to be limited to 37 Hz using a 40 Hz HPF (these CDs have sine
waves down to 15 Hz).