AudioControl EQS, Руководство пользователя, Страница: 17 / 25

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Owner’s Enjoyment Manual 14
width. For that reason you will want to keep this area as smooth
and balanced as possible. Too much boosting can make you feel
like your listening to your system in a tile bathroom. Not enough
energy midrange sounds empty and dry.
Treble: 3KHz and Up – If midrange is the cake, then
these high or upper frequencies are considered the frosting.
Many autosound systems start a gradual decline in this area
which is why speaker placement is very important. The EQS
only gives you a few controls in this area because too much
boosting can really make a speaker sound un-natural.
F. PFM Subsonic Filter
Many car audio systems truly push the limits of their
subwoofer...without really knowing it. Tuned enclosures
affect the roll-off of many speakers, yet lots of source mate-
rial forces the speakers to play lower than expected. The net
result is
wasted
amplifier power and
damaged
speakers.
The AudioControl PFM (Programmable Frequency Match or
Pure F#@&% Magic) filter is a programmable subsonic filter.
It allows you to only let the speaker play as low as it should
be playing. Because every system is different, we allow you
to change the PFM roll-off frequency to whatever you
choose.
On most systems, the factory-installed module (33Hz) is
fine. However, if you know the tuning frequency of your
speaker enclosure (porting frequency or 3dB down point),
you might try setting your PFM module to that frequency. If
you want to protect your speaker system even more, you
might even try a higher frequency as it will probably sound
better than you think.
G. Troubleshooting
No Power: If the Power LED on your EQS will not turn
on, check to make sure that the power wire and remote turn
on wires are connected or a fuse has not blown.
Sounds Distorted: Should your system sound dis-
torted or your speakers are moving way too much, you
should make sure you have your levels matched properly and
that your amplifier gains are set at minimum. If this checks
out okay, you
will want to look at your EQ controls
to insure that your boost levels are not too high.
Still Sounds Distorted: Set the PFM filter higher to
match your speakers response.