TIPS TO GET THE MOST OUT OF YOUR 4XL WOOFER
Your PowerBass Xtreme subwoofer has been meticulously engineered and designed to handle high power
musical reproduction. Despite their rugged construction, it is possible to damage your speaker if they are
improperly used. In general, you will hear distortion as a so-called warning before any damage occurs. If
you hear distortion in your system, immediately reduce the musical level to the point where the sound retains
its clarity.
1. All PowerBass Xtreme subwoofers require an initial break-in period before it will reach optimum perfor-
mance. Like any new precision machinery, allow a minimum of several days to one week with normal
daily usage to ensure that the suspension has properly been broken-in.
2. Never use only one coil on a dual voice coil subwoofer. Doing so will significantly decrease the efficiency
and power handling of the speaker.
3. Be sure you supply the woofers with enough unclipped amplifier power to drive them properly. (More
damage can be done to a woofer by under-powering and clipping your amplifier than any other way!)
4. Where possible, run your woofers in mono instead of stereo. Most bass is reproduced in mono so there
is less chance of any cancellation if played in mono.
5. Where possible, a separate amplifier just for your subwoofers should be used with an electronic cross-
over to set the frequency range. One Class D amplifier per 4XL woofer is optimum.
6. Do not block the front of your speakers or ports. You want as much direct air coupling as possible. Also
be sure to round off the inside edges of the port to reduce any port noise.
7. For ported enclosures, keep in mind that you must leave at least twice the port diameter size between
the subwoofer and the port itself. Leave at least one time the port diameter between the port and any
walls of the enclosure.
8. Remember the Golden Rule “Measure twice…cut once.”
BREAK IN PERIOD
To get the most from your woofer we recommend a "break-in" period of at
least 40 hours
at no more than
1/3 of maximum volume.
During this time the cone and spider assembly will gradually break in resulting in greater performance and
more listening enjoyment.
