amplifiers at various levels to ensure the voltages at the coils are equal. Imbalance in this
area will at best cost you SPL and at worst will damage your equipment.
You'll be referring to our data and speaking to our distributors to choose a box design, but
some general information is that a larger box will tend to give more low bass but at the
expense of some power handling. If you are lucky enough to have a large and powerful
amplifier then you will be able to run the subwoofer harder in a more controlled fashion. A
less powerful amplifier always carries with it the risk of burning out the speaker due to
distortion and the resulting excessive heat soak.
Every subwoofer installation needs a crossover function - the precise settings are a subject
of discussion for each particular setup but a good starting point is to work with a 25Hz
subsonic (low pass) filter and a 100Hz high pass filter. Whilst these will not produce
optimum results in every case they will certainly be enough to get you up and running.
Once the speaker is installed and working it is vitally important to follow a break in
procedure. On smaller woofers with single spiders a short break in period of a few hours at
medium volume, making sure the woofer is not in any way stressed, will result in a
satisfactory looseneing of the components. On the larger or multi spider products or
specialist professional woofers such as RED series and XPL it is absolutely critical that the
speakers are not extended until at least 20 hours of playing at medium volume has been
completed. Failure to do this will almost certainly lead to failure of the motor due to the
suspension presenting excessive resistance in its pre-break in state. Failure of speakers due
