Anthony Gallo MPS-150 Subwoofer - Manual (Page 6)

Final Adjustments
Once your MPS-150 has been properly connected and positioned, performance can be further optimized by
adjusting the controls on the Electronic Module. For this purpose, it is helpful to use a recording of a deep male
voice.
Start by adjusting the LEVEL control. Increase subwoofer volume, or level, by rotating the control clockwise, until
the bass output is noticeably louder than the rest of the frequency range. Now, lower bass output by turning the
LEVEL control counterclockwise, until bass seems balanced with the rest of the audio frequencies, and sounds no
longer seem to emanate directly from the subwoofer. You will need to return to the listening position during
adjustments.
Next, crossover frequency must be precisely set. The CROSSOVER FREQUENCY control on your Electronics
Module determines the uppermost frequencies which will be reproduced by your MPS-150. Raise and lower the
crossover point by rotating the CROSSOVER FREQUENCY control clockwise and counter clockwise, respectively.
Too high a crossover frequency will cause male vocals to sound boomy and "chesty". Too low a point will render
the same vocals thin. Find a point at which voices sound natural. WITH NUCLEUS MICRO SATELLITES,
CROSSOVER FREQUENCY OF 120 HZ SHOULD BE IDEAL.
Note: Bass is non-directional; that is, low bass frequencies contain no left-or right-channel stereophonic
information. Therefore, it should be impossible to locate a properly set up subwoofer as a discrete source of
sound. However, when using a high crossover frequency (above approximately 100 Hz), your MPS-150 may
occasionally reproduce information with directional content. If this ever becomes highly noticeable, proper
integration between subwoofer and speakers can be restored by positioning the sub closer to the stereo speakers.
Finally, consider the PHASE switch. Experiment with both the 0-degree and 1 80-degree switch positions. The
correct setting is the one, which provides deeper bass and/or the most "seamless" integration between subwoofer
and speakers. After the proper phase has been determined, you can give the system a final "fine-tuning" by
readjusting LEVEL and CROSSOVER FREQUENCY controls if necessary.
Following these simple instructions and experimenting with placement and controls will enable you to enjoy the
best possible performance your MPS-150 is capable of providing. Thank you for taking the time to read the
manual, now lets get started!
Power Cord
Jumper to Sub
High Level In High Level Out
C o n t r o l s D i a g r a m
Sub Layout 4/10/02 9:15 AM Page 6