Using The Controls - AudioSource SW Four Owner's Manual

Using the Controls
Power:
The power control has three positions: On, Off, and Auto. The Auto position is the normal setting.
This keeps the subwoofer amplifier in a standby mode. Using sophisticated signal sensing circuitry, the SW
Four amplifier is instantaneously activated whenever a signal is detected at either of the inputs. If no signal
is detected over a period of minutes, the amplifier switches back to the standby mode. The On and Off
positions override this circuit, setting the SW Four permanently On or permanently Off. The red "Power"
LED indicates when the SW Four is On.
Phase:
The normal setting for the Phase switch is the 0- position. Because the SW Four is not in the same
cabinet or the same location as your other speakers, the sound from the SW Four may arrive at your ears at
a slightly different time than the sound from your other speakers - it may arrive "out of phase". In these rare
cases, there will be a cancelling effect in the upper bass and lower midrange. The bass sounds will appear
somewhat hollow and the level control may seem to have little or no effect. Setting the phase switch to the
180- position will compensate for these effects. Let your ears decide which setting sounds best.
Level:
The SW Four will be playing along with the other speakers in your system. The level control will allow
you to balance the volume of the SW Four to blend in with your system. Once this level control is set, it should
not require further adjustment. The volume of the signal coming into the SW Four will determine the
listening volume. Start with the level control all the way down. Then, with the other speakers playing, slowly
increase the level of the SW Four to the desired level. The sound where you normally listen to your system
may be different than the sound at the SW Four while you are making this adjustment. It might take a few
rounds of stepping back and listening to get the level set correctly.
Crossover Frequency:
The crossover acts as an audio prism, separating sounds of different frequencies from each other. The
crossover frequency control is used to adjust at what point the crossover will separate the low frequencies
being used by the subwoofer from the high frequencies continuing on to the rest of the system. The normal
range for this control will be between 80 Hz to 120 Hz. Raising the crossover frequency will increase the
range of sounds the SW Four will reproduce. Lowering the crossover frequency will limit the range of
frequencies reproduced by the SW Four.