CLS-10 / 12 Subwoofer Controls and Connections
The 100Hz filter mentioned above allows bass management at speaker level. The built-in filter subtracts
bass below 100Hz from your satellite speakers and should be used if your receiver or amplifier lacks
bass management and you don’t want to run the satellites full range. Running very small satellite
speakers at high levels, full range, risks damaging them. Since you now have a subwoofer take the bur-
den of trying to reproduce deep bass off the satellites and let the sub handle it. (generally recommend-
ed).
In such a hookup, connect the speaker wires from your amplifier/receivers’ speaker output connectors
to the CLS-10 / 12 High Level In binding posts, then connect another set of speaker wires from the sub-
woofer’s corresponding channel High Level Out terminals to the input terminals of the appropriate
speaker. Remember to set the subwoofer Crossover control to 100Hz to match the internal variable
low-pass to the fixed high-pass.
Bass Equalization:
This control selects between 0, +3dB and +6dB. Adjust for the best bass perform-
ance in your room keeping in mind that the primary goal should not just be more bass—quantity is not
always quality. Ideally, the transition between sub and main speakers should remain seamless and
inaudible. If you can identify the location and presence of the CLS-10 / 12, your subwoofer volume, the
crossover point, or the EQ is probably set too high (or some combination of the three).
Phase:
This switch adjusts the relative phase between the subwoofer and main speakers. This is set
properly when the subwoofer plays most evenly and fully for any given setting of its level control with a
smooth crossover transition to the satellite speakers. The easiest way to test this is in the prime listening
seat while someone else alters the phase control setting. Use either a test-tone generator (there are free
software tone generators available online that let you use your computer to produce test tones; see
links below), test tones from a test CD/DVD, or music that has bass that runs up and down the scale
from deep bass to mid-bass. In particular, pay attention to the transition from the subwoofer to the
satellites with the Phase switch in both positions.
AC Line Cord:
This supplies power to the CLS-10 / 12’s internal electronics. The CLS-10 / 12 must be
plugged in to the proper power 110/220 receptacle in order to operate properly.
Fuse:
This fuse protects the CLS-10 / 12 from abnormal power conditions. It’s located under a small
cover as part of the AC line cord socket. Use only a T2.5A 250V fuse when operating on 115V. Use only
a T1.5A 250V fuse when operating on 230V. If replacement of the fuse does not solve the problem and
11
