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Volume Control
The volume control allows you to balance the output from the subwoofer to the
main speakers in the system. This control should be set to achieve a comfortable
listening level of both the main speakers and the subwoofer, while listening to
music. A good starting point for the volume control is at 3 or 4 dots from the
MIN setting. The correct output level setting of the subwoofer should blend the
subwoofers output smoothly with that of the satellite speakers. It should not be
set to overpower them or be inaudible. Many home theater receivers have a Test
Tone function that will play a noise/test signal of equal level through the speakers
and subwoofer output, one at a time, to aid in balancing volume. Consult your
receiver owners manual to see if this function is offered to aid in setup.
Low-Pass Crossover
The low-pass crossover control allows you to adjust the upper limit of the
subwoofers frequency response from 40 to 120 Hz. Velodyne recommends that
you set the DECO 8 subwoofer to the DECO Setting for optimal x-over point (see
Figure 8 page 14) when you are using the DECO Satellites. This setting will prove
a seamless transition between the subwoofer and satellites. If you use the DECO
8 Subwoofer with another satellite speaker system, you may need to adjust your
crossover to provide the proper integration. Velodyne has also provided a bypass
switch on the amplifier panel, if you wish to utilize the LFE output from your home
theater receiver (see Crossover Switch section on Page 12).
Phase Switch
The phase switch control allows you to reverse the phase of the subwoofers
output signal 180° to correct for a mismatch between the subwoofer and satellite
speakers sound output. This could result from electrical differences in your
equipments internal wiring, external wiring of satellite speakers relative to the
subwoofer, or acoustic differences resulting from room placement (distance between
subwoofer and front satellites). A mismatched system will result in cancellation of
some sound output between the subwoofer and satellite speakers. To adjust the
phase switch, remain seated in the listening position while someone moves the
phase switch from the 0° position to the 180° position. Listen for an audible
change in low-mid frequency output. The correct position will have a greater amount
of apparent low-mid frequency output.
system wiring diagram).
CONNECTING/CONFIGURING THE DECO 8 SUBWOOFER
Velodyne recommends using the line level inputs to connect the DECO 8 subwoofer
to a preamp, signal processor or receiver with a SUBWOOFER OUTPUT for
optimum performance in most home theater systems.
Velodyne has provided a high quality 16 RCA Subwoofer cable to connect the
subwoofer to your receiver, as illustrated in Figure 6 below. The cable should be
inserted into the RCA input labeled LFE IN (Low Frequency Effects) on the amplifier
panel. The other end of the cable should be inserted into the SUBWOOFER OUTPUT
on the back of your receiver (see Figure 7 page 13 for typical use of the single
RCA cable).
Figure 6. Diagram of RCA Cable on DECO 8 amplifier panel
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