Velodyne VA-1250X - Manual (Page 7)

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Installation
Your new VA-1250X subwoofer system provides for a number of
installation options. Read all the installation information below in
order to determine which installation option is best for your system.
Remember to perform all installation procedures with system
power turned off.
Inputs
Your new subwoofer is equipped with both speaker-level and line-
level inputs. Use the LINE-IN jacks when connecting your sub-
woofer to a pre-amp, signal processor, orsubwoofer output/LFE.
The FROM AMPLIFIER jacks connect directly to the speaker
outputs of a integrated amplifier or receiver. Your amplifier section
will notice no additional loading effects when you use these inputs
because of their high impedance.
Note
Do not use both LINE-IN and FROM AMPLIFIER inputs simulta-
neously.
Volume control
This control allows you to balance the output from the subwoofer to
the main speakers in your system. This control should be set to
achieve similar volume level from both the main speakers and
subwoofer.
Low-pass crossover
Both sets of inputs sum the left and right channels together and the
resulting signal is passed through an adjustable low-pass crossover
before being amplified. The crossover control allows you to adjust
the upper limit of the subwoofer's frequency response from 40 to
120 Hz. The subwoofer's response will begin rolling off above the
frequency you set this control to.
You should set the crossover frequency to obtain a smooth and
seamless transition from the subwoofer to the main speakers in
your system. If your main speakers are smaller units with limited low
frequency output, you may wish to choose a higher frequency (such
as 100-120Hz) than you would with larger speakers which have
greater low frequency output. With larger speakers, you might start
with this control set lower, such as 80Hz.
output and increased noise. In these cases, to optimize your sub-
woofer performance you should bypass the internal crossover in
your Velodyne subwoofer.
To bypass the crossover within the subwoofer, simply locate the
switch marked "normal/bypass" on the back panel of the subwoofer
and set to the "bypass" position. This will eliminate the internal
crossover function.
Note
If not using an external crossover, you should use the built-in
crossover for optimal performance.
Subwoofer out from A/V
Processor
From the low pass output of your signal processor Install into right or
left RCA line in connector in the back of the subwoofer or use a "Y"
connector adapter into both right and left RCA line in connectors in
the back of the subwoofer.
Speaker-level connection
Figure 2 shows an easy way to connect your VA-1250X subwoofer
directly to your receiver or integrated amplifier.
When connected in this fashion, your satellite speakers will be
crossed over at 80/100Hz, which removes the lower bass from your
speakers thus, enabling them to do a better job reproducing high
frequencies.
You may also connect your satellites directly to your receiver or
amplifier along with the subwoofer if you wish to bypass the internal
high-pass crossover.
Caution!
To avoid damage to your main amplifier, be sure to maintain correct
polarity when making all connections. Red (positive) to red, and
black (negative) to black. Be sure that all connections are tight, and
that there are no loose strands or frayed wires.
continued. . .