Velodyne Acoustics DLS-3500R User Manual

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(5) LINE INPUT/LFE Input

Connect these jacks to the LINE OUT preamp output, LFE
output, or subwoofer output jacks of your receiver/processor. If
using the LFE output from your receiver or processor, plug the
single cable into the “L” – LFE input or, for more signal, use a
“Y” connector and feed the signal into both “R” and “L” inputs.

(6) HIGH PASS CROSSOVER Switch

This switch selects the frequency for the high pass crossover.
This crossover is functional on both line and speaker-level
outputs. Smaller speakers with limited low frequency output may
perform better using the higher 100 Hz setting that will reduce
the low frequencies sent to them. Larger speakers with greater
low frequency output may be able to handle the 80 Hz setting
without strain.

(7) SPEAKER LEVEL INPUT Terminals

Connect these input terminals to the speaker output terminals of
your ampliﬁer or receiver. If you use this method of connection,
when you go to the receiver speaker set up menu, make sure
you select the large speaker option

(8) SPEAKER LEVEL OUTPUT Terminals

Sends a crossed-over speaker-level signal to the front speakers.
See below for a more detailed explanation of this crossover.

Rear Panel Connections – Detailed Explanation

Your new subwoofer is equipped with both speaker-level and line-level
inputs. Use the RCA/Phono type “INPUT” jacks when connecting
your subwoofer to a pre-amp, signal processor, or line-level crossover.
The “SPEAKER LEVEL INPUT” jacks connect directly to the speaker
outputs of an 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 the RCA/Phono “INPUT” connections and “SPEAKER
LEVEL INPUT” connections simultaneously.

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 100-120 Hz) 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 80 Hz.

Subwoofer Direct

Subwoofer Direct is a setting on the low-pass crossover knob and
will allow frequencies up to 200 Hz into the subwoofer. See below
for a more detailed explanation of this feature.

Speaker Level Output/Line Level Output

When connected in this fashion, your satellite speakers will be
crossed over at 80 Hz. This removes the lower bass from your
satellites, enabling them to do a better job reproducing high
frequencies and giving your receiver’s amp more headroom (up to
50% more power).

You may also connect your satellites directly to your receiver
or ampliﬁer along with the subwoofer if you wish to bypass this
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.

Power Switch

The master power switch is located on the lower right half of the unit.
This rocker style switch is the main on/off for the unit. This switch
should be set to position 1 for on (up), 0 for off (down).