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Velodyne SMS-1 Manual

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Digital Drive SMS-1 User’s Manual - 9
INSTALLATION – STEP-BY-STEP
To ensure a quick and awless installation of your Velodyne Digital Drive SMS-1, follow these setup instructions.
SMS-1 Cable Connections
Make all necessary cable connections between the applicable SMS-1 connector port and your particular
home electronics equipment in the following order:
1. Insert the detachable power supply into the power interface port on the rear panel of your SMS-1.
Plug the male end of the cord into a convenient wall outlet.
2. Provide signal to your SMS-1 through one or more of the following connections (refer to your
receiver/processor owner’s manual for available inputs to the SMS-1):
a. LFE INPUT (RCA, the RED jack at location 17 on Figure 1) – This is the most common input
cable connection. Make a connection between this input and the LFE output of your receiver
or processor; OR
b. LFE INPUT (XLR, location 7 on Figure 1) – Make a connection between this input and the
balanced LFE outputs of your receiver or processor; OR
c. INPUT, LEFT and RIGHT (location 17 on Figure 2)– Make a connection between these inputs
and the stereo outputs of your receiver or processor; OR
d. SPEAKER-LEVEL INPUT (location 18 on Figure 2) - Make a connection between these inputs
and the left and right speaker connections on your receiver or processor. Make this connection
by inserting speaker wire into the correct terminals of the terminal block.
3. Establish the return line-level connection (optional). Connect to a pre-amplier’s main outputs and
return them to your amplier inputs. When installed in this fashion, your satellite speakers will be
crossed over at 80Hz, which removes the lower bass from your amplier and speakers, enabling
them to do a better job reproducing high frequencies. By utilizing this method, you will have a bi-
amplied system, gaining improved power and headroom for your system.
NOTE: To bypass the 80Hz crossover described in step 3, use the THRU output jacks instead of the OUTPUT
jacks.
A word about SMS-1 outputs
The Velodyne SMS-1 is designed to operate using the full range audio signal for input when using the digital
built-in crossover. Most processors/receivers have a “subwoofer out” or LFE jack that is internally ltered and
designed to be used with a conventional amplier and speaker. In some rare cases, combining both an external
crossover and the one internal to the SMS-1 may result in low output and increased noise. In these installations
you may need to bypass the internal crossover in either the processor or Velodyne SMS-1. In some installations,
simply setting one crossover to a higher frequency (such as 120Hz) will restore maximum performance. To
bypass the SMS-1’s internal crossover when the unit is being fed a low pass signal from another crossover, refer
to the SETUP instructions at step 14, below.
Note: If not using an external crossover, you should use the built-in crossover for optimal performance.
… 15 …


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