Velodyne Acoustics Audio/Video Subwoofer System Line-Levelconnection - Option B, Pre-Amp

Note: If not using an external crossover, you should use the built- in crossover for optimal performance. When using a single channel input (such as a surround sound processor’s subwoofer out or LFE), the auto on/off circuit sensitivity will be affected. When one input channel is used instead of two, the unit will see lower signal levels present at the inputs. This may cause the unit to turn off when listening at low volume levels. If this occurs, simply use a “Y” adapter (available from most dealers) to allow your processor’s single sub line to be fed into both L&R inputs. This will make the unit turn on at lower signal levels.

P

LINE-LEVEL CONNECTION - OPTION B

Figure 2 shows connection from a pre-amplifier’s main outputs to the left and right inputs of your Velodyne subwoofer. You will also need to connect a second pair of RCA cables from the outputs on the back of your subwoofer to the inputs on the back of your amplifier. When the subwoofer is installed in this fashion, your satellite speakers will be crossed over at 80 Hz which removes the lower bass frequencies from your external amplifier and speakers, enabling them to do a better job reproducing the higher frequencies. By utilizing this method, you will have a bi-amplified system, gaining improved power and headroom for your system. This installation method is not as common as the method described in Figure 1. (Cables needed: 2 stereo pair of RCA cables.)

TM

SUBWOOFER

VOLUME

MIN		MAX
POWER ON		AUTO
	80 Hz

	LOW-PASS
	CROSSOVER
		120 Hz		40 Hz
POWER		INTERNAL		SUBWOOFER
		X-OVER		DIRECT
ON		PHASE	0 0	180 0
I		R		L
		OUTPUT
O
		INPUT
				LFE
	SPEAKER LEVEL INPUT
+ R	-	-	L	+
117V~
60Hz
8A
WARNING: TO REDUCE THE RISK OF FIRE
OR ELECTRIC SHOCK. DO NOT EXPOSE
THIS APPLIANCE TO RAIN OR MOISTURE.
CAUTION		SERIAL # LABEL
RISK OF ELECTRIC SHOCK
DO NOT OPEN
AVIS: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR		VELODYNE ACOUSTICS, INC.

PRE-AMP

MAIN OUTPUTS

RIGHT LEFT

AMPLIFIER
MAIN INPUTS	MAIN OUTPUTS
RIGHT LEFT	RIGHT LEFT

TO SATELLITE SPEAKERS

Figure 2. Installation Using Stereo Line-Level Inputs

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