Infinity BU-150, BU-80, BU-120 owner manual Connecting Your Subwoofer

Figure 3b. You can use this method (2 “Y”connectors) if your preamp

CONNECTING YOUR SUBWOOFER (CONT.)

OUTPUTS (Preamp with one

has only one set of outputs.

L R

set of outputs)

“Y” Connector

TO SATELLITE

SPEAKER AMPLIFIER

LEFT	+ L – – R +	Low-Level In
	SPKR
	In	L
	SPKR	R
	Out

SUBWOOFER

RIGHT

PLATE

Figure 4. Method when using single subwoofer or two subwoofers.

When using a single subwoofer, you MUST use a pair of stereo low-level leads from your preamplifier’s outputs. When using two subwoofers, one for the left and another for the right channel, connect the left preamplifier output to BOTH the left and right LOW-LEVEL INPUTS of the subwoofer used for the left channel by using a Female-to-Male “Y” connector at the subwoofer’s input and the right channel preamplifier output to both jacks of the right channel subwoofer in the same manner (see Figure 4). If the preamplifier has a mono subwoofer output, you’ll also need a Male-to-Female “Y” connector to split the mono signal to the subwoofer pair (see Figure 4).

(Preamp with mono SUB OUT

OUTPUTS (Preamp with one

subwoofer output)

OR

L R

set of outputs)

Male-to-Female “Y” Connector

+ L – – R +

SPKR

In

SPKR

Out

LEFT

SUBWOOFER

PLATE

Low-Level In

L

R

To Left
To Right
LEFT
Female-to-Male	RIGHT
“Y” Connector

+ L – – R +

Low-Level In

SPKR

In

L

SPKR	R
Out
RIGHT
SUBWOOFER
PLATE

BU Series Powered Subwoofers – Owner’s Manual ◆ 9