Infinity Comprehensive Guide to Connecting Subwoofers with the BU-2

Figure 3b. You can use this method

CONNECTING YOUR SUBWOOFER (CONT’D)

OUTPUTS (Preamp with one

(2 “Y”connectors) if your preamp has only one set of outputs.

L R

set of outputs)

“Y” Connector

TO SATELLITE

SPEAKER AMPLIFIER

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

LEFT	+	R	–	–	L	+
		HIGH LEVEL INPUT
						LOW LEVEL
						INPUT
	AUTO					L
POWER	POWER
	ON OFF
						R
	+	R	–	–	L	+
		HIGH LEVEL OUTPUT

BU-2

SUBWOOFER

PLATE

RIGHT

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

HIGH LEVEL INPUT

+ R –– L +

AUTO
POWER POWER
ON OFF
LEFT BU-2	+ R –– L +
	HIGH LEVEL OUTPUT
SUBWOOFER
PLATE

LOW LEVEL

INPUT

L

R

To Left
To Right
			HIGH LEVEL INPUT
		+	R	–	– L	+
LEFT
		AUTO
		POWER POWER
		ON OFF
		+	R	–	– L	+
		RIGHT BU-2	HIGH LEVEL OUTPUT
Female-to-Male	RIGHT	SUBWOOFER
“Y” Connector		PLATE

LOW LEVEL

INPUT

L

R

Powered Subwoofer BU-2 – Owner’s Manual ◆ 6