Mackie HRS120 POLARITY, LEFT AND RIGHT INPUTS, LEFT AND RIGHT OUTPUTS, CROSSOVER, XLR, RCA, THX = 0˚, THX = 80Hz

POLARITY

0°

180° POLARITY

THX = 0˚

This switch reverses the polarity of the signal going to the subwoofer amplifier by 180º. It has no effect on the signal at the LEFT and RIGHT OUT or the MASTER OUT.

There is no right or wrong setting for this switch. Listen to the overall blend of the subwoofer with the rest of the system, and select the switch position that gives you the best sound.

LEFT AND RIGHT INPUTS

Balanced XLR female and unbalanced RCA female connectors are provided for the left and right inputs. Connect the full-range line-level signal from the mixer or preamplifier to one of these input jacks.

The connectors are wired as follows (per the AES/IEC standard):

	XLR	RCA
Hot (+)	Pin 2	Tip
Cold (–)	Pin 3	—
Shield (Ground)	Pin 1	Shield

If connecting a single subwoofer or LFE output to the HRS120, use the LEFT (MONO) input with the FILTER BYPASS switch pushed in.

LEFT AND RIGHT OUTPUTS

Balanced XLR male and unbalanced RCA female connectors are provided for the line-level left and right high-pass outputs. Connect these to the inputs of the main speakers (if they are powered speakers) or to the inputs of the amplifier powering the main speakers.

The signal at the left and right outputs is post-crossover. The low-pass output from the crossover goes to the internal power amplifier in the HRS120, while the high-pass output goes to these output jacks.

CROSSOVER

SUB SAT

80Hz

55Hz 110Hz

CROSSOVER

THX = 80Hz

This adjusts the crossover frequency for the built-in 24 dB/octave Linkwitz-Riley variable crossover. The crossover frequency can be adjusted from 55Hz to 110Hz.

INPUT/OUTPUT

POWER		SUB BYPASSED
SUBSONIC FILTER		FLAT	THX PM3 SETTINGS
		15Hz
			SUBSONIC FILTER
	FILTER BYPASS	FILTER IN
		FULL RANGE	FILTER BYPASS
		VARIABLE	FILTER SELECT	(N/A)
	FILTER SELECT
		110Hz ELLIPTICAL	LFE GAIN
	LFE GAIN	0dB	INPUT SENSITIVITY
		+10dB
				POLARITY
			NORMAL
INPUT SENSITIVITY			SUB SAT
		0°	80Hz
			CROSSOVER CONTROLS
		180° POLARITY
	OFF NORMAL
		LEFT
	IN	(MONO)
SUB		OUT
	SAT
80Hz
55Hz	110Hz
CROSSOVER
	L	L
	IN	OUT
	R	R
SUB	SAT
80Hz
55Hz	110Hz
CROSSOVER		OUT
	IN
		RIGHT
	SLAVE/MASTER
SLAVE		MASTER
	IN	OUT
	S	M
POLARITY &
INPUT SENSITIVITY ACTIVE		PROCESSED SIGNAL
	SUBWOOFER BYPASS
	FOOT SWITCH	REMOTE INDICATOR
OPEN - SUB ON, L/R BASS MANAGED		*MAX OPEN CIRCUIT 24V
CLOSED - SUB DEFEAT, L/R FULL RANGE		*MAX CLOSED CIRCUIT 1A

REMOTE INDICATOR CIRCUIT CLOSED WHEN SUB BYPASSED

*TO INSURE PRODUCT SAFETY, POWER SUPPLIES MEETING CLASS-2 INSULATION

REQUIREMENTS SHOULD ONLY BE USED WITH THIS CONNECTOR

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