Mackie HRS120 HRS120 Block Diagram, TECHNICAL INFORMATION

TECHNICAL INFORMATION

HRS120 Block Diagram

LEFT/MONO	LINEOUTPUT	RIGHT	LINEOUTPUT	SUBWOOFER
2 1	3	2 1	3
			+70V +60V				–60V –70V	SENSE RESISTOR
			POWER	AMPLIFIER			OUT IN	ACE-BASSEQ
			INPUT	SENSITIVITY	(CW=THX)	COMPRESSOR	POWERSUPPLYTRACKING/ PEAKPOWERLIMITER FASTATTACK/SLOWRELEASE
				POLARITY	0º(THX)	180º

MASTER	OUTPUT
1
2	3

SUBWOOFER BYPASS REMOTE INDICATOR

CLOSEDWHENSUBWOOFERISMUTED MAXIMUMVOLTAGEALLOWEDACROSS OPENCONTACTS=24V MAXIMUMCURRENTALLOWEDTHROUGH CLOSEDSWITCH=1A THEPOTENTIALONTHESETERMINALSMUSTBE FLOATINGORREFERENCEDTOSAFETYGROUND

FUSE

A

FREQ

CROSSOVER

BOUT CTL

55Hz-110Hz

24 dB/OCT LINKWITZ-RILEY

CENTER POSITION (80Hz) FOR THX

OUT	OUT
A B CTL	A B CTL

			LFE	GAIN		dB(THX)	+10dB
						0
			SUBSONIC				Av = 10 dB
					FILTER	FLAT(THX)	15Hz
			15Hz		18dB/OCT	BUTTERWORTH LPF
FILTER	BYPASS	FILTERIN		FULLRANGE (THX)
FILTER	SELECT	55Hz-110Hz	110Hz	ELLIPTICAL
							110Hz 42dB/OCTELLIPTICAL	LPF (FOR AC-3/DTS)

FREQ

CROSSOVER

+5V

POWER
SIGNALDETECTOR	IN OUT
INPUT

BYPASSED

SUB

WHENSIGNALISPRESENTTHEOUTPUTISACTIVE.	OUTPUTREMAINSACTIVEFORSEVERALMINUTESAFTER SIGNALISREMOVED.	OUTPUTISINACTIVEWHENNOSIGNALISPRESENTAND BECOMESACTIVEAFTERSIGNALRETURNS.	OUTPUTS		ANDRIGHTOUTPUTS
			HPFFROMCROSSOVERATLEFTANDRIGHT	SUBWOOFERACTIVE REMOTEINDICATORSWITCHOPEN	FULL-RANGESIGNALFROMINPUTSATLEFT	SUBWOOFERMUTED REMOTEINDICATORSWITCHCLOSED

2	3
1
LEFT/MONO	LINEINPUT

2	3	2	3
1		1
RIGHT	LINEINPUT	SLAVE	INPUT

NOTE:WHENUSEDASASLAVE, THEMASTEROUTPUTOFTHEFIRST SUBDRIVESTHISINPUT. "POLARITY"AND"INPUTSENSITIVITY" ONLYAREACTIVEONTHISINPUT.

OPEN= CLOSED=

SUBWOOFER BYPASS FOOTSWITCH

MACKIE DESIGNS HRS120 THX BLOCK DIAGRAM (#110501DF)

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