JL Audio 500/1v2 owner manual Appendix D Master/Slave Configurations, Slave a, Master/Slave chain

Appendix D:

Master/Slave Configurations

With the flexible on-board crossovers and processing incorporated into the 500/1v2, it is possible to connect multiple 500/1v2’s in a “Master/Slave” configuration, with each amplifier driving its own speaker system but controlled by the processing and filtering of only one amplifier. This is very useful when driving multiple subwoofers with multiple amplifiers.

To create a Master/Slave configuration, first determine which amplifier will be the “Master” amplifier and connect the main input signal to that amplifier (from the source unit or from an outboard processor). This amplifier’s “Amp LP

Filter” section and “Advanced Bass Control” features will process the signal for the “Slave” amplifier or amplifiers.

Master:

Here is the procedure for implementing a “Master/Slave” configuration:

1)Set the “Master” amplifier’s “Output Mode” switch to the center “Amp Filter” position.

This will send a parallel, mono-summed signal from the “Master” amplifier’s “Amp LP Filter” section to its preamp outputs.

2)Connect an RCA cable from the “Master” amplifier’s preamp outputs to the main input of the first “Slave” amplifier. Set the “Slave” amplifier’s “Amp LP Filter” to the “Off” position. This will defeat the LP filter and the bass processing of this “Slave” amplifier.

3)The input sensitivity of the two amplifiers needs to be adjusted independently. To properly calibrate the amplifiers for maximum, identical, clean output, please refer to Appendix A (page 14). After using this procedure, you can then adjust the level of the amplifiers by adjusting the input sensitivities downward, if the amplifiers require attenuation to achieve the desired system balance. If the input sensitivities are adjusted, the amplifiers must be recalibrated to ensure identical power output levels.

Note: The “Input Range” switch on all “Slave” amplifiers needs to be set to “Low”, even if the “Master” amplifier is high voltage and its switch is set to “High”. All signals passed out of the preamp outputs of the amplifier are compatible with the “Low” setting on the “Input Range” control.

The “Signal Sensing” turn-on feature will not work on “Slave” amplifiers, but “Slave” amplifiers can be turned on and off by a “Master” amplifier operating in signal sensing turn-on mode.

Simply connect the “Master” amplifier’s

“Remote” connection, to the “Slave” amplifier(s) “Remote” connection(s).

Do not increase the “Input Sens.” setting for any amplifier in the system beyond the maximum level established during the procedure outlined in Appendix A (page 14). Doing so will result in audible distortion and possible speaker damage.

4)If you would like to run a third amplifier in

“Slave” configuration, select the “Full-Range” position on the “Output Mode” switch of the first “Slave” amplifier. Then, connect an RCA cable from the first “Slave” amplifier’s preamp outputs to the second “Slave” amplifier. As you did with the first “Slave” amplifier, set the second “Slave” amplifier’s “Amp LP Filter” to the “Off” position. Then, calibrate the third amplifier’s “Input Range” and “Input Sens.” controls in the same manner as you did for the second amplifier.

The Master amplifier’s “Advanced Bass Control” section is active and affects all three amplifiers equally.

This Slave amplifier’s “Advanced Bass Control” section and AMP LP Filter are inactive, but the Full-Range (pass- through) feature of its “Preamp Output” feeds the input of the next Slave amplifier.

+12VDC Ground Remote

Preamp Output Section

Infrasonic Filter

“Q”

Center Freq.

Boost (dB)

Amp LP Filter

Amplifier Input Section

Subwoofer Output

Output Mode

Filter Slope

Mode

1.6

40

+10

Mode Slope

Input Voltage

Input Sens. Signal Sensing

1.1

2.7

30

60

+4

+13

0.7

25

75

Full Range Amp Filter Out Filter

12dB 24dB

Off On

0.5

4.3

20

80

0

+15

Off 12dB 24dB

Low High

Off On

		65	Filter Mode		30	Bass EQ			65
	55	80		22	45		Advanced	55	80
500/1v2
	45	100		18	55		Bass	45	100
Monoblock Subwoofer Amplifier	40	200	LP HP	15	60	Off On	Control	40	MONO OUTPUT ONLY
									200

Left Output Right Output Filter Freq. (Hz) Infrasonic Freq. (Hz) Remote Bass Port Filter Freq. (Hz) Left Ch. Right Ch.

Connect Master 500/1 Input to Signal Source

Connect Master 500/1 Preamp Output to Slave A 500/1 Input

Slave (A):

+12VDC Ground Remote	Preamp Output Section		Infrasonic Filter	“Q”	Center Freq.		Boost (dB)		Amp LP Filter	Amplifier Input Section	Subwoofer Output
	Output Mode	Filter Slope	Mode	1.6		40		+10	Mode Slope	Input Voltage Input Sens. Signal Sensing
				1.1	2.7 30	60	+4	+13

			0.7		25	75
Full Range Amp Filter Out Filter	12dB 24dB	Off On	0.5	4.3	20	80	0	+15 Off 12dB 24dB	Low High	Off On

		65	Filter Mode		30	Bass EQ			65
	55	80		22	45		Advanced	55	80
500/1v2
	45	100		18	55		Bass	45	100
Monoblock Subwoofer Amplifier	40	200	LP HP	15	60	Off On	Control	40	MONO OUTPUT ONLY
									200

Left Output Right Output Filter Freq. (Hz) Infrasonic Freq. (Hz) Remote Bass Port Filter Freq. (Hz) Left Ch. Right Ch.

Additional amplifiers may be added to this

“Master/Slave” configuration following the same

procedure as in step 4.

Once you match the input sensitivities of

all the amplifiers, you can use the “Master” amplifier’s “Amp LP Filter” and “Advanced Bass Control” features to control the “Slave” amplifier(s). If the remote bass control (RBC-1) is used, it need only be connected to the “Master”

amplifier to control all the amplifiers in the

“Master/Slave” chain.

Reference the diagram showing a “Master/ Slave” configuration with one “Master” (top amplifier) and two “Slave” amplifiers. Switches and controls that are defeated in the “Slave”

The last Slave amplifier’s “Advanced Bass Control” section, AMP LP Filter and “Preamp Output”

are inactive.

Connect Slave A 500/1 Preamp Output to Slave B 500/1 Input

Slave (B):
+12VDC	Ground	Remote	Preamp Output Section				Infrasonic Filter		“Q”		Center Freq.		Boost (dB)		Amp LP Filter		Amplifier Input Section			Subwoofer Output
			Output Mode	Filter Slope				Mode	1.6			40	+10		Mode Slope		Input Voltage	Input Sens.	Signal Sensing
									1.1	2.7	30	60	+4	+13
									0.7		25	75
			Full Range Amp Filter Out Filter	12dB 24dB				Off On	0.5	4.3	20	80	0	+15	Off 12dB 24dB		Low High		Off On
					65	Filter Mode		30	Bass EQ							65
				55	80		22	45					Advanced		55	80
	500/1v2
				45	100		18	55					Bass		45	100				MONO OUTPUT ONLY
Monoblock Subwoofer Amplifier				40	200	LP HP	15	60	Off On				Control		40	200

Left Output Right Output Filter Freq. (Hz) Infrasonic Freq. (Hz) Remote Bass Port Filter Freq. (Hz) Left Ch. Right Ch.

amplifiers are printed in gray.

18 JL Audio - 500/1v2 Owner’s Manual 19