User manual INFINITY REFERENCE 311A 611A 1211A 7521A 7541A 5761A
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[. . . ] reference series
311a , 611a , 1211a , 7521a , 7541a , 5761a
instructions
for purchasing a Reference Series amplifier. In order that we may better serve you should you require warranty service for your new amplifier, please retain your original purchase receipt and read the enclosed warranty information card.
Thank you
INTRODUCTION
WARNING!Playing loud music in an automobile can hinder your ability to hear traffic and permanently damage your hearing. We recommend listening at low or moderate levels while driving your car. [. . . ] Figures 3 and 4 show how to configure the Reference subwoofer amplifiers (models 311a, 611a and 1211a). NOTE: For simplicity, Figures 3 and 4 do not show power, remote and input connections. NOTE: Minimum speaker load is 2 ohms.
Figure 3. Reference subwoofer amplifier with two woofer connections.
Figure 4. Reference subwoofer amplifier with one woofer connection.
APPLICATIONS 7521a
The 7521a amplifier can be set up for stereo or bridged-mono operation, as shown in Figures 5 and 6. NOTE: For simplicity, Figures 5 and 6 do not show power, remote and input connections. NOTE: Minimum speaker impedance for stereo operation is 2 ohms. Minimum speaker impedance for bridged operation is 4 ohms.
Figure 5. 7521a amplifier set up for stereo operation.
Figure 6. 7521a amplifier set up for bridged-mono operation.
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APPLICATIONS 7541a
The 7541a can be set up for stereo 4-channel, 3-channel or bridged 2-channel operation, as shown in Figures 7 through 9. NOTE: For simplicity, Figures 7 through 9 do not show power, remote and input connections. NOTE: Minimum speaker impedance for stereo operation is 2 ohms. Minimum speaker impedance for bridged operation is 4 ohms. NOTE: "Bass Boost" only affects rear channels.
Figure 7. 7541a amplifier in 4-channel (stereo) operation to drive front and rear full-range speakers.
Figure 8. 7541a is set up for 3-channel operation to drive a set of full-range speakers and a subwoofer.
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Figure 9. 7541a used in bridged 2-channel mode to drive a set of components or subwoofers.
APPLICATIONS 5761a
The 5761a can be configured for 6-channel, 5-channel or 3-channel operation, as shown in Figures 10 through 12. INPUT MODE SWITCH: · Use INT (internal mode) to send a signal from the front and rear inputs to the subwoofer. · Use EXT (external mode) when sending a dedicated signal to the subwoofer inputs; e. g. , if your source unit has a subwoofer output. NOTE: For simplicity, Figures 10 through 12 do not show power, remote and input connections. NOTE: Minimum speaker impedance for stereo operation is 2 ohms. Minimum speaker impedance for bridged operation is 4 ohms.
Figure 10. [. . . ] Install the control module in the front of the vehicle within easy reach of the driver. Both the underside of the dash and the center console are suitable locations. Refer to the mounting instructions accompanying the 100rc. SETTING THE BASS BOOST The 7521a, 7541a and 5761a are all equipped with a bass-boost control. [. . . ]
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