JBL Professional LSR4326P, LSR4328P owner manual Unbalanced Sources

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Appendix C: Wiring Requirements

Unbalanced Sources

When using unbalanced sources, there are more possibilities to introduce ground loops into a system. The LSR4328P and LSR4326P offer several ways to help alleviate potential problems with unbalanced equipment.

While there are only HOT and GROUND/SHIELD connections from unbalanced sources, it is recommended that high quality twisted pair cable be used. Diagram B shows an unbalanced source connected to the balanced XLR input of the LSR monitor using twisted pair cable. Note that the shield is connected to the GROUND/SHIELD connector at the LSR input, but not at the source. This reduces the likelihood of introducing a ground loop into the system.

When using unbalanced signals with an LSR4328P or LSR4326P, we recommend using 1/4″ Tip/Ring/Sleeve connections. As shown in Diagram C, when using the 1/4″ Tip/Ring/Sleeve or XLR connection, the GROUND should be tied to the source -- not the sleeve -- of the LSR input for optimum performance.

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Contents LSR4328P, LSR4326P Studio Monitors Page Explanation of Graphic Symbols Safety InstructionsTable Of Contents Manual Conventions IntroductionRMC Room Mode Correction FeaturesHiQnet Networking Onboard Bi-ampliﬁcation Quick Start LSR4300 Rear Panel LSR4300 Front Panel Quick Start Reference OverviewFront Panel Reference Front Panel Reference Front Panel Reference Front Panel Reference Front Panel Analog input selected Reference Front Panel Rear Panel Reference Rear Panel Remote Control Reference Remote Control Speaker Placement Network Connections and DIP Switch Settings AC Power ConnectionsPage Analog Connections Audio ConnectionsRMC Room Mode Correction Performing An RMC Calibration Reference Performing An RMC Calibration Reference Performing An RMC Calibration Reference Performing An RMC Calibration/Equalization EqualizationReference Equalization LSR4300 Control Center Software Restoring Factory SettingsAppendix a EQ Presets Appendix a EQ Presets Appendix B System Block Diagram Analog Connections Appendix C Wiring RequirementsUnbalanced Sources Digital Audio Connections Fastener speciﬁcations Appendix D Mounting SpeciﬁcationsAppendix E SPL Calibration List of Error Messages Appendix F Error Messages TroubleshootingTroubleshooting List System SpeciﬁcationsInputs Display How to Obtain Warranty Performance? Warranty StatementWho Is Protected by This Warranty? What does the JBL Warranty cover? Who Pays for What?Limitation of Implied Warranties Shipping Address Customer ServiceJBL Professional Contact Information Mailing AddressPart Number Rev