JBL Professional LSR4328P, LSR4326P owner manual Appendix E SPL Calibration

Page 42

Appendix E: SPL Calibration

Appendix E: SPL Calibration

The chart below shows the SPL (Sound Pressure Level) delivered by the speaker when the listening position is 1 meter (3.3 feet), 2 meters (6.6 feet) and 3 meters (roughly 10 feet).

You can create a visual reference for any listening distance using a readily-available Sound Pressure Level (SPL) meter and a pink-noise source. Here is the procedure for doing so:

1.Place the SPL meter at the mix position and turn it on.

2.Begin playing the pink noise source back through your LSR4300 speakers.

3.Using the +/- buttons, raise the LSR4300 system volume so that the ﬁrst amber- colored LED (-10 dB) begins to ﬂicker and note the amount registered in the SPL meter.

You now know the approximate SPL the speaker is contributing whenever the ﬁrst amber LED begins to illuminate. Alternately, set the system volume to produce the desired SPL at the mix position and make a visual note of the illuminated meter segment that correlates to the desired SPL. Using LSR4300 Control Center Software, you can store and recall a system volume settting that produces your desired SPL.

38

Image 42

Contents LSR4328P, LSR4326P Studio Monitors Page Safety Instructions Explanation of Graphic SymbolsTable Of Contents Introduction Manual ConventionsFeatures RMC Room Mode CorrectionHiQnet 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 AC Power Connections Network Connections and DIP Switch SettingsPage Audio Connections Analog ConnectionsRMC Room Mode Correction Performing An RMC Calibration Reference Performing An RMC Calibration Reference Performing An RMC Calibration Equalization Reference Performing An RMC Calibration/EqualizationReference Equalization Restoring Factory Settings LSR4300 Control Center SoftwareAppendix a EQ Presets Appendix a EQ Presets Appendix B System Block Diagram Appendix C Wiring Requirements Analog ConnectionsUnbalanced Sources Digital Audio Connections Appendix D Mounting Speciﬁcations Fastener speciﬁcationsAppendix E SPL Calibration Appendix F Error Messages Troubleshooting List of Error MessagesTroubleshooting List Speciﬁcations SystemInputs Display What does the JBL Warranty cover? Who Pays for What? Warranty StatementWho Is Protected by This Warranty? How to Obtain Warranty Performance?Limitation of Implied Warranties Mailing Address Customer ServiceJBL Professional Contact Information Shipping AddressPart Number Rev