1TechnicalNotesVolume1Number29JBLPrecisionDirectivityPD700SeriesCo-AxialMidHighSpeakerSystemsBackground:Inverylargefixedinstallationssuchassportsarena
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1、1 Technical Notes Volume 1, Number 29 JBL Precision Directivity PD700 Series Co-Axial Mid/High Speaker Systems Background: In very large fixed installations, such as sports arenas, large houses of wor。
