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View online or download PDF (6 MB) QFX PBX-8074 User manual • PBX-8074 PDF manual download and more QFX online manuals. PBX-5 English 1 OPERATING INSTRUCTION PBX-5 PORTABLE SPEAKER. LINE IN JACK 1. Connect an audio cable (not included) to the LINE IN JACK of the speaker and to FUNCTION OPERATION: 1 2 3 4 5 6 9 7 8 10 11 12 USER MANUAL 1:OFF/ON Speaker power off/ speaker power on 2:MIC Plug the wired microphone to use .