User manual PYRAMID PB440X

[. . . ] power LED this indicator is illuminated when power is applied. treble control use the control to adjust the treble output level to suit your taste or audio program material. bass control use the control to adjust the bass output level to suit your taste or audio program material. [. . . ] Be sure to select a location inside your vehicle which has adequate ventilation. · Before making or breaking power connections in your system, disconnect the vehicle battery. Confirm that your head unit or other equipment is turned off while connecting the input jacks and speaker terminals. · If you need to replace the power fuse, only replace it with a fuse identical to that supplied with the system. Using a fuse of a different type or rating may result in damage to your system which isn't covered by the manufacturer's warranty. screw spring washer flat washer 2 ch amp PB440X · 4 ch amp PB442X solid mounting surface 12 owner's manual 2 ch amp PB440X · 4 ch amp PB442X troubleshooting Before removing your amplifier, refer to the list below and follow the suggested procedures. Always test the speakers and their wires first. · Check for good ground connection. · Check that remote DC terminal has at least +3v DC. · Check that there is battery power on the + terminal. · Check that Protection LED is not lit. If it is lit, shut off amplifier briefly and then repower it. High hiss or engine noise (alternator whine) in speakers. · Disconnect all RCA inputs to the amplifier(s) ­ if hiss/noise disappears, then plug in the component driving the amplifier and unplug its inputs. If hiss/noise disappears, go on until the faulty/noisy component is found. [. . . ] This warranty will be considered void if the unit has been tampered with, improperly serviced, subjected to abuse or misuse or if installed in a commercial vehicle. This warranty does not cover accidental damage. When returning this unit for service, please include $10. 00 for return postage and handling. [. . . ]