Phil Jones Bass M-500, Руководство пользователя, Страница: 9 / 25

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21. OUTPUT LEVEL POWER INDICATOR.
The 3 LED lights (25W-Blue, 250W-Green, 500W-Red) will give an approximate output
power to your speakers. It is calibrated to a 4
Ω load. If the red light stays on continuously
when you are playing, you are probably over-driving your amplifier. Back off on the
master volume control if this occurs. Constantly overdriving the amplifier will cause
excessive heat build up in the amplifier and it will automatically shut down to prevent
further damage.
22. EXTERNAL VOLUME CONTROL SOCKET.
This is a feature whereas you can control the amplifier output by means of the external
PJB foot volume pedal. (Available as an accessory.) This socket is only to be used for the
PJB pedal.
23. HEADPHONE OUTPUT JACK.
This jack accepts ¼ inch stereo headphone jacks. When a headphone is connected to the
jack, the speakers are automatically shut off. The M-500 features a high-performance
headphone amplifier. This output is optimized for standard headphone impedance of 30-
40
Ω but will work on practically any type of headphones.
24. FX SEND OUTPUT JACK.
This jack sends the signal to an effects processing unit. It can also be used to send the
signal to a tuner.
25. FX RETURN INPUT JACK.
This jack accepts the signal from an effects processing unit. Plugging this jack in only
will disrupt the signal path in the M-500.
26. POWER ON/OFF SWITCH.
This switches the main power on and off in the amplifier. When the M-500 is switched
on, there will be a slight delay while the protection circuits give the amplifier a “soft”
start so there is no thumping sound to the loudspeakers.
27. POWER ON/OFF LAMP.
This high power LED will illuminate blue when the power is switched on.
28. AIR INTAKE -FORCED AIR COOLING SYSTEM.
The M-500 is capable of providing more than 700 watts without distortion. This is only
possible by using a ‘forced air’ cooling system. Never block these vents, as this will
greatly impair the performance and reliability of this amplifier.
29. POWER RESET TRIP.
If the speaker outputs are accidentally short-circuited or the speaker impedance load is
too much for the amplifier, this circuit will trip out the power to prevent damage. Push
this button to reset the amplifier.
30. AC POWER INPUT FUSE.
Uses slow blow 1 ¼ inch fuse.