Hughes & Kettner DFX - Manual (Page 10)

Edition Blue™ 15/30/60 DFX
Before you switch on the audio playback device, turn the Master
control all the way down. Then turn up the Master control a little and
dial in the desired balance levels. Once you‘re satisfied with these
levels, gradually turn up the control to the desired overall level.
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Standard Setup and Cable Connections
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Service and Maintenance
The Edition Blue™ DFX amps do not require maintenance of any
type. However, there are a few precautions to observe to significantly
lengthen the life of your amp:
• Always ensure that all peripheral devices, cords and cables are in
a state of good repair! Defective speaker cables (short circuits, loose
connections) are the most common cause of failure. Poor-quality
cables will always lead to humming problems.
• Make sure that your amp‘s ventilation ducts are not blocked
or covered.
• Avoid mechanical shocks and exposure to extreme heat, dust and
especially moisture.
• Pay close attention to the specifications of peripheral devices.
• Never connect devices with high Output signal levels (e.g. power
amps) to your amp‘s Input.
• Check for the correct voltage before you plug in the amp. If in
doubt, check with the venue‘s sound technician or the caretaker of
the building.
• Do not carry out “do it yourself” repairs. Get a qualified service
technician to replace internal fuses.
• Use a soft, damp cloth to clean the exterior surface of the
Edition Blue™ DFX.
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Troubleshooting
The Edition Blue™ DFX will not switch on:
• The amp is not receiving any Mains voltage. Check the Mains cable
to see if it is properly connected.
• The Mains fuse is defective. Replace the fuse with another suitable
fuse. If this fuse is also defective, consult your Hughes & Kettner®
dealer.
The Edition Blue™ DFX is correctly connected but the sound
is inaudible:
• One or more of the Gain and Master controls may be turned down.
• One of the internal fuses is defective. Get a qualified service
technician to replace the fuse (taking care that the values are the same)
The Clean channel cannot be activated through an external
Footswitch:
• The Channel Select switch on the front panel may not be in the „off“
position. Switch the Clean channel on.
When using the Line In / Line Out jacks, there is a humming
noise:
• An electrical or magnetic field is causing interference. Here, it is
recommended to use a DI box, e.g. Hughes & Kettner® Red Box®.
You have connected an FX processor to the Line Out jack but
the signal is totally distorted even when using Clean sounds.
• The Input of the FX processor is overloaded. Reduce the processor‘s
Input sensitivity (“Input” or “Gain”).
You have connected an FX processor to the Line Out but the
Output signal is too quiet:
• The FX processor‘s Output Level is set incorrectly. Turn the Output
Level of the processor up high.
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