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Ensure the amp's voltage rating matches your local AC voltage rating before you plug the cord into the wall socket. ENGLISH ATTAX-MANUAL 3.0 STANDARD SETUP/ CABLE CONNECTIONS 4.0 OPERATING THE ATTAX 50 4.1 SELECTING CHANNELS Use the CHANNEL SELECT switch or an external footswitch to change channels. NOTE: Before using a footswitch, set the CHANNEL SELECT switch on front panel of the amp itself to the CLEAN position. 4.2 THE ATTAX 50 AND SIGNAL PROCESSORS The effects loop on the ATTAX 50 is a serial effects loop, meaning that the entire preamp signal is routed to the FX device and processed there. To connect a signal processor: - Connect the processor‘s INPUT to the ATTAX LINE OUT jack and the processor‘s OUTPUT to the ATTAX LINE IN jack. - To avoid noise, signal degradation, and interrupted signals, only use high-quality patch cables. -Make sure the processor is not distorting the signal. Check the processor's gain LEDs (if it is equipped with this type of display) and use the input and output controls to dial in a suitable level. -Distortion devices are not designed for use in an FX loop. As a rule of thumb, any kind of device that compresses the signal should be connected first in the signal chain. Depending on the type of effect you want to achieve, you may want to connect your compressor directly between the instrument and the amp's input. -If you are using several processors or stomp boxes, ensure you connect them in the proper order. 4.3 THE ATTAX 50 AND MIXING CONSOLES If you want to feed the ATTAX 50's signal to a mixing console, we recommend you route it through a Hughes & Kettner RED BOX. Patch the signal from the LINE OUT jack, as this signal path's level is not influenced by the MASTER setting. The RED BOX balances the signal and simulates a speaker cabinet. 5.0 SERVICE AND PREVENTIVE MAINTENANCE The ATTAX 50 does not require service of any type. However, there are a few precautions you should heed to ensure your amp lasts for many years. -Ensure all peripheral devices, cords and cables are in a state of good repair. Defective speaker cables are the most common cause of power amp failure. Poor-quality cables will cause hum and undesirable noise. -Make certain your amp's ventilation ducts are not blocked or covered. Proper cooling will prolong the life of your amp. -Avoid mechanical shocks and exposure to extreme heat, dust and especially moisture. -When connecting peripheral devices, always pay close attention to their specifications. Never connect devices with high output signal levels (e.g. power amps) to your amp's input. - Ensure you have the correct AC power rating available before you plug in the amp. If in doubt, ask the venue's sound technician or the custodian of the building you are rehearsing in. -Refrain from do-it-yourself repairs! Have a qualified service technician replace internal fuses. With the unit off and unplugged, use a soft damp cloth to clean the exterior surface of the ATTAX 50. ATTAX-MANUAL 6.0 TROUBLESHOOTING 1) The ATTAX will not switch on: - The amp is not getting any AC power. Check the mains cable to see if it is connected properly. -The mains fuse is defective. Replace the fuse with another identical fuse. If this fuse also trips, consult your Hughes & Kettner dealer. 2) The ATTAX is connected properly, but no sound is audible. -One or several GAIN and MASTER controls may be turned all the way down. Dial in a higher setting. -A short circuit in the speaker signal chain may have tripped an internal fuse. Make sure none of the connections are shorted out and have a qualified service technician replace the fuse (identical specifications are a must). 3) The footswitch does not switch channels: -The front panel selector switch may be in the LEAD position. Set it to CLEAN (in this case, CLEAN = off). - The footswitch is not connected to the ATTAX. Plug it into the appropriate jack. 4) When accessed, the LINE OUT/LINE IN jacks cause annoying hum. -An electrical or magnetic field is causing interference. Use higher-quality cables or re-arrange the cables you are using to reduce interference to a minimum. If this still doesn't improve the situation, use a DI box. -The grounding of the connected devices may be causing a ground loop. DO NOT SEVER THE GROUND OF THE CONNECTED DEVICES UNDER ANY CIRCUMSTANCES! Try plugging all devices into the same socket via an AC power distributor/power strip. If this doesn't eliminate the noise, you must ensure the connection is galvanically separated by routing the signal through a DI box. 5) You have connected an FX processor to the LINE OUT jack and the signal is totally distorted, even when you have dialed in a clean sound. -The LINE OUT signal is overloading the input of the FX processor. Reduce the processor‘s input sensitivity ("INPUT" or "GAIN"). 6) You have connected an FX processor to the LINE OUT jack of the ATTAX and the signal's volume level is way too low. - The FX processor's output level is set incorrectly. Turn it up. 7.0 tec...