Subwoofer Operating ControlsYour Definitive Technology ProSub 600 subwoofer is equipped with a full comple-ment of operating controls to ensure complete flexibility and maximum performance inany installation. Most of them basically are the "set and forget" type, although occa-sionally certain controls will require minor adjustments.Level ControlThis control varies how loud the subwoofer plays. Please follow the level controlsuggestions in hook-up section.Low-Pass FilterYour subwoofer's back panel features a continuously variable low-pass filter. Ifyou are using the low level LFE input, you will normally tum the Low-Pass FilterControl all the way up to 150. If you are using Method 1 System Hook-up you willnormally set the low-pass filter to between 10 and 12 o'clock. Always remember theexact setting will vary with different rooms and different positions as well as personaltaste, so we encourage you to experiment.TroubleshootingIf you experience any difficulties with your subwoofer, try the suggestions describedbelow. If you are still having problems, please consult your Definitive TechnologyAuthorized Dealer for assistance.1. Make sure all your system interconnects and power cords are solidly intheir place.2. Should you experience any level of ground hum or noise, try plugging the sub-woofer into the same circuit as your amplifier. Please note that some cable TVhookups induce hum into the whole system and require a special isolation device.Please consult your dealer.3. The system is provided with sophisticated internal protection circuitry. If for somereason the protection circuitry is tripped, please turn down your system's volumeand wait five minutes before trying the system again. If the amplifier should over-heat, the system will tum itself off until the amplifier cools and resets.4. Check to be sure that your power cord has not been damaged.5. Check that no foreign objects or liquid has entered the cabinet.6. If you cannot get your subwoofer to turn on or if no sound comes out and you'resure the system is set up properly, please bring the subwoofer to your DefinitiveTechnology Authorizeq Dealer for assistance.