User manual HELIX HXS636

[. . . ] Yours, Audiotec Fischer Team Installation Instructions Before you start installation, disconnect the car battery at the minus pole. We would urge you to have the installation work carried out by an authorized specialist as verification of correct installation and connection is a prerequisite for warranty cover of the Helix amplifiers. Install your amplifier at a dry location with sufficient air circulation to ensure adequate cooling of the equipment. [. . . ] For safety reasons, the amplifier must be secured in a professional manner. For this use the attached four fixing screws and fix them into a mounting surface offering sufficient stability. Before drilling the holes for the screws, carefully examine the area around the installation position and make sure that there are no electrical cables or components, hydraulic brake lines or any part of the tank located behind the mounting surface ­ otherwise these could be damaged. You should be aware of the fact that such components may also be concealed in the double-skin trim panels/ mouldings. Instruction for connecting the amplifier The Helix HXA 20/ HXA 20X may only be installed in motor vehicles which have a 12-volt minus pole connected to the chassis ground. Any other system could cause damage to the amplifier and the electrical system of the vehicle. The plus cable from the battery for the complete system should be provided with a main fuse at a distance of max. In this case the total impedance of the connected speakers must be 4 ohm or higher. in stereo mode the connected total impedance per channel can be 2 ohm or higher. In mono mode the total input signal of both channels cannot be higher than 8. 14 - 15 Level adjustment for input sensitivity These controls can be used to match the input sensitivity of the individual channnels A to B to the output voltage of the connected head unit. These controls are not volume controls and are solely intended for the purpose of sensitivity trimmming. Only for HXA 20X: The HXA 20X has an active adjustable crossover with a variable frequency range from 15 Hz to 5000 Hz. to adjust the frequencies use switch 10 ( HP , Full range , LP ) and switch 11 ( 15 Hz - 1 kHz and 1 kHz - 5 kHz ) and the potentiometer 13. [. . . ] to adjust the frequencies use switch 10 ( HP , Full range , LP ) and switch 11 ( 15 Hz - 1 kHz and 1 kHz - 5 kHz ) and the potentiometer 13. The residual signal is applied to RCA connectors 17 and 18 where it can be used to connnect an additional amplifier. Example: If the chanels A and B are switched on Highpass 180 Hz, the frequencies up to 180 Hz (Lowpass) are provided to the RCA connectors 17 and 18, e. [. . . ]