User manual HELIX HXE 100

[. . . ] With the HXE 100, frequency response deviations common in vehicle sound systems can be individually equalized (i. After the frequency response has been adjusted to the optimum level, the overall loudness volume of the complete music system can be regulated with the VOLUME control with virtually no loss whatsoever. In addition, the subwoofer level can be adjusted using the SUB Volume control so that it is louder or quieter according to the listener's taste. A separate CD player, can be connected to the AUX input. [. . . ] As the unit does not require any special cooling, it can be located where space is tight, subject to the above conditions being met. Before commencing the electrical connection work, disconnect the negative terminal of the vehicle battery and, Now connect the black wire of the power supply plug to the common ground (chassis) connection of the car radio. The red wire provided with a fuse should be connected to a steady positive + 12 Volt pole. connect the remote wire to the antenna plus (aerial positive) output of the radio. Then connect the plug to the appropriately marked power input socket. Ensure that the right and left channels are correctly connected. Now connect the outputs to your amplifiers (front panel output to the front amplifier, rear panel output to the rear amplifier). If you have a separate amplifier for your subwoofer, connect the subwoofer output (SUB Output) to it. In order to avoid ground leakage, ensure that the external contacts of the cinch connector do not touch the unit chassis. Settings Determine the maximum signal output voltage from the technical documentation relating to your car radio (CD player etc). Set the individual input gain controllers in the cover of the unit accordingly. If there are doubts, first turn these controllers fully counter-clockwise and then open each channel during system operation until, with the volume control of the HXE 100 at maximum output, all distortion is eliminated and all the downstream components are properly protected. The concealed controls for the cutoff frequencies should first be adjusted using the screwdriver supplied so that all the channels are identically set at the mid position (i. The associated volume controls should also be set to their central position, i. Set your subwoofer crossover to the filter frequency required for the subwoofer type employed (in most cases this will be 60 - 100 Hz). The volume control should first be turned fully counterclockwise (quiet). After you have made sure that all the plug connections and all the other components of the hifi system have been correctly fitted, switch on the system and carry out an audio test, initially at low volume. subsequently , increase the volume to maximum by turning the volume control clockwise. If distortions should occur as the volume increases, turn the input gain controls fully counter-clockwise as described above. With the volume control at maximum, determine the maximum gain by gradually turning the input gain controls in a clockwise direction. [. . . ] The 4 frequency bands are designed so that typical frequency response problems caused by car interiors can be smoothed out. In other words, by measuring the frequency response, you can adjust the frequency profile to a linear or, indeed, any other pattern in accordance with your listening desires and tastes. The individual controls allow the level to be raised or lowered by +/- 18 dB within the range indicated. By using the concealed cutoff frequency controls, you can now start to fine-tune the music output. [. . . ]