User manual HELIX H1000

[. . . ] This is performed by means of four fixing screws screwed into a mounting surface offering sufficient retention and 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 petrol 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 doubleskin trim panels/mouldings. General instruction for connecting the amplifiers The HELIX amplifiers may only be installed in motor vehicles which have a 12-volt minus pole connected to the chassis ground. [. . . ] 11 Add-on subsonic filter If reqiured an additional subsonic filter (26Hz/30dB/oct can be switched on. Position A: subsonic filter off Positiong B: subsonic filter on 12 Speaker connection terminals The impedance minimum of all connected speakers must not be lower than 2 ohms. When tuning bass reflex systems, this value will soon be fallen below. Please check with the maker of your subwoofer. When using bass reflex systems we suggest to have the subsonic filter (switch 11, position B) switched on. Never connect the speaker cables to the vehicle ground (chassis). 13 Level controls for input sensitivity These controls can be used to match the input sensitivity to the output voltage of the connected head unit. These controls are not volume controls and are solely intended for the purpose of sensitivity trimming. The control range extends from 600 mV to 8, 0 V. 14 Damping factor control For individual sound tuning the damping factor can either be raised (more bass) or lowered (balanced and warm). 15 Operation mode selector switch Position A: The amplifier works linear, the integrated active frequency cross over and the parametric equalizer are switched off. Position B: The input signal is sent to parametric equalizer and can be adjusted with the controls 16 - 19. Position C: The input signal is sent to the parametric equalizer and to the active frequency crossover and can be adjusted with the controls 16 - 19, the switch 20 and the controls 21 and 22. Parametric equalizer With its integrated highly innovative parametric equalizer Equalizer adjustment Fig. 17 14 the H 1000 ESPRIT amplifier offers a wide range of individual subwoofer sound tuning. 16 Phase control This control enables the bass signal to be shifted by 180° in order to achieve optimum delay equalization with the other channels. 1) 17 Setting the center frequencies Control 17 can be used to select a frequency of 50 - 150 Hz on the preset low-pass frequency band (see control 22). This center frequency can be raised using control 26, by between 0 and 9 dB. This is desirable if certain frequencies of the subwoofer are to be enhanced (kick bass) or corrected. 2) 18 Band width adjustment Control 18 can be used to enhance the Q of the frequency set at control 17. The resultant band width can be infinitely varied from 10 to 110 Hz. 3) 19 Level control for raising the cut-off frequencies This control enables the center frequency set at control 17 to be raised from between 0 and 9 dB. [. . . ] Control 21 is used for high pass setting and control 22 for low pass setting. 15 Technical Specifications H 400 ESPRIT Cont. 20 Hz - 20 kHz, +/- 0, 2 dB Total harmonic distortion . . 20 Hz - 20 kHz, +/- 0, 2 dB Total harmonic distortion . . 2 x 30 Ampere Dimensions (H x W x D) mm . [. . . ]