User manual HELIX SPXL 1000

[. . . ] The attractive typical HELIX Competition design makes this amplifier an outstanding and top of the class product. General installation instructions for HELIX amplifiers To find out how HELIX amplifiers work best for you, read this manual carefully and follow the instructions for installation. [. . . ] 2 Connecting the remote lead The remote lead is connected to the automatic antenna (aerial positive) output of the head unit (radio). Be connected with the pre-amplifier output of the line-outputs of the headunit or with a pre-amplifier. This connectors are gold-plated to ensure a better signal transmission. 10 Level controls for input sensitivity These controls can be used to match the input sensitivity of the individual channels 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. 11 Bassboost control To raise the bass signal from 0 to 18 dB at the center frequency being adjusted by control 12. 4 Connecting the ground cable The ground cable should be connected to a central ground reference point (this is located where the negative terminal of the battery is grounded at the metal body of the vehicle), or to a bright bare-metal location on the vehicle chassis, i. The impedance per channel should not be lower than 1 ohm as overheating could cause a shut down of the amplifier. 6 Speaker connection for Master and Slave Mode See figures on this page and instructions following No. 12 Control to raise the center frequency This control adjust the frequency from 40 to 120 Hz, which could be raised from 0 - 18 dB by control 11. Signal inputs Signal outputs Level controls for input sensitivity Bass boost control Control to raise the center frequency Frequency control for low pass 7 Protect Bridge To reach maximum power from the Master and Slave Mode during competition (60 to 80 Hz test tone) for a low-ohmic subwoofer combination, the protection circuit can be deactivated by bridging the Protect Bridge contacts. 14 Phase control This control enables the phase of the bass signal to be shifted by 180° in order to achieve optimum delay equalization with the other channels. The products checked and tested carefully during the entire production process. In the case of service note the following: 1) The 2 years warranty period commences with the purchase of the product and is applicable only to the original owner. [. . . ] Attention: Make sure that amplifier1 is switched on master and amplifier 2 is switched on slave. The SPXL amplifier has several electronic protection circuits that shut off the amplifier at overheating, overloading, short-circuit on loudspeaker, low-ohmic mode or defective power supply. [. . . ]