User manual DLS CAT31

[. . . ] Check the voltage with a multi meter. Installation Before you begin the install Before you begin you need to read the manual, to have some tools, cables and other material available. There is one such list of material on the following page. Amplifier location Important Allow air circulation around the amplifier. Amplifier protection fuse blows at low volume: One or more speaker cables are shorted. The cables must not have a connection to earth. The amplifier turns off after 10-30 minutes: The amplifier is overheating due to inadequate ventilation. Overheating can also be caused by an impedance load below the level permitted. The DLS Classic series of amplifiers have a compact design that allows great flexibility in mounting. [. . . ] Use a wire brush, a scraper or a piece of an abrasive sheet to clean the metal. +12V REM GND +24V REM GND Power Light / Protect light The power light (green ) comes on when the amplifier is turned on. The protect light ( red ) comes on when the amplifier shuts down from overheating or short circuit. Power (Green) Protect (Red) Fuses Use only 20 ampere ATC blade type fuses. CAT31 uses two 20 ampere fuses. 20A 4 CAT31 Input and controls Input Wiring Inputs may be low level from the RCA output of the car stereo or high level from the car stereo speaker output. Low level = RCA is to prefer for the best sound quality. Important Use either the low level or the high level input, do not use both at same time. Low level input Use a pair of shielded stereo audio cables with RCA type jack. Avoid placing the RCA cable close to speaker cables, power cables and remote control cable. High Level Input Connect left and right speaker wires coming from the car stereo to the high level input as shown. You must connect both plus and minus as the inputs are balanced, connecting plus only gives lower level and bad sound quality. By changing the polarity of plus and minus, you can change the phase. High Input White White/black Grey/black Grey :A ch. + :A ch. :B ch. :B ch. + Input Level control ch. A/B/C (Level) The input level control, 5V ­ 0, 25 V, matches the output of your radio to the input of the amplifier. After installation is complete, make sure the input of the amplifier is turned down all the way ( counter-clockwise at 5V ). Play a tape or CD, make sure all bass or treble settings or equalizer are flat, and turn the volume of the radio up until you just start to hear distortion. On the amplifier increase the input level control ( clockwise or to the right ) until you just start to hear distortion, then back the level control just a bit. Now your radio and amplifier levels are matched. Level 5V 0, 25 V Subsonic filter ch. C The Subsonic filter blocks the very Subsonic deepest frequencies from reaching the subwoofers. The filter crossover is 25 Off On Hz and can be disconnected. Low pass filter ch. C (LPF) The LPF ( low pass filter ) allow low frequencies only and blocks higher frequencies. C (PHASE) The phase control can be set continuously from 0 - 180 degrees. This is very useful when you want to adjust the bass sound for best front stage image. Start on 0 and turn the control slowly clockwise until you experience the bass sound coming from the front. You may have to change the polarity of the speaker connection to get the best result. Automatic turn on when using high level input. [. . . ] If it is the other way around, the speaker has been connected backwards and it must be removed and connected correctly. If your system also has a subwoofer connected through a passive 6 or 12 dB crossover, try to connect this with various polarity and judge what sounds best. The phase shift in passive crossovers sometimes makes it necessary to change polarity. + Batteri 1, 5 Volt + - - Professional Tip: Installing in trunk When installing the amplifier in the trunk, run the power wires along the same path as the other vehicle wiring. you will have to remove the door sill trim and the carpet. Professional Tip: Securing wires Use wire ties to bundle together when possible. [. . . ]