User manual DLS AMPREFEN

[. . . ] OWNERS MANUAL CAR AUDIO AMPLIFIERS Reference 100A Reference 200A ly ugh oro tall s al th anu rt to in m this u sta ead re yo R o bef TE!NO DLS Svenska AB Box 13029 SE-402 51 Göteborg Sweden Phone +46 31 84 00 60 Fax +46 31 84 40 21 E-mail: info@dls. se www. dls. se TABLE OF CONTENTS Congratulations, you have just purchased the finest auto stereo amplifier that today´s technology can offer. DLS offers a series of high quality car audio products for real music lovers, and we are sure that you will enjoy a high class car sound for many years. NOTE, read the owners manual first! To maximize the performance of your system, we recommend that you thoroghly acquaint yourself with it´s capabilities and features. Please take your time to study this manual before starting the installation. [. . . ] Twist the wire strand together and insert the wire after loosening the terminal screw. If you want an extra high class speaker cable choose any of the DLS SCP, SCK, SC 4x1 or SC 4x1, 5 cables. In mono bridge mode operation the speaker load must never be less than 4 ohm. If you are using more than one driver they must be connected in a way so the impedance still is 4 ohm when connected to the amplifier. When you run the amplifier in mono bridge mode it sees a 4 ohm load as 2 ohm. Don´t forget that the output power from a multimode connected amplifier is more than double the normal power. The speakers must be able to handle this power. -3- SPEAKER LOAD, BRIDGE MODE OPERATION SPEAKER CONNECTION EXAMPLES TWO 4 OHM SPEAKERS IN PARALLEL. + 2 ohm + + MULTIMODE OPERATION Multimode operation means that you connect one or two systems in normal stereo mode and then add one or more subwoofers in mono bridge mode to the same speaker terminals. To avoid amplifier overload you must ALWAYS use passive filters in multimode operation. The subwoofer needs a 12 dB lowpass crossover and the stereo system needs a 6 or 12 dB highpass crossover. - - NOTE !Not for bridge mode operation. MULTIMODE OPERATION SCHEMATIC TWO 4 OHMS SPEAKERS IN SERIES. + 8 ohm + + Left channel C1 + + - - - Not a recommended way to connect, the power is only half. 4 ohm Each speaker is 4 ohm + - + - Right channel C1 + + - - - This drawing shows a mono multimode connected subwoofer together with a normal stereo system. The stereo system crossover frequency is 140 Hz (6 dB highpass filter). Components with 4 ohm speakers: C1 = 200 µF C2 = 300 µF L = 10 mH with low resistance, 0, 5 - 0, 7 ohm Do not use the amplifiers internal lowpass crossover. Use only the amplifiers internal highpass crossover as a SUBSONIC filter adjusted to approx. In mono bridge mode the speaker impedance must never be less than 4 ohms. The amplifiers sees a 4 ohm speaker as a 2 ohm load. 2. 5 BRIDGE MODE OPERATION Subwoofers are normally connected in mono bridge mode to the amplifier. This is done by connecting the speaker + to the amplifiers LEFT+ terminal, and the speaker - to the amplifiers RIGHT- terminal. 12 dB lowpass crossover: Consists of a coil in series and a bipolar capacitor connected in parallel with the driver. Coil Capacitor 62, 5 Hz 14 mH 450 µF 95 Hz 10 mH 300 µF 140 Hz 6, 3 mH 200 µF Valid for 4 ohm speakers only. If you want to limit the lower frequency response, for example to a stereo system in multimode operation, a 6 dB slope crossover is perfect. 6 dB highpass filter: + 300 µF 200 µF 150 µF 2 266 Hz 400 Hz 533 Hz 4 133 Hz 200 Hz 266 Hz 8 67 Hz 100 Hz 133 Hz This table shows the crossover frequency of a 6 dB highpass filter at different impedances and frequencies. 2. 8 FINAL SYSTEM SETUP Before connecting the amplifier to the battey, recheck all connections. When you connect the main fuse you will see a little spark, this is normal. The level settings might need to be readjusted after 25 - 30 hours of use. 2. 9 PROTECTION CIRCUITS The amplifiers have an internal high current protection circuit shutting down the amplifier if the current draw is too high. [. . . ] CONNECTION OF Reference 200A The following examples shows some normal ways of connecting this 4-channel amplifier. The four channels are divided in two amplifier blocks with the signal input to the right, then the level control, the filter and to the left the speaker terminals. Reference 200A can be connected in many different ways: 1. For example one pair in the back doors and one pair in the hat rack connected to the rear output on the amplifier. One front (and if you want also a rear system) in the doors or dashboard, and one subwoofer in mono bridge mode to the amplifier rear output. [. . . ]