User manual BLAUPUNKT PA275

[. . . ] BLAUPUNKT SPECIFICATIONS - PA275 AND PA2100, 2/1 CHANNEL AMPLIFIER Below is a basic trouble-shooting guide to assist in seeking out and correcting a problem that may occur in the installation process. Although lengthy, this chart cannot address every single problem possible but mainly the ones most common. PARAMETER/FEATURE Channels Size ( W x H x D) Weight (with housing) Crimping style speaker terminals?Maximum terminal wire size Subsonic filter Separate front/rear or left/right gains?Fuse Type Speaker short, short to +12V, and short to ground protection? [. . . ] GAIN CONTROL - The gain control allows for a range of 0. 3-6Volts input. This means that if the setting is a 0. 3V, it only takes 0. 3Volts to drive the amp to full output. (Such a low setting allows for the amp to be easily overdriven and more susceptible to noise so a mid-position is highly recommended for most radios. ) LOW-PASS FREQUENCY - If the mode selector is in the "LP" position the amplifier passes only low frequency sound. The upper limit for such sound is set via this control. For bass, a value just below 100Hz is usually best. HIGH-PASS FREQUENCY - If the mode selector is in the "HP" position the amplifier passes only mid and high frequency sound. The lower limit for such sound is set via this control. CROSSOVER MODE - Depending upon the system design chosen, you need to set the amplifier in the proper "mode" be it LP, Fullrange, or HP. The low-pass and high-pass frequency settings are explained above. The "full-range" setting simply allows for the amp to pass all audio frequencies without any kind of crossover filter application. (This is common with 6x9" fullrange coaxial speakers for example. ) L (+) L (­) white white/black black gray gray/black "HLA1" High Level Adaptor NOT USED R (+) R (­) "Common Ground" Radio Outputs (LOOP-THRU) INPUTS R (BR) L L (+) NOT USED white white/black black gray/black gray "HLA1" High Level Adaptor Radio chassis or common speaker ground NOT USED R (+) (L) (GND) (R) REMOTE GAIN CIRCUITRY REMOTE GAIN CIRCUITRY Should the installer wish to create their own remote gain control, or attempt to daisy chain the gains of multiple amps, refer to the adjacent circuit design for proper connection. This should ONLY be attempted by a very highly qualified installation technician. If improperly done DAMAGE WILL OCCUR to the amplifier and WILL NOT be covered by warranty!(We put this information in this manual because of the interest of our highly skilled Blaupunkt installers - the average consumer should NOT attempt this on their own!) You should ONLY loop the SIGNAL pin to other amps - DO NOT carry the ground and +12V pin voltages to adjacent amps. ­7 ­ "Ganged" 20k/ch Resistor pack SYSTEM CONFIGURATION #1 Full-Range Full-Range or High-Pass Connect Speakers as shown. For best sound, always make sure to connect + to + and - to - X-OVER MODE HP LP FULL Full-Range Full-Range or High-Pass 2 Channel Full-range -or- High-Pass Mode This installation is most popular for listeners who want to simply increase the power to the rear speakers in a car. The resulting performance is most commonly a louder overall sound field from the rear. But, such a system's biggest benefit is the additional bass response since the bass control of the radio can be turned up without distorting the amplifier. Such a system is not necessarily louder in the mids and highs but is able to play louder in the low frequencies due to this additional power. This leads to an overall richer and stronger sound experience for the listener without additional subwoofer boxes or electronics that may complicate the system or take up more room. Such a system WILL NOT equal the performance of a subwoofer system but will certainly be a pleasant improvement. With the addition of a high-pass filter, this amplifier is set up to complement a dedicated subwoofer amplifier/speaker system. [. . . ] To obtain performance of this warranty, contact the nearest Blaupunkt authorized repair facility or our nearest office. A dated purchase receipt or other proof that the product is within the warranty period will be required in order to honor your claim. Carefully pack the unit and ship prepaid to the servicing location. For further information, write to the Robert Bosch Corporation, 2800 South 25th Avenue, Broadview, Illinois, 60153, attention Blaupunkt Customer Service Department or call 1-800-266-2528. [. . . ]