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Instructions Blaupunkt, Modèle PCA2120

Fabricant : Blaupunkt
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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.) CROSSOVER MODE SELECTOR -Depending upon the system design chosen, you need to set the amplifier in the proper “mode” be it LP, Flat, or HP. The low-pass and high-pass frequency settings are explained above. The “Flat” 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.) PROTECTION LED -This light turns on if the amplifier senses a severe problem, such as a speaker short circuit. POWER ON LED -This light will turn on when the amplifier receives a +12V turn on signal from the radio. If the amp is properly wired, but the light does not turn on, there may be a short circuit condition that the amp is protecting itself from. – 7 – SYSTEM CONFIGURATION #1 1 Channel Bridged Subwoofer Mode By electrically connecting a subwoofer speaker in the way shown above, you are able to greatly increase the output power delivered from the amplifier to the speaker. Such a circuit increases the voltage “swing” across the speaker which increase the power seen by a factor of 2 to 4 times that in stereo mode. This is a very logical set-up for systems that are space limited to allow for only one subwoofer in a vehicle. The number and box Subwoofer Full-Range Full-Range Full-Range Full-Range 4. (main) For higher output, you can connect a subwoofer to two output channels. Look for the + and – to indicate the correct connections. volumes are compensated by simply more amplifier power pushing a single speaker. Such a configuration is also a surprisingly good performer. These increases in power are always welcome but you must take care to avoid low impedances (below 4 ohms) since most amplifiers will overheat and shut down if over-driven into such a configuration. You must also take care that you are not exceeding the thermal, or excursion, power limiting values for the woofer. Surprisingly high power levels can be achieved with such a system without realizing it thus quickly damaging the woofer. SYSTEM CONFIGURATION #2 2 Channel Dual Subwoofer Mode The largest improvement in sound quality always comes when adding some kind of subwoofer via a dedicated subwoofer amplifier and electronics crossover. The electronic crossover Subwoofer Full-Range Full-Range Full-Range Full-Range ensures minimal overlap of the bass response with the mid and high frequencies from the other speakers resulting in a more accurate performance compared to conventional coaxials with additional power. By installing this amplifier in the stereo mode, you are able to drive two subwoofer speakers and in to low impedance loads (e.g., 2 ohms) without over heating the amplifiers. Also, such an installation more easily supports a standard 2 speaker woofer box that may already be constructed. Since two woofers can play 6 decibels louder than one at a given power (due to acoustical laws of “mutual-coupling”), the resulting sound pressure level is substantial. This is probably the most common use for a conventional two channel amplifier there is. – 8 – SYSTEM CONFIGURATION #3 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 Full-Range Full-Range Full-Range OR HP Full-Range OR HP Connect Speakers as shown. For best sound, always make sure to connect + to + and - to - 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. This allows for smaller (e.g., 5" or 6") satellite speakers to operate most efficiently without being over-driven in the bass region where a dedicated subwoofer system operates most efficiently. SYSTEM CONFIGURATION #4 3 Channel Multi-Mode (Passive) The multi-mode system is a “poor-man’s” satellite/subwoofer system. This amplifier is able to drive speakers in stereo mode and at the same time drive low frequencies to a dedicated subwoofer speaker. By inserting inductors (coils) and capacitors, ...