Assessments - 3, GPA: 4
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Facilidade de uso
If the specification is not available, please follow the instructions listed below. X1 POSITION: 100mV–1V (Typically for RCA Input) • Setting for Factory (OEM) Source Units: To check the amount of voltage that is present from the source unit, take a multi meter, or a volt/ohm meter, on the A/C setting, (range from 100mV up to 10 volts) attach the positive and negative leads directly to any exposed speaker. It will not matter if the polarity is correct, it will read the same amount of voltage. X10 POSITION: 1V–10V (Typically for Speaker Level Input) Note: It is important not to have the amp set up to receive a low voltage signal and give it a high voltage signal. Doing this can cause damage to the amp. 2. Adjusting The Gain Control(s) – Before you start setting your amp gains, be sure to defeat all EQs (“off” position). You want to set the gain levels properly BEFORE applying any equalization. Start with the source unit’s volume around . of the way up, and the gain on the amp all the way down (counter-clockwise). Slowly increase the gain clockwise until the speaker starts to distort. Immediately decrease gain until the distortion goes away. This will be a good reference point on the volume control to where the signal starts to distort. Remember every CD will be different; use common sense and constantly listen for obvious distortion and adjust volume accordingly. The gain on the amp has nothing to do with how much power the amp can produce, just how fast the amp puts out max power. Just like in an automobile, full throttle is very rarely needed. 3. Adjusting the Hi, 12dB / Low, 24dB Mono @ 40Hz – 350Hz Variable X-over Frequency Controls – • Setting for Subwoofers: First enable the electronic crossover by selecting the “ON” position of the X- OVER switch, and then select the “L-PASS” (Low pass) position on the L-PASS/H-Pass switch. Next, using “L-PASS CROSSOVER” you now have control over what frequency you want your amp to start crossing over your signal. By turning this control all the way counter-clockwise, you are crossing the signal over at 40Hz (the range is counter-clockwise 40Hz to clockwise 350Hz). This means that the amp will send the woofers frequencies from 20Hz to 40Hz and then start to taper down as the frequencies go over 40Hz (24dB/octave roll off). The industry standard for low pass crossover point is right around 90Hz. However by experimenting with the cross over point (higher or lower) you will find what sounds best in this install. This amp uses a 24-decibel per octave roll off, which is pretty steep, or tapers off fairly quickly from the crossover point. This design complements both the subwoofer and the mid to provide greater musical detail. • Setting for Components and Separates: First enable the electronic crossover by selecting the “ON” position of the X-OVER switch, and then select the “H-PASS” (High pass) position on the L-PASS/H-Pass switch. Next, using “H-PASS CROSSOVER” you now have control over what frequency you want your amp to start crossing over your signal. By turning this control all the way counter-clockwise you are crossing the signal over at 40Hz (the range is counter-clockwise 40Hz to clockwise 350Hz). This means that the amp will send the components or separates frequencies from 40Hz to 20kHz and then start to taper down as the frequencies go under 40Hz (12dB/octave roll off). The industry standard for high pass setting crossover point is around 120Hz. When the amp is in HP setting and the X-over point is set to 120Hz, the amp will send the speakers frequencies from 120Hz to 20kHz. This crossover network allows the drivers to recreate the frequencies within a precisely designed range so that the speakers do not become distorted by trying to reproduce frequencies that they are physically unable to reproduce. This feature ensures that the components or separates do not receive low bass notes. The 12dB/oct means the slope, or the amount of other frequencies that will be affected, is fairly narrow. This design complements both the subwoofer and the mid to provide greater musical detail. • Setting For Full Range (No Crossover): To Disable the electronic crossover, select the “OFF” position of the X-OVER switch. This setting will allow the amplifier to play all frequencies. 4. Adjusting Quasi Parametric Equalizer – In some applications, the bass amplifier needs some help in boosting or cutting certain frequencies. A quasi parametric equalizer is distinguished from a parametric equalizer in that it allows the user to control only the level and the center frequency of the boost or cut but not the “Q”. The following steps describe what the two controls of the parametric Bass EQ do in isolation. It is important to understand these behaviors, because they must all be considered when setting up the Bass EQ. • Setting the Frequency: Begin listening for the loudest musical spot or range within the bass range of your sound system. Adjust the center frequency to match this point. For...