Audiovox AXT-550 Owners Manual - Page 11

from the system. If, however, there is still output from the amplifier when the car stereo volume control is at its minimum setting, or the output level increases too fast with a small rotation of the volume control, adjust the Level control to decrease the output from the system. Once the correct setting is found, these controls should not require any further adjustment. 4 Crossover Selector This switch allows selection of the frequency filters that permit the amplifier to be used to reproduce the entire audio range or just the bass range. In the "FULL" position of the switch, the response is flat and unaffected so the entire audio frequency range is reproduced by the amplifier. Use this setting if the amplifier is being used to power a full range speaker system.In the "LPF" (Low-Pass Filter) setting, only the bass frequencies below the frequency set by the Crossover Frequency Control 5 will be amplified and fed to the speakers. Use this setting if the amplifier is being used to power a sub-woofer speaker system. HPF(High-Pass Filter): Only mid-high tone (50Hz-250 Hz) Speaker. Adjust it to the appropriate position for the characteristics and crossover frequency requirements of the speaker system with which the amplifier is being used. 6 HPF Crossover Frequency Control This Control selects the crossover frequency when the Mid-High Crossover Selector 4 is in the "HPF" setting. Adjust it to the appropriate position for the characteristics and crossover frequency requirements of the speaker system with which the amplifier is being used. 7 Bass Boost Frequency Control Allows the addition of up to +18dB increase in sound level in lower frequencies (0~18dB). 8 High Level Input Connection If the car stereo not does not provide low-level outputs, the amplifier may be connected via the speaker (highlevel) outputs from the stereo. Wire the speaker leads from the car stereo to the 5-pin adaptor harness as shown in the diagram (shielded cable is not required for this application) and plug the connector into mating HighLevel Input socket on the amplifier. Carefully splice and insulate all wire connections. 5 LPF Crossover Frequency Control This Control selects the crossover frequency when the Sub woofer Crossover Selector 4 is in the "LPF" setting. -11-