500 Watt Subwoofer Amplifier User Manual - Ljudia

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Thank you for purchasing the DSW-500N Subwoofer Amplifier. It has been designed and built to provide years ofhigh quality sound reproduction, and is ideal for use in both home stereo and home theatre systems. Theamplifier has been engineered to include features like a choice of high or low level audio connections selectablecrossover frequency, comprehensive internal production against shorted speaker loads, thermal faults, andoverload conditions.Features:• RCA and balanced level inputs for connection to any system• Full frequency balanced level outputs• Soft-clip circuitry provides clean output even with demanding program material• Full complement of protection circuits for extreme reliability• Reverse phase switch for best integration with satellites• Bypass gives fully frequency to the inbuilt amplifier• Switchable stereo-mono, HPF- LPF- and subsonic filters• Variable frequency 4 th order low-pass crossover for a clean transition to main speakers• Advanced soft clip circuitry improves headroom and protect connected speakers• Switchable 115/230V input voltage(2)
1.) Low-Level inputs (Left/Right)RCA- and balanced XLR style jacks what will accept standard line level inputs from a pre-amp level source. Theywill accept a stereo signal and internally combine it into mono. Both left and right input jacks must beconnected to the source in order to drive the amplifier to full output.2.) Low-Level outputs (Left/Right)This balanced XLR output allows the low level input signal to be daisy chained through the internal preamps toother amplifiers or powered satellites with no alternation (EQ) to the original signal.3.) LevelThis control will match the amplifier’s input sensitivity to the output of the pre-amp source. If the source has avariable control, we recommend that the user spend a moment or two determining the best balance betweenthe two controls. When a balance is found between low noise, linear level control, and sufficient level to drivethe amp to the required output, the level knob can be considered to be the “volume control” for thesubwoofer or full range system.4.) BypassThis two position (ON or OFF) switch gives in ON mode full frequency to the amp which can be used as a fullrange amplifier (subsonic- and phase switch can still be used).In OFF mode will the signal supply the sweep control and the amp is suitable for subwoofer system.5.) HPFThis two position (ON or OFF) switch gives in ON mode a slight decreasing of the treble from approx 200 Hz andup (only in bypass ON mode).6.) SweepThis control works only in bypass OFF mode and is used to establish the highest frequency that the subwooferwill reproduce and has a range between 30 to 200Hz with slop of 24 dB per octave. If you are using the systemfor music and your main speakers have good bass capability, you could set the control to a fairly low value at40, 60, or even 100 Hz. If the main speakers are smaller or do not have much bass output, set the controlhigher. Experiment with the amount of “overlap” that you experience when all speakers are playing in thesame range. This can be helpful when integrating the subwoofer with the rest of the system and with the room.7.) LPFThis two position (ON or OFF) switch gives in ON mode a slight decreasing of the bass from approx 40 Hz anddown. It is useful to remove the extremely low disturbing frequencies (only in bypass ON mode).8.) PhaseThis two position (NOR = 0° and REV = 180° phase) switch helps to compensate for different in the acousticaland electrical characteristics between the subwoofer or full range system and the main system speakers. Therelative locations of speaker in the system can cause significant disturbances in speaker in the system due totime delay issues, or the destructive phase interferences that can occur at certain frequencies. The use of thisswitch in conjunction with altering the location the location of the subwoofer or full range speaker can have adramatic effect on system integration. The “NOR” setting would be considered the normal or default setting,but be sure to experiment during system set-up. This feature works regardless of the bypass mode.9.) SubsonicThis four position (OFF, 20, 35 and 50 Hz) switch is very useful to eliminate disturbing low frequencies. The bestis to experiment for best results. This feature works regardless of the bypass mode.10.) Stereo-MonoThis two position (Stereo-Mono) switch gives in STEREO mode +3 dB and in MONO mode can the amp only besupplied by the left inputs.(3)
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500 Watt Subwoofer Amplifier User Manual - Ljudia

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