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Sound adjustment
SW-505D (EN)
22
How to use the VOLUME CONTROL knob, PHASE select key, CROSSOVER control knob and SLOPE selector switch
The VOLUME CONTROL knob, PHASE select key, CROSSOVER control knob and SLOPE selector switch can be adjusted to match the condition of the listening room and/or the characteristics of the left and right front speakers.
2 Crossover slope adjustment (SLOPE selector switch) 24 dB position: To be used when the Subwoofer is combined with bass-reflex type front speakers.
Front speaker Bass-reflex type
CROSSOVER control knob and SLOPE selector switch function
0 (dB)
Frequency
12 dB position: To be used when the Subwoofer is combined with acoustic air-suspension type front speakers.
Front speaker Acustic Air Suspencion type
CROSSOVER control knob Frequency
Sound Pressure Level
Sound Pressure Level
24dB 12dB SLOPE selector switch Frequency
The characteristics above express the images and the details are different from the actual characteristics.
Examples of standard adjustment according to the type of front speakers
1 Crossover frequency adjustment (CROSSOVER control knob) Front speaker
Small speaker Medium speaker Large speaker Sound Pressure Level
0 (dB) position: To be used for reproducing sound from the subwoofer without electrically attenuating the high-frequency components in the input signal. Use this position when the high frequencies in the subwoofer signal have already been cut by the Dolby Digital or DTS circuitry. The crossover frequency adjustment is invalid when this position is set.
Note
Depending on the listening room condition and the front speaker characteristics, other adjustment setting than the examples shown above may provide more natural bass sound and more effective bass reproduction. Try various adjustment settings to select the optimum one for your listening room.
In case of difficulty
A simple mistake may often be misunderstood as a failure. In case of a trouble, check the applicable symptom in the following table before calling for service.
Symptom
ESPA�OL ITALIANO NEDERLANDS DEUTSCH FRAN�AIS
No sound is output.
Cause
÷ The connection cords are not plugged into the jacks properly. ÷ The volume is set to the minimum. ÷ The connected amplifier or receiver does not output the subwoofer pre-out signal (applicable when the amplifier or receiver is equipped with the pre-out on/off function). ÷ The speaker cords are connected in the reverse phase. ÷ The phase selection is not correct. ÷ The pre-out signal level of the connected amplifier or receiver is set to the minimum (applicable when the amplifier or receiver is equipped with the pre-out level control function). ÷ The interfered unit is installed near the subwoofer.
Remedy
÷ Connect them properly by referring to �Connections�. 7 ÷ Adjust to an optimum volume. 0! ÷ Switch the subwoofer pre-out switch of the connected amplifier or receiver to ON.
Sound volume is low.
÷ Connect the R and L cords with correct + and - polarity by referring to �Connections�. 7 ÷ Set the phase to a different phase. 0! ÷ Adjust the pre-out level of the connected amplifier or receiver to an optimum level.
Radio broadcasts are interfered with by noise.
÷ Install the subwoofer more apart from the radio receiver.
