Pioneer DEH-P940MP Owner's Manual - Page 44

Audio Adjustments Level The difference in reproduced levels between speaker units can be corrected. Slope Adjusting the H.P.F./L.P.F. slope (filter attenuation slope) lets you adjust the continuity of sound between speaker units. • The slope indicates the number of decibels (dB) the signal is attenuated when the frequency is one octave higher (lower) (Unit: dB/oct.). The steeper the slope, the more the signal is attenuated. Phase You can switch phase (normal, reverse) for each speaker unit's input signal. When the continuity of sound between speakers is imprecise, try switching phase. This may improve the continuity of sound between speakers. Points concerning network adjustments Cut-off frequency adjustment • With the low-range speaker installed in the rear tray, if you set the "L LPF" cut-off frequency high, bass sound is separated so that it appears to come from the rear. You are recommended to set the "L LPF" cut-off frequency to 100 Hz or lower. • The maximum input power setting for middleand high-range speakers is usually lower than that for low-range speakers. Remember that if the "M HPF" or "H HPF" cut-off frequency is set lower than required, strong bass signal input may damage the speaker. Level adjustment • The basic frequencies of many musical instru- ments are in the middle range. First perform middle-range level adjustment, followed by high-range and then low-range level adjustment in that order. Slope adjustment • If you set a small absolute value for the slope (for a gentle slope), interference between adjacent speaker units can easily result in degraded frequency response. • If you set a large absolute value for the slope (for a steep slope), continuity of sound between speaker units is degraded, and sounds appear to be separated. • If you set the slope to 0 dB/oct. (Pass), the audio signal bypasses the filter, so the filter does not have an effect. Phase adjustment • When the cross-over point value for filters on both sides is set to -12 dB/oct., the phase is reversed 180 degrees at the filter cut-off frequency. In this case, reversing the phase assures improved sound continuity. Normal phase Reverse phase Crossover point Muting the speaker unit (filter) You can mute each speaker unit (filter). When a speaker unit (filter) is muted, no sound is output from that speaker. • If you mute the selected speaker unit (filter), "MUTE" blinks and no adjustments are possible. • Even if any speaker unit (filter) is muted, you can adjust the parameters for other speaker units (filters). 1. Press AUDIO and then press NW to select the network adjustment mode. 43