Eclipse CD8445E Owner's Manual page 64

Various Settings
-3dB
Bass range
20Hz
For example, when adjusting the HPF, frequencies that are lower than the specified frequency are
progressively dampened, rather than simply not being played back at all. The "slope" adjustment
function is the function that is used to adjust these dampening characteristics.
The slope characteristics of a filter are such that with larger slope values (for example 12 dB/oct),
the slope becomes steeper, and so the amount of sound mixing in with neighboring bands becomes
less so that only the target band is played back. However, it also causes the merging of sound
between speakers to become poorer and can result in greater distortion.
• The crossover function is a filter that allocates specified frequency bands.
• A high-pass filter (HPF) is a filter that cuts out frequencies that are lower than the specified
frequency (bass range) and allows higher frequencies (treble range) to pass through.
• A low-pass filter (LPF) is a filter that cuts out frequencies that are higher than the specified
frequency (treble range) and allows lower frequencies (bass range) to pass through.
• The slope is the signal level at which frequencies that are one octave higher or one octave lower
are dampened.
The larger the slope value, the greater the slope. In addition, when "PASS" is selected, the slope
is eliminated (sound does not pass through the filters), so that the crossover function has no
effect.
When this deck is in normal mode, it corresponds to basic speaker systems which comprise front
speakers, rear speakers, and subwoofer. In such cases, the crossover can be used to apply the
HPF to the front and rear speakers and the LPF to the sub-woofer so that the sound from all
speakers merges properly. In addition to the 4 speaker system, in pro mode, the adjustments can be
made to suit speaker system where the front speaker, rear speaker and non-fader output can be
switched between Hi, Mid or Low output and the speakers can be combined according to each
range (treble range: tweeter, mid range: mid, bass range: woofer) to provide 3-way playback. In this
case, the crossover function can be used to adjust the playback ranges so that the HPF is applied to
the treble-range speakers, the HPF and LPF is applied to the Mid-range speakers, and the LPF is
applied to the bass-range speakers so that the sound from all speakers merges properly.
Bass range
(woofers)
20Hz
fc1(LPF) fc2(HPF)
Mid range (Front and rear speakers)
fc(LPF/HPF)
63-200Hz
176
Mid range
fc3(LPF)
Treble range
20kHz
fc4(HPF)
fc*: Cutoff frequency
20kHz