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Setting up your AVC 1800
Bass Management
Bass management is designed to assure overall balanced response by accommodating many
different types of speaker systems that may or may not be able to reproduce frequencies
below 80 Hz. The Bass Management setup menu lets you configure your speakers to reproduce
low frequencies below 80 Hz, or to filter out these frequencies and route them to your front
speakers or only to your subwoofer channels. The AVC-1800 has four toggle switches that
you must set according to the characteristics of your speakers.
To Setup Bass Management for Your Front Left and Right Speakers:
1. Refer to the owner’s manual of your front left and right loudspeakers to determine whether
they are designed to reproduce low frequencies below 80 Hz.
2. If the main (Left and Right) speakers were designed to handle frequencies below 80
Hz, set the switch to Large. The front left and right speakers will then operate full
range (20 Hz to 20 kHz).
3. If they were not designed for low frequencies, select
Small. The front left and right
speakers will then have low frequencies rolled off at 12 dB per octave starting at 80 Hz.
This filtered low frequency information is then re-routed to the subwoofer channel.
To Setup Bass Management for Your Center Speaker:
1. Refer to the owner’s manual of your center loudspeaker to determine whether it is designed
to reproduce low frequencies below 80 Hz.
2. If the center speaker is designed to safely reproduce frequencies below 80 Hz, select
Large. The center speaker will then operate full range (20 Hz to 20 kHz).
3. If it is not designed for low frequencies, select Small
.
The center speaker will then have
low frequencies rolled off at 12 dB per octave starting at 80 Hz. This filtered low frequency
information is then re-routed to the subwoofer channel.
4. If you do not have a center channel speaker, select N
ONE
and the AVC-1800 sends center
channel information into the left and right speakers to create a phantom center image.
To Setup Bass Management for your Surround Speakers:
1. Refer to the owner’s manual of your surround loudspeakers to determine whether they
are designed to reproduce low frequencies below 80 Hz.
2. If they are designed to safely reproduce frequencies below 80 Hz, select Large. The
surround speakers will then operate full range (20 Hz to 20 kHz).
3. If the surround speakers are not designed for low frequencies, select Small
.
The surround
speakers will have low frequencies rolled off at 12 dB per octave starting at 80 Hz. This
filtered low frequency information is then re-routed to the subwoofer channel.
To Setup Bass Management for Your Subwoofer:
1. Select LPF (Low Pass Filter) if you are using a subwoofer to activate the built in electronic
lowpass filter at 12 dB per octave at 80 Hz. For this setting, make sure the passive low
pass crossover in your powered sub is defeated, since the electronic crossover in the
AVC-1800 is likely to be more accurate. If your subwoofer has no switch to bypass or
defeat its crossover, set it to its highest crossover frequency to minimize "double filtering"
2. Select Off if you are not using a subwoofer. Low frequency effects (LFE) are then evenly
distributed to the Main, Center, and Surround speakers depending on their bass
management settings.
3. Select 300 Hz if you want to use the low pass filter built into your powered subwoofer.
This setting effectively shifts the AVC-1800’s low pass filter up, thereby minimizing
“double filtering”.