9
SETTING GAIN CONTROLS AND SUBSONIC FILTER
If you are using the Remote Gain Controller, make sure the remote gain control is
turned fully clockwise before starting the amplifier gain control setting. The gain control
on the amplifier chassis is provided for level matching purposes; it does not give the ampli-
fier any more power by turning it up - its purpose is to adjust the sensitivity of the ampli-
fier in relation to the output level provided by the source.
Start with the amp gain set to minimum by turning the control on the amp counter-
clockwise. Turn the source level up until distortion is barely audible - this will be at about
90-95% of full volume. Raise the amplifier gain until distortion is just audible. The gain is
now set correctly. Check the level with CD/tape and tuner to make sure the adjustment is
correct for all sources.
Your DX-series amplifier has a built-in subsonic filter which cuts all the ultra-low fre-
quency information and allows the amplifier to concentrate energy where it does the
most good- above 25Hz. The switch, accessible from the end panel, gives you the option
of having this filter engaged or disengaged. For best sound quality and extended frequen-
cy response leave the filter off (switch in the OUT position). If you are using this amplifier
with ported boxes, bandpass enclosures, or in a maximum SPL vehicle you will want to turn
the subsonic filter on (switch in the IN position).
