17
HIGHPASS CROSSOVER FREQUENCY ADJUSTMENT
For satellite speakers, set the “XOVER” slide switch to its “HI” position and set the
FREQUENCY slide switch to one of its three possible positions.
Depending on the effective cone surface and the power handling of the installed
satellite speaker system, one of the three selectable crossover frequencies will give
you a good compromise between midbass performance and mechanical power
handling. The correct highpass crossover frequency must be played and determined
“by ear”. Note: If the highpass crossover frequency point for a given satellite system
is set too low, the speakers will be mechanically overdriven already at low playback
volume.
LOWPASS CROSSOVER FREQUENCY ADJUSTMENT
Set the “XOVER” switch to its “LOW” position, when you intend to drive a subwoofer
system with this channel pair.
The LOW PASS cut-off frequency point must be played by ear as well, i.e. since
the lowpass crossover frequency point and the resulting sound in the upper bass
range is mostly a matter of personal taste. In general, setting the lowpass crossover
frequency point too low, will result in a weak and “muddy” sounding bass, while
setting the lowpass crossover frequency too high, will result in a ‘booming’ bass
sound and the impression of a reduced low end extension.
INPUT GAIN CONTROL ADJUSTMENT
Before you start to adjust the input gain, you MUST set
all tone controls
(Bass,
Mid, Treble, Loudness etc.) and the fader of your head unit to the
neutral or center
positions
.
Now turn all input gain potentiometers of the installed amplifiers counter-clockwise
to the minimum positions and ALWAYS start with the channel pair, that drives the
subwoofer system.
SUBWOOFER CHANNEL
Turn up the volume control of your head-unit, to approximately ¾ of full volume,
while playing a dynamic piece of music preferrably from a CD. Slowly increase the
input gain of the amp channels that drive your subwoofer, by turning the GAIN pot
clockwise, until you can just about hear distorted sounds from your subwoofer.
Reduce the main volume level on your head-unit to a normal listening level and
continue the adjustment of further channels by increasing the input gain of the
corresponding potentiometer. See also the section “Satellite Channels” below.
SATELLITE CHANNELS
Slowly increase the input gain control of the remaining channel pair, for example the
section that drives the satellite system, by turning the GAIN potentiometer clockwise
until you reach a good tonal balance, with a slight emphasis remaining in the bass
frequency range. Now continue to turn up the input gain control of the remaining
channel pair(s) – until all channels play in a coherent and balanced way.
SPA250-2100Z Manual.indd 17
02.06.2004 9:49:09 Uhr