CHAPTER 8
Project K2 S9800 Switch Operations
See Fi g u re 8.
The K2 S9800 has 3 switches mounted
on the network panel on the rear of the
enclosure. The switches are covered by
an access plate which is easily removed
by unscrewing the 2 knurled mounting
screws. The access panel has holes in it
which line up with two of the adjust-
ment switches. This allows for trim-
ming of the system response without
removing the panel. Panel removal is
necessary to operate the Bi-Amp switch
and for installation/changing of the bat-
t e r y.
The Bi-Amp switch (center) should be
left in the Normal position except when
bi-amplification with an external elec-
tronic crossover is to be employed. T h e
necessary crossover slopes for the K 2
S 9 8 0 0 are very specific and Bi-Amping
the system should only be done using
factory approved electronics.
The LF Damping switch (left most)
serves two functions. Operating the
switch changes the "Q" of the LF
crossover as it transitions into the High
Frequency driver. High damping (H)
yields the flattest woofer response. T h i s
is the most clockwise position.
Medium damping (M) allows the
woofer response to rise by about 0.5 dB
over the range of 200 Hz to 600 Hz for
a somewhat "warmer" sound.
Low damping (L) causes the woofer
response to rise by an additional 0.5 dB
over the same range. The Damping
switch also controls the interaction
between the woofer and the driving
amplifier at low frequencies (approxi-
mately 30 Hz to 80 Hz) by changing
the reactive load presented to the
a m p l i f i e r. The High setting gives the
tightest damping with Medium and
Low each giving slightly less firmness.
The HF Level switch (right most)
adjusts the High Frequency level over
the range of approximately 1000 Hz to
10 kHz. Position "3" (most clockwise)
gives the highest HF output and mea-
sures the most level. Position "2"
reduces the HF level by 0.75 dB and
position "1" reduces the HF level by an
additional 0.75 dB.
Although the range of these controls is
rather small, each of them operate over
a reasonably wide frequency range and
thus have a noticeable affect on the
overall tonal balance of the system. It is
recommended that the system first be
played with the switches in the full
clockwise position ("H" & "3"). T h e s e
settings give the most uniform mea-
surements in a controlled environment.
Of course, we are interested in produc-
ing the most pleasing sound in your
environment with your choice of pro-
gram material. It is, therefore, recom-
mended that each of the controls be
tested in their various settings on a vari-
ety of program material. Once you
become familiar with their individual
c h a r a c t e r, you should have no diff i c u l t y
determining the settings which produce
the most pleasing, natural sound in
your room with your equipment.
18
Project K2 S9800
