K2S9800 - JBL Audio User Guide / Operation Manual. Page 25

Four identical amplifiers (or two dual
channel units) may be used, although
specialized low and high frequency
amplifiers offer clear advantages. T h e
P roject K2 specialist dealer can recom-
mend the amplification that will best
suit individual needs.

In all cases, the left and right amplifi-
ers for each section must be identical.
Make sure that the input sensitivity of
the amplifier for each section is equal,
or that input level controls are provided
to maintain the proper low-to-mid/high
balance. If two identical stereo ampli-
fiers are used, one may he located near
each loudspeaker and drive low and
high frequency sections through short
wire runs.

NOTE: Input polarity must be the
same for both the low and high fre-
quency sections. Some amplifiers
invert polarity. If the polarity is
reversed to one section, a discontinuity
in response will be apparent in the
crossover region. If a problem is sus-
pected, reverse the polarity to either
low or high frequency sections of both
loudspeakers. Amplifier polarity mark-
ings may not ensure correct polarity
c o n n e c t i o n s .

The grilles on the P roject K2 S9800
loudspeaker system have been
designed for maximum acoustical

t r a n s p a r e n c y. For the most critical lis-
tening, however, JBLsuggests remov-
ing the grilles. The grilles are connect-
ed by four pins inserted into four holes
on the face of the cabinet.

To remove each grille, hold the grille
edges with your fingers and gently pull
the grille away. Do not use any tools to
pry the grille off; this will damage the
finish of the cabinet. To replace the
grille, position the mounting pins over
the holes and gently press until the
grille meets the enclosure.

Project K2 Final Checklist

- Connect and plug in all other system
e l e c t r o n i c s .

- Check all connections. If bi-amping
or bi-wiring, make sure both shorting
straps are removed.

- Make sure three controls on the
crossover panel are correctly set.

The system is now ready for use. T h e
P roject K2 S9800 speaker system is
fully functional as soon as it is set up.
There are no restrictions on the amount
of amplification that may he applied.
There may be some subtle tonal
changes in bass output over the first
week to 10 days of operation. T h e s e
are caused as the movement of the low
frequency drivers becomes more fluid
and the parts settle in. This process is
completely normal and natural with
transducers of this caliber.

25

K2 manual v11 approved  12/4/01 12:10 PM  Page 25