K2S9800 - JBL Audio User Guide / Operation Manual. Page 14

No single type of amplifier is specified
for use with the P roject K2 S9800 s y s-
tem. The speakers are highly eff i c i e n t
and will operate adequately with an
amplifier or receiver of 70-100 watts.

H o w e v e r, the transient response and
audio definition of a high-end system
such as P roject K2 S9800 will pick up
all inefficiencies and distortion in an
amplifier system. For full-range opera-
tion, the P roject K2 S9800 s y s t e m
should not be used with an
amplifier/receiver of less than 100
watts. Amplifiers/receivers of 100-500
watts will ensure optimum system per-
f o r m a n c e .

There is no effective limit to the power
handling capabilities of the P roject K2
S9800 loudspeakers when driven by
consumer audio amplifiers. No damage
will occur when used with high pow-
ered components. Source impedance is
an important criteria in selecting an
appropriate unit; the selected amplifi-
er(s) should have a very high current
capacity and must be capable of driving
a low-impedance load.

For bi-wiring or bi-amplification appli-
cations, four identical amplifiers or two
dual-channel units may be used,
although specialized low frequency and
high frequency amplifiers offer clear
advantages. (If four amplifier channels
are used, the high frequency amplifier
may be up to 6 dB less powerful than
the low frequency amplifier. Due to the

power versus frequency distribution of
the music, the low frequency section
requires approximately four times the
power of the high frequency section.)

P roject K2 S9800 specialist dealers can
recommend amplification to best suit
individual needs. In all cases, the left
and right amplifiers for each section
must be identical. Make sure that the
input sensitivity of the two amplifiers is
equal or that input level controls are
provided to maintain the proper low to
mid/high balance. If two identical
stereo amplifiers are chosen, each
amplifier may be located near a loud-
speaker and drive low frequency and
high frequency sections through short
wire runs.

The addition of a crossover network
such as the JBLDX1 Electronic
Crossover will allow the direct connec-
tion of the low and high frequency
components of the P roject K2 s y s t e m
to frequency dedicated amplifiers, and
is required if the system is to be bi-
amplified. The DX1 crossover is
specifically matched to the response
characteristics of P roject K2 S9800
and will ensure optimum performance.
The DX1 may be purchased from
P roject K2 S9800 specialist dealers.

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K2 manual v11 approved  12/4/01 12:10 PM  Page 14