K2S5800 (serv.man2) - JBL Audio User Guide / Operation Manual. Page 16

16

The bi-wire connection method 
requires one amplifier and two
sets of speaker wires. By removing
the shorting bars, connections may
be made to the individual network
sections using four conductors,
one for each of the four terminals
(see Figures 10, 12 and 13).

The optimal method of powering
the Project K2 system is with 
two amplifiers, one for the low-
frequency and one for the high-
frequency unit, and a crossover
network. Since each amplifier
drives only one speaker, this
method allows the user to select
amplifiers with the desired sonic
character for low and high fre-
quencies (see Figures 10, 12 
and 13).

Four identical amplifiers (or two
dual channel units) may be used,
although specialized low- and
high-frequency amplifiers offer
clear advantages. The Project K2
specialist dealer can recommend
the amplification that will 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 amplifier for each
section is equal, or that input level
controls are provided to maintain
the proper low-to-mid/high bal-
ance. If two identical stereo ampli-
fiers are used, one may be 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-
frequency sections. Some ampli-
fiers invert polarity. If the polarity is
reversed to one section, a discon-
tinuity in response will be apparent
in the crossover region. If a prob-
lem is suspected, reverse the
polarity to either low- or high- 
frequency sections of both 
loudspeakers. Amplifier polarity
markings may not ensure correct
polarity connections.

The grilles on the Project K2 S5800
loudspeaker system have been
designed for maximum acoustical
transparency. For the most critical
listening, however, JBL suggests
removing the grilles. The grilles are
connected 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, posi-
tion 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 electronics.

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

• Make sure the controls on the
crossover panel are correctly set.

The system is now ready for use.
The Project K2 S5800 speaker 
system is fully functional as soon
as it is set up. The amplifier power
should not exceed 300 watts (RMS).
There may be some subtle tonal
changes in bass output over the
first week to 10 days of operation.
These are caused as the move-
ment of the low-frequency drivers
becomes more fluid and the parts
settle in. This process is completely
normal with transducers of 
this caliber.

Figure 12. Connecting speaker wires
using banana plugs.
(Bi-Wire or Bi-Amp Connection Method)

Figure 13. Connecting speaker wires
using bare-wire method.