JBL Synthesis K2 S9900 - Manual (Page 34)

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I. Passive Connection Method
The passive method requires one amplifier and one set of wires. Connections are
made to either the upper terminals or the lower terminals. Do not remove the
shorting straps.
II. Bi-Wire Connection Method
The bi-wire connection method requires one amplifier and two sets of speaker
wires. By removing the shorting straps, connections may be made to the
individual network sections using four connectors, high-frequency wires to the
upper terminals and low-frequency wires to the lower terminals.
III. Active Bi-Wire Connection Method
This connection method uses two amplifier channels and two sets of speaker
wires. Each amplifier input is fed from the same preamplifier output. In this
case, the shorting straps must be removed and separate speaker cables are run
from each amplifier channel, one to the high-frequency posts and the other to the
low-frequency posts.
IV. Bi-Amp Connection Method
The bi-amp connection method requires two amplifiers, one for the low-frequency
unit and one for the high-frequency unit, and an external electronic crossover
network. By removing the shorting straps, connections may be made in the
following way. Wires from the high-frequency amplifier are connected to the
upper terminals, and wires from the low-frequency amplifiers are connected to
the lower terminals. The bi-amp switch must be set to the bi-amp position to
disable the internal crossover function. Internal level adjustment and high-
frequency equalization circuitry remain active.
The amplifiers are fed from the output of an electronic crossover unit (not
included). This crossover must be configured to produce the electrical drive
illustrated in Figure 8. These curves are very unusual and will be difficult for a
commercially available crossover unit to properly emulate. It is for this reason
that bi-amplification of the K2 S9900 is not recommended.