JBL S4800 manual Shorting Straps, Amplifier Connections, Wiring Configurations

SHORTING STRAPS

The S4800 is shipped with shorting straps installed between its low- frequency and high-frequency terminals. Please see Figure 8.

To prepare the S4800 for bi-wire operation, these straps must be removed by completely unscrewing each binding-post knob, removing the straps, and replacing the knob. Speaker wires can then be con- nected to each set of terminals (see Figure 9).

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Figure 9. Removing shorting straps.

(Bi-Wire Connection Method)

AMPLIFIER

CONNECTIONS

IMPORTANT: Turn all amplifiers off before connecting or disconnect- ing S4800 loudspeakers. Making connections while an amplifier is operating could seriously damage the loudspeaker system and void the warranty. All amplifiers must also be turned off before connect- ing or disconnecting cables at the amplifier or preamplifier inputs.

All connections between the amp- lifier(s) and the S4800 loudspeaker system are made at the terminals located on the back of the enclo- sure (see Figures 9 through 12).

The left-hand terminals (black stripe) are negative, and the right- hand terminals (red stripe) are positive. These correspond to the negative and positive conductors in the speaker wire. Each speaker wire contains two conductors, one of which will have a stripe, color markings or a ridge. Assign one of the two conductors as the nega- tive conductor and the other as the positive conductor. Use these same designations for all system wiring. Always connect the con- ductors of the speaker wire appro- priately to the corresponding neg- ative and positive terminals on all system components. This will ensure that all components will work together (“in phase”). Con- necting the speakers out of phase will not damage them but will result in reduced low-frequency output and impaired stereo effect.

Speaker wires may be fastened to the terminals by several methods. The most positive connection is made by directly connecting clean, bare connectors (exposed by strip- ping the ends of the wire) to the terminal posts.

For this type of connection, loosen the knobs on the terminals and insert the exposed (bare) ends of each speaker wire into the hole exposed on the terminal shaft

( + to +, – to – ) (see Figure 12). Refasten the knob on each termi- nal so that a snug connection is achieved. Do not apply excessive force and do not overtighten. To avoid a short circuit, trim off any excess wire that is not in contact with the binding post contact surfaces.

S4800 terminals are also designed to accept spade or banana-type connectors, which are fastened to the ends of the wires and, in turn, are attached to the terminal posts.

WIRING

CONFIGURATIONS

As mentioned earlier, the S4800 speakers may be connected to the amplifier(s) by one of these meth- ods: passive or bi-wire. Each method (described on page 13) has its own advantages, and the loudspeaker system will deliver superb performance with both methods.

Each speaker is shipped with external shorting straps in place (see Figure 8), connecting the upper and lower terminal posts on the left and right sides. These straps must remain in place for passive connections but must be removed for all bi-wire connec- tions.

IMPORTANT: If the amplifiers are connected to the S4800 loudspeak- ers in the bi-wire mode with the shorting straps still on, the amplifi- er outputs will be shorted, which could result in costly amplifier damage when the power is switched on.

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