JBL S3900 Owner's Manual page 6

Connection
Connection
6
To bi-wire the S3900, first remove the connector jumper bars as shown in the illustration.
If you're bi-wiring with a single stereo power amplifier, connect the speakers according to the following illustration.
HF/UHF
Connection
LF Connection
Right
Speaker
If you're bi-amping or bi-wiring with two stereo power amplifiers, connect the speakers according to the following
illustration.
HF/UHF
LF
Right
Speaker
In either case, follow the instructions for the different connector types in Basic Single-Wire Connection, on page 4.
NOTE: For more information about various speaker-wire and connection options, contact your local JBL dealer.
A. Unscrew
Amplifier
Right Left
Ch. Ch.
Amplifier 1
Right Left
Right
Ch. Ch.
Ch.
Amplifier 2
all four caps
B. Remove
jumpers
HF/UHF
Connection
LF Connection
Left
Speaker
Left
Ch.
Left
Speaker
HF/UHF
Connection
LF
Connection