JBL Professional loudspeakers SR-X Series - Manual (Page 9)

INPUT PANEL
Internal Network Mode Selector
All SR-X models are fitted with the internal network mode selector.
The ability to select the mode of operation provides the sound system user flexibility
in the system configuration, and also permits the system to be upgraded at a later
date. By simply removing the input panel and changing the position of a heavy duty
connector, the system can be configured as either a bi-amp or a passive system.
After replacing the input panel, the network position is indicated on the connector
plate panel. This provides a truly tamper resistant solution to avoid the horrors of a
mis-configuration.
In passive operation, a system can be operated with a minimum of only one
amplifier and no additional system controllers. In bi-amp operation, the system can
be operated for maximum transducer performance and will require the use of
additional amplifiers-and an electronic crossover (see "Crossovers and Controllers").
For Sub systems with more than one transducer, the same ability to select the mode
of operation is provided - but instead of bi-amp/passive selection, the input can be
configured for either parallel woofers (4 ohm) or individual transducer access
(2 x 8 ohm). This can be useful for assuring maximum power transfer from the
amplifier to the transducers.
Please Note: There are no passive network components in the circuit when the
Bi-amp mode is selected. (Except: SR4732X and SR4735X which retain a crossover
section between midrange and HF.)
Changing the Input Mode Connector
1. Remove 6 connector plate retaining screws and
remove the plate.
2. Turn plate over and locate the male connector.
3. Pull out connector and firmly place in socket of
desired system mode - you should be able to see
the yellow indicator in the desired mode window.
4. Replace plate and secure with 6 screws.
Please Note: For SR4715X - SR4719X, the connector is
split to permit discrete mode operation.
IN/OUT
±1 LF
IN/OUT
±2 NC
SR-X SERIES
Impedance: 8 Ω
Impedance: 16 Ω
±2 HF
±1 Full Range
BI-AMP
PASSIVE
Impedance: 8 Ω
JBL PROFESSIONAL
Northridge, CA USA Made in U.S.A
Serial No.
9
IN/OUT
±1 PASS-THRU
IN/OUT
±2 PASS-THRU
SR-X SERIES
Impedance: 4 Ω
±2 LF
±1 LF
Impedance: 4
Ω
JBL PROFESSIONAL
Northridge, CA USA Made in U.S.A
Serial No.
BOTH INDICATORS
DISCRETE MODE
±1 LF 8 Ω
±2 LF 8 Ω