Toa SR-PP4 - Manual (Page 9)

9
8. CHANGING TO HIGH IMPEDANCE
The SR-S4 series speakers can be used for high-impedance applications with the installation of the optional
MT-S0601 Matching Transformer.
To install the MT-S0601 transformer, remove the blank panel
located on the speaker's rear panel.
For details regarding mounting procedures, refer to the
instruction manual enclosed with the MT-S0601.
Note
The speaker cannot be used in combination with the matching
transformer when driven by a bi-amplifier.
To change the tap, refer to the instruction manual enclosed with the MT-S0601.
The diagram below is an internal wiring when the matching transformer is installed.
INPUT Pin Pin 1+ 1- THROUGH Pin Pin 2+ 2-
LINE ARRAY SPEAKER Corporation
IMPEDANCE
PA RALLEL
8 Ω CONT. PGM. INPUT 360W
PA RALLEL
TOA
Blank panel
(Remove the 4 screws
indicated by arrows.)
SR-S4L/S4S
Rear panel
Primary side impedance High impedance 100 V line High impedance 70 V line
83 Ω Unusable 60 W
170 Ω 60 W 30 W
330 Ω 30 W 15 W
670 Ω 15 W 7.5 W
Matching transformer
MT-S0601
INPUT +
INPUT –
THROUGH
THROUGH
2+ 2+
1+ 1+
2– 1– 2– 1–
Neutrik NL4MP connectors
Input terminal panel
Screw
terminals
Passive
network
x 4
x 4
Tweeters
Woofers