User Manual

11
8. CHANGING TO HIGH IMPEDANCE
The speakers can be used for high-impedance applications with the installation of the optional MT-S0301
Matching Transformer.
Even after the matching transformer has been installed, the removable input connector is used in the same
manner as for low impedance operation.
To install the MT-S0301 transformer, remove the blank panel located on the speaker's rear surface.
Primary side impedance High impedance 100 V line High impedance 70 V line
170 Ω 30 W
330 Ω 30 W 15 W
1 kΩ 10 W 5 W
Unusable
The following table shows the usable impedance.
[Speaker's rear panel]
Input terminal
Blank panel
Notes
• To remove the blank panel, remove the 4 screws indicated by
arrows.
• For details regarding mounting procedures and tap
(impedance) change, refer to the instruction manual enclosed
with the MT-S0301.
• The diagram below is an internal wiring when the matching
transformer is installed.
OUT
+
IN
+
Matching transformer MT-S0301
1 kΩ 8 Ω
0
330 Ω
170 Ω
COM
OUT
-
OUT
+
OUT
-
OUT
+
OUT
-
OUT
+
OUT
-
IN
-
IN
+
IN
-
PCB
Input terminal