Manual

I N T R O D U C T I O N
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F E A T U R E
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S P E C IF I C AT I O N S
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POWER OUT SELECT
RMS 250W
70V 100V
(20Ω) (40Ω)
COM
100V-70V / OUT
SIGNAL IN
STEREO / OUT
70V/100 Line Matching Transformer
M T R -2 5 0
The MTR-250 70V/100V Line Matching Transformer Combiner enables the conversion from an 8 Ohm
amplier output to a 70V/100V. This unit is ideal for both professional stage or PA applications which
require running multiple pairs of speakers to a single amplier.
Rugged 1U Metal Chassis
Internal Constant Voltage Transformers
Extensive Short Circuit & Overload Protection
Signal In LED Indicator
70V/100V Mono Power Output, RMS 250W
Frequency (-1dB): 20Hz-20kHz
Stereo Output 85W Per Channel Into 8 Ohm Loads
Signal In LED Indicator.
Stereo Out LED Indicator.
70V/100V Out LED Indicator
70V/100V Mono Speaker Output.
Power Out Select. Left = 8 Ohm Output. Right = 70V/100V Output.
8 Ohm Stereo Speaker Output.
AMP Stereo In. Maximum Capacity 85W per channel at 8 Ohm. For bridge connection, connect amplier’s
“+” to the “L+” screw terminal connector and connect “-“ to the “R+” screw terminal connector. Maximum
power handling for bridge connection is 250W.
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POWER OUT SELECT
RMS 500W
70V 100V
(10Ω) (20Ω)
COM
BRIDGE
RMS 8Ω
170W 170W
500W
L
-
R
+
-
R
POWER IN
L
+
RMS 8Ω 170W × 2
L
+
L
-
R
+
-
R
POWER OUT SELECT
RMS 500W
70V 100V
(10Ω) (20Ω)
COM
BRIDGE
RMS 8Ω
170W 170W
500W
L
-
R
+
-
R
POWER IN
L
+
RMS 8Ω 170W × 2
L
+
L
-
R
+
-
R
85W 8OHM SPEAKES X 2
170W 8 OH M 500W 8 OH M170W 8 OH M
RM 5 C H AMP
7 0 0 0 P E A K E R S
2 5 0 W
170W 8 OH M 500W 8 OH M170W 8 OH M
R M 5 C H AMP
Constant-voltage output mode, connect the amplier in bridge mode, put the “POWER OUT SELECT” to
the right, then connect 70V/100V in wall/ in ceiling speakers to the “70V/100V MONO OUTPUT” in series,
the total power of speaker should be below 250W
Fixed resistance output mode, connect the amplier in stereo mode, put the “POWER OUT
SELECT” to the left, connect 2 8ohm speakers to the “8 Ohm Stereo Output” as above.
OSD Audio • 775 Columbia St • Brea • CA • 92821 • www.osdaudio.com • Tel [phone] • Fax [phone]
S
MTR-250 USER MANUAL
70V/100V Line Matching Transformer Combiner
BRIDGE
RMS 8Ω
85W 85W
250W
L
-
R
+
-
R
POWER IN
L
+
RMS 8Ω 85W
×
2
L
+
L
-
R
+
-
R