McLelland MTR-500 User manual

INTRODUCTION:
The MTR-500 70V/100V Line Matching Transformer is taking from
the 8 Ohm amplifier output, converting it to a 70V/100V line. Which
can be used for both professional stage or P.A warehouses
installations system application, such as department store, hotels,
schools, offices, stations or anything that requires a large amount
for speaker to be ran off the same amplifier.
FEATURE:
* Housed in a rugger 1U metal chasiss
* Internally Mounted Constant Voltage Transformers
* Extensive short circuit& over current protection
* Signal In LED signal indicator
* Stereo/ Out, 70V/ 100V Out LED signal indicator
* 8 Ohm out, 70V/100V out switchable
* Left and right amplifier screw terminal input connecter
* Left and right 8 Ohm screw terminal output connecter
* Left and right 70V/100V screw terminal output connecter
SPECIFICATIONS:
* 70V/100V mono power output, RMS 500W
* FREQ(-1db): 20Hz-20KHz
* Stereo output 170W per channel into 8 Ohm loads
MTR-500 USER MANUAL
70 V/1 00 V Li n e Matc hi n g Tran sf o rm er C o mb in er
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456
PANEL FEATURES AND OPERATION
1. Signal In LED Indicator: It allows to indicate if the signal input to
the unit.
2. Stereo / Out LED Indicator: It allows to indicate if the fixed resista-
nce stereo signal output from unit.
3. 70V/100V Out LED Indicator: It allows to indicate if the 70V/100V
mono signal output from unit.
4.70V/100V Mono Output: Connect to the 70V/100V constant-
voltage speakers, the output signal will be keep the constant and
higher voltage to send further then the fixed resistance output mode,
note that all the speakers connected to the unit which totally power
should be less than the RMS power 500W.
5. Power out select: To switch the output mode, turn left means the s-
ignal out from the 8 Ohm Stereo output located to the left of the sele-
ctor, turn right means the signal will out from the 70V/100V output
located to the right of the selector. Only one output mode is workable
at the same time.
6. 8 Ohm Stereo Output: The fixed resistance signal output from
there, we can connect two speakers with 170W into 8 Ohm, Indicatd
by the Stereo / Out LED.
7. AMP Stereo In: These screw terminal connecters are connect to
the amplifier’s output, the signal with power up to 170W into 8 Ohm
per channel can be handling. For bridge connection, please connect
the amplifier’s “+” to the “L+” screw terminal connecter; connect the
“-” to the “R+”screw terminal connecter, the bridge power handling
up to 500W.Indicatd by the signal LED.
7
POWER OUT SELECT
70V 100V
(10Ω) (20Ω)
BRID GE
RMS 8Ω
L-R+- RL+
170W 17 0W 500W
POWER IN
COM
RMS 5 00W
100V-70V / OUT
SIG NAL IN STEREO / OUT
70V/100 Line Matching Transformer
MTR-500
M c L E L L A N D
L+L-R+
-
R
RMS 8Ω 1 70W 2 ×

RMS 170W 2CH AMP
70V / 100V SPEAKERS
500W
RMS 170W 2CH AMP
*Constant-voltage output mode, connect the amplifier 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 totally power of speaker should be below 500W.
*Fixed resistance output mode, connect the amplifier in stereo mode,put the “POWER OUT SELECT” to the left, connect 2 8 ohm speakers
to the “8 Ohm Stereo Output” as above.
CONNECTION DIAGRAM
POWER OUT SELECT
RMS 5 00W
70V 100V
(10Ω) (20Ω)
COM
BRID GE
RMS 8Ω
170W 17 0W 500W
L-R+- R
POWER IN
L+
MTR-500 USER MANUAL
70 V/1 00 V Li n e Matc hi n g Tran sf o rm er C o mb in er
170W 8OHM SPEAKES X 2
POWER OUT SELECT
RMS 5 00W
70V 100V
(10Ω) (20Ω)
COM
BRID GE
RMS 8Ω
170W 17 0W 500W
L-R+- R
POWER IN
L+
170W 8 OHM 500W 8 OHM170W 8 OHM
170W 8 OHM 500W 8 OHM170W 8 OHM
M c L E L L A N D
RMS 8Ω 1 70W×2
L+L-R+
-
R
RMS 8Ω 170W×2
L+L-R+
-
R