OT-4240/OT-4480/OT-4960
Output Transformer Unit
Copyright 2004 Inter-M Corporation
OT-4240/OT-4480/OT-4960 Output Transformer Unit
Contents
Welcome ..................................................................................................................................... 3
Unpacking ............................................................................................................................... 3
Warnings .................................................................................................................................. 3
Operation................................................................................................................................. 5
Output Transformer Unit .......................................................................................................... 6
Features ....................................................................................................................................... 6
Rear Panel Controls .................................................................................................................... 7
Connections................................................................................................................................ 8
Block Diagram (OT-4960)........................................................................................................... 9
Block Diagram (OT-4240 / OT-4480) ....................................................................................... 10
Specifications............................................................................................................................ 11
2
OT-4240/OT-4480/OT-4960 Output Transformer Unit
Welcome
A personal welcome to you from the management and employees of Inter-M
Thank you for purchasing this fine Inter-M product. All of us here at Inter-M are dedicated
to providing you with the highest quality products and the best value.
We sincerely trust this product will provide you with years of satisfactory service, but if
anything is not to your complete satisfaction, we will endeavor to make things right.
Welcome to Inter-M, and thank you for becoming a part of our worldwide extended
family!
Unpacking
Although this unit is neither complicated nor difficult to operate, we recommend you
take a few minutes to read this brief manual and familiarize yourself with the important
information regarding product features, setup and operation.
As with most electronic devices, we strongly recommend you retain the original
packaging. In the unlikely event the product must be returned for servicing, the original
packaging (or reasonable equivalent) is required.
Warnings
Environment
Never place this product in an environment that could alter its performance or reduce its
service life. Such environments are usually characterized by high levels of heat, dust,
moisture, or vibration.
Safety
1. Read these instructions carefully.
2. Follow all instructions.
3. Keep all warnings.
4. Do not operate this apparatus near water.
5. Clean only with a damp cloth.
6. Do not block any of the ventilation openings.
7. Install only in accordance with the instructions in this manual.
3
OT-4240/OT-4480/OT-4960 Output Transformer Unit
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other
devices (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding type plug. A polarized
plug has two blades, with one wider than the other. A grounding type plug has two
blades and a third grounding prong. The wide blade or the third prong is provided for
your safety. If the provided plug does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where it is attached to the apparatus.
11. Use only the attachments/accessories specified.
12. Use only with a cart, stand, tripod, bracket, or table specified, or sold with the
apparatus. When a cart is used, use caution when moving the cart/apparatus
combination to avoid overturning.
13. Unplug this apparatus during lightning storms or when unused for long periods of
time.
14. Refer all servicing to qualified service personnel. Servicing is required when the
apparatus has been damaged in any way, such as power supply cord or plug is
damaged, liquid has been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not operate normally, or
has been dropped.
4
OT-4240/OT-4480/OT-4960 Output Transformer Unit
Operation
Make certain that speakers and input sources are properly connected before switching
on.
Keep volume levels at minimum gain before switching on.
5
OT-4240/OT-4480/OT-4960 Output Transformer Unit
OT-4240/OT-4480/OT-4960
Output Transformer Unit
Features
Bring Distributed Audio to Your System
• Transforms the 4Ω output of the Inter-M QD-4240/QD-4480/QD-4960 to a 70V or 100V
output level for use with high-impedance speaker systems.
Flexible Operation
• Four independent channels allow for four mono or two stereo zones.
Expandable and Adaptable
• Line Out expansion port for additional OT-4240/OT-4480/OT-4960 units.
6
OT-4240/OT-4480/OT-4960 Output Transformer Unit
Rear Panel Controls
1. Amp Input Terminals
These terminals are connected to the output of a low-impedance amplifier like
the Inter-M QD-4240 (4Ω/60W), QD-4480 (4Ω/120W) or QD-4960 (4Ω/240W).
2. Speaker Output Terminals
These output terminals may be connected with high-impedance distributed
speaker systems.
For 120VAC operation, the 70V output terminal is recommended. For 230VAC
operation, the 100V or 70V terminals may be used.
The chart below shows recommended impedances.
100V 70V 25V
OT-4240 / 120VAC 81.7Ω 10.4Ω
OT-4240 / 230VAC 166.7Ω 81.7Ω
OT-4480 / 120VAC 40.8Ω 5.2Ω
OT-4480 / 230VAC 83.8Ω 40.8Ω
OT-4960 / 120VAC 20.4Ω
OT-4960 / 230VAC 41.6Ω 20.4Ω
7
OT-4240/OT-4480/OT-4960 Output Transformer Unit
Connections
8
OT-4240/OT-4480/OT-4960 Output Transformer Unit
Block Diagram (OT-4960)
9
OT-4240/OT-4480/OT-4960 Output Transformer Unit
Block Diagram (OT-4240 / OT-4480)
10
OT-4240/OT-4480/OT-4960 Output Transformer Unit
Specifications
ELECTRICAL
Rated Output
OT-4240 25V(10.4Ω), 70V(81.7Ω), 100V(166.7Ω)
OT-4480 25V(5.2Ω), 70V(40.8Ω), 100V(83.3Ω)
OT-4960 70V(20.4Ω), 100V(41.6Ω)
Input
OT-4240 4Ω/60W
OT-4480 4Ω/120W
OT-4960 4Ω/240W
Frequency Response 20Hz-20kHz
GENERAL
Weight
OT-4240 11.5kg / 25.3 lb.
OT-4480 14.5kg / 32 lb.
OT-4960 21.5kg / 47.4 lb.
Dimensions
OT-4240/OT-4480 482(W) x 88(H) x 310(D) mm
19(W) x 3.5(H) x 12.2 (D) in
OT-4960 482(W) x 132(H) x 310(D) mm
19(W) x 5.2(H) x 11(D) in
Specifications and design subject to change without notice for improvements.
11
OT-4240/OT-4480/OT-4960 Output Transformer Unit
Inter-M, Ltd. (Korea) began operations in 1983.
Since then, Inter-M has grown to become one of the largest manufacturers
of professional audio and commercial sound electronics equipment in the world.
Inter-M has gained worldwide recognition for its own branded products,
as well as private label manufacturing of electronics sold under other names (OEM).
The company is no longer just a Korean company, but rather a global company
that is truly international in scope, with factories and offices in Korea and China,
and sales and marketing operations located in Japan, Europe, and the U.S.A.
With more than 850 employees around the globe, Inter-M is well-poised for further growth and
expansion.
INTER-M AMERICAS, INC.
1 EAST BEACON LIGHT LANE, CHESTER, PA, USA 19013-4409
TEL: (610) 874-8870, FAX: (610) 874-8890
Home Page:http://www.inter-m.net, E-mail: service@inter-m.net
INTER-M Corporation
SEOUL OFFICE: 653-5 BANGHAK-DONG, DOBONG-KU, SEOUL, KOREA
TEL: 82-2-2289-8140~8, FAX: 82-2-2289-8149
Home Page:http://www.inter-m.com, E-mail: export@inter-m.com
0704OT424044804960 PRINTED IN KOREA
12
Loading...