OT-4240/4480/4960 Output Transformer Unit OT 4960 OUTPUT TRANSFORMER UNIT
Contents Welcome Warning...............................................................................................................................1 Unpacking ............................................................................................................................2 Installation Environment..........................................................................................................................2 Important Safety Instructions ............................................
OUTPUT TRANSFORMER UNIT Welcome A personal welcome to you from the management and employees of Inter-M All of the co-workers here at Inter-M are dedicated to providing excellent products with inherently good value, and we are delighted you have purchased one of our products. We sincerely trust this product will provide years of satisfactory service, but if anything is not to your complete satisfaction, we will endeavor to make things right.
OUTPUT TRANSFORMER UNIT 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.
OUTPUT TRANSFORMER UNIT Features - BRING DISTRIBUTED AUDIO TO YOUR SYSTEM Transforms the 4Ω output of the Inter-M QD-4240/4480/4960 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-4240/4480/4960 units. Operation Make certain that speakers and input sources are properly connected before switching on.
OUTPUT TRANSFORMER UNIT Rear Panel 1. AMP INPUT TERMINALS These terminals are connected to the output of a low-impedance amplifier like the Inter-M OT-4240 (4Ω/60W), OT-4480 (4Ω/120W) or OT-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.
OUTPUT TRANSFORMER UNIT Applications QD-4960 OT-4960 OT-4240/4480/4960 5
OUTPUT TRANSFORMER UNIT Block Diagram (OT-4240/4480) 6 OT-4240/4480/4960
OUTPUT TRANSFORMER UNIT 70V(20.4 ohm) COM 4ohm 240W 100V(41.
OUTPUT TRANSFORMER UNIT Specifications .........................................................0dB=0.775Vrms - 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.
OUTPUT TRANSFORMER UNIT Service Procedures Ensure the problem is not related to operator error, or system devices that are external to this unit. Information provided in the troubleshooting portion of this manual may help with this process. Once it is certain that the problem is related to the product contact your warranty provider as described in the warranty section of this manual. Schematic A Schematic is available by contacting your warranty provider.
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).
