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InterM OT-4480


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Product Overview

4 x 120W Output Transformer

The OT-4480 is a 120 watt high impedance transformer. It provides a professional way to install transformers in an equipment rack. The unit transforms the 4Ω output of any power amplifier to a 70V or 100V level for use with high impedance speakers (distributed systems).



  • 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


  • Rated Output: 25V(5.2Ω), 70V(40.8Ω), 100V(83.3Ω)
  • Input: 4Ω/120W
  • Frequency Response: 20Hz~20kHz
  • Weight: 14.5kg/32lb
  • Dimensions: 482(W) x 88(H) x 310(D) mm / 19(W) x 3.5(H) x 12.2(D) in


* Specifications and design subject to change without notice.

Product Downloads

  • OT-4480 ED DWG DWG 0.1 MB
  • OT-4480 User Manual PDF 0.3 MB
  • OT-4480 DWG DWG 0.1 MB


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*Prices are in AUD, include GST and are subject to change. Please call National Audio for pricing and availability on the OT-4480.