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Outdoor 8-ohm to 70-volt transformer

Item # 452EW70V

This burial-rated outdoor transformer lets you convert an 8-ohm speaker for use in a 70-volt distributed audio system.

This burial-rated outdoor transformer lets you convert an 8-ohm speaker for use in a 70-volt distributed audio system.


Item # 452EW70V

In stock
$29.99 each

About the OSD EW70V

Add versatility to your outdoor speaker system

The OSD EW70V lets you convert standard in-ceiling or in-wall speakers for use in a 70-volt distributed audio system. It features an external burial-rated transformer switch with 2.5, 5, 10, 15 and 20-watt taps. The enclosure is impact-resistant ABS with clearly-marked tap settings.

Product highlights:

  • lets you convert a standard 8-ohm speaker for use in a 70-volt distributed audio system
  • selector for choosing 2.5, 5, 10, 15, and 20-watt taps
  • impact-resistant ABS enclosure
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # OSD-EW70V

What's in the box:

  • One waterproof 70V transformer with installed input & output cable seals

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Crutchfield response

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More details on the OSD EW70V

Stacey B.

Product Research


Overview: The OSD-EW70V is a waterproof external 70V transformer that lets you connect "standard" 8-ohm speakers into a commercial 70V audio system. Housed in a heavy-duty ABS waterproof enclosure, the OSD-EW70V is designed for direct-burial installations.

Wire Connections: Input and output speaker wire connections are made with set-screws into brass posts, accommodating speaker wire up to 12-gauge in size. Both connections are protected with ABS cable seals for a snug, watertight connection.

70V Taps: The OSD-EW70V features a built-in 20W transformer. Tap settings can easily be adjusted from the top-mounted tap dial, using a flat-blade screwdriver. Available taps include: 2.5W, 5W, 10W, 15W, 20W, and an 8-ohm bypass selection.

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