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Small black rectangular transformer with metal mounting tabs and wire leads

Electro-Voice

Electro-Voice 15732 32W speaker transformer

SKU CH-09CZ-A09AD

A 32W speaker transformer for 25/70.7V lines with .5dB insertion loss and 50Hz-15kHz response

  • Wide frequency response ensures detailed sound from 50Hz to 15kHz
  • Low .5dB insertion loss preserves signal clarity in pro installations
  • Multiple power taps at 4.0, 8.0, 16.0 and 32.0 watts match diverse requirements
  • Compatible with 25V and 70.7V constant-voltage lines for flexible system design
  • Electrically isolated windings reduce interference for balanced signal integrity

32W transformer for distributed audio

The Electro-Voice 15732 is a 32W speaker transformer built for 25V and 70.7V constant-voltage lines. It matches loudspeaker impedance to the transmission line for efficient power transfer over long cable runs. Installers working on commercial background-music or paging systems use it to drive 8-ohm loads from high-impedance amplifier outputs.

Simple wiring with tap selection

Primary connections are made by choosing the 4.0, 8.0, 16.0 or 32.0 watt tap that matches the zone’s power budget. The electrically isolated windings give a balanced line to the load and reduce interference. A common error is wiring the wrong tap, which either starves the speaker or overloads the amplifier channel.

Verify line voltage and speaker load

Confirm the system runs on a 25V or 70.7V line before ordering. Check that each loudspeaker presents an 8-ohm nominal impedance so the transformer’s secondary matches correctly. Ensure the total tapped wattage on the amplifier does not exceed its rated output.

How it compares

Measured against everything we stock in Studio Monitor Speakers, at today’s prices. Recalculated every night.

Price $41.99
Cheaper than about 90% of the 77 comparable items (median $144.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I verify the Electro-Voice 15732 is performing correctly after installation?

Measure the output at the speaker terminals; the transformer should deliver the selected 4.0, 8.0, 16.0 or 32.0 Watt setting with no more than .5 dB insertion loss across the 50 Hz to 15 kHz range.

What comes in the box with the Electro-Voice 15732 and what must I source separately?

The package includes the 15732 transformer only; you must supply the 25 V or 70.7 V line wiring, an 8 Ohm loudspeaker and mounting hardware.

Which primary power tap should I choose on the Electro-Voice 15732 for my system?

Select the tap — 4.0, 8.0, 16.0 or 32.0 Watts — that matches the amplifier power allocated to this speaker zone on the 25 V or 70.7 V line.

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