The Electro-Voice 309-8T is an
8-inch, 16-watt coaxial built-in ceiling speaker with a built-in 70.7 V / 100 V transformer
. 8-inch woofers of the loudspeaker and the high-temperature voice coil assemblies are equipped with wide-spreading cone tweeters.

The double magnet construction allows each speaker to be magnetically, electrically and mechanically independent of the other.

• 16-watt coaxial ceiling component loudspeaker with 2.5" cone tweeter
• Transformer power connections include 1W, 2W, 4W and 8W for 70.7V lines
• Two-way crossover with 6dB @ 3.0kHz