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Electro-Voice Professional Sound Reinforcement Products used to provide Builder’s Plans for a series of speaker cabinets called the “TL Series Low-Frequency Loudspeaker Systems.”

The TL806 was a small ported cabinet designed specifically for the EVM12L:

The Electro-Voice TL806 low frequency loudspeaker system is a vented-box (bass-reflex) design with gross internal volume of 1.3 cu. ft. The system has been designed for use with the Electro-Voice EVM12L 12 inch loudspeaker.

Recently many people have discovered what a nice job this cabinet did to complement the driver (speaker) and that the cabinet works very well with a wide range of other guitar speakers. It is a nice bonus that the cabinet can be easily made from 3/4″ plywood, 2 1/2″ x 3/4″ strapping material, brads/staples and glue in a simple home shop.

The cabinet’s outside dimensions were: 14 1/2″ wide by 17 3/4″ high by 13 1/2″ deep. The design was carefully crafted to just barely clear the mounting dimensions of a 12 inch driver (front mounted).

When I went to build a couple of these I scaled the height so that a standard Dumble-like head could be perched upon a couple of speaker cabinets lying on their side (see photo). I believe that Brian’s test results are based on cabinets close to the original dimensions, but with an internal construction that doesn’t rely on strapping.

If you are interested in these cabinets the original builders plans are archived by Telex, here. I’ve uploaded the TL806 for your convenience: TL806 Builder’s Plan.