This is a vintage 1984 Electro-Voice reference brochure for the transducer research series Microphones. Form number 2358. This folding brochure measures 8½ x 11 inches 17 x 11 unfolded. The condition is very good+. There is some light creases on the right side. This brochure covers the following microphones;

TR430, TR420, TR410, & TR407

Please see the photos and item details for more specifics. Feel free to message me with any questions or reasonable offers. Thank you.