A two-way with Scan-Speak 8542-05 and Vifa D25AG 35-06
By Lars Mytting
31 Dec 1996
The Box
Bass reflex. Enclosures made of 22mm MDF. Outside dimensions: 24 cm wide, 40 cm high, 35 cm deep. Net volume approx. 16 litres. Tweeter centre was offset 8 cm from the side and 10 cm from the top of enclosure, mirrored on the other speaker. 8 mm sound absorbing foam on the baffle. Bass reflex port on the back. The port used was 7 cm in diameter and 18 cm long, but tuning must be chosen according to listening room and taste.
I covered the inside with 10 mm thick pine wood. The boards were 10 cm wide, and fastened to the MDF with standard white glue. I then applied a layer of 1" Akustilux damping mats. (The usual stuff made of synthetic dead sheep)
Pine is a rather "soft" wood, and was chosen because I wanted to test if its different density from MDF would "eat" midrange resonances. MDF alone will get into resonance with midrange signals, especially female voices. I built another pair of similar enclosures, but without wood damping, to use as a reference for the tests.
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