![]() The ½ was a sealed two way design with a 6” woofer with butyl rubber surround and a paper cone tweeter and the ¼ was a 41/2 full range driver in a small ported cabinet. There was also a Model ½ and ¼ released later. This was basically a Model 1 with two 8” woofers and the cabinet size increased to load both woofers. After the 2 and 3 were released there was a need for a model between the 1and 2 and DLK 1 ½ was developed. The midrange was the same and the tweeter was the same as used in the model 1. The woofer was nearly the same as used in the Three but had a doped folded fiberglass surround and a smaller dust cap and was designed for the ported cabinet. The model 2 cabinet had the same height and width as the 3 but was not as deep and was ported. This tweeter was very cutting edge at the time. The tweeter was a Matsushita doped cloth dome with a sealed back. A 4.5” paper midrange with a doped fiberglass surround in a sealed sub-cabinet. The 3 had a 12” woofer with a foam surround in a sealed cabinet. The Model 3 was developed first and the Model 2 was a modified 3 made to be smaller less expensive. Both these were three way designs with the woofer and tweeter in phase and the midrange out of phase to smooth the x-over notch distortion, a common practice then. The next speakers were the Model 2 and 3. It was a two way design using a Phenolic Ring tweeter and an 8” paper cone tweeter with a butyl rubber surround. The DLK Model 1 was the first speaker in the line. All the DLK speakers were made of ¾” mdf and had hand rubbed oiled book matched walnut veneered cabinets. Don did extensive testing of drivers and in the DLK line did not use off the shelf drivers but had them slightly modified to his specifications and 2nd order x-overs were used in all models. The company originally made speakers under the Omega label and later developed a higher end line under the DLK label. Don was an excellent engineer and had a state of then art lab for the time based on Bruel & Kjaer test equipment. ![]() The name is derived from name of the engineer Donald L. The company was a wholly owned subsidiary of Schaak Electronics based in Minneapolis MN. I started working there in 1972 my employee number was (1). Paul, I have not see the 4's but I have heard the 3's. here is some info on them someone posted for me on another site. ![]() ![]() Hey Eilati, I own the same model 1 DLK's. ![]()
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