![]() What is speaker impedance? (the “Ohms” rating) Speaker basics and speaker wiring explained.I'll get to the pictures this weekend for you. I was impressed that they took the time of showing us around and speaking with us. I can attest to the B&K test equipment in the labs throughout the company. Shields had given us during the tour and I'm really sorry about that 25+ years later. Unfortunatly I didn't hang on to much of the documentation that Mr. It was a typical assembly line layout, well organized and everyone looked to be in good spirits. He showed us the whole works from the engineering side to the assembly and shipping side including the cabinet manufacturing. The gentleman that showed us around, Michael Shields, (if memory serves) was surprised that anyone would want a tour of a small speaker factory. When I noticed that the DLK factory was just down the street we gave them a call and asked if we could stop by and take a look see. He had a pair of DLK 1.5's and I was running AR's. It was in the early eighties (80-81) and I was living in Bloomington at a apartment complex called International Village with a college buddy. The x-over in the model 4s were made in pairs with matched drivers and x-overs and all the capacitors were large Mylar sand filled type. This was known for its large size almost four feet high and it’s cultured marble top. The final speaker was the DLK Model 4 which was basically a 3 with two 12” woofers. The ¼ could be seen on the back deck of many cars in the seventies in the early days of car stereos. 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. The midrange was the same and the tweeter was the same as used in the model 1.Īfter the 2 and 3 were released there was a need for a model between the 1and 2 and DLK 1 ½ was developed. 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. Here is the little I have picked up over time since I picked up my Model 4's:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |