thomwake Posted March 29, 2005 Share Posted March 29, 2005 Just wondering if there is any difference between the Atlas PD-5VH driver and the Klipsch K-55. I have an opportunity to buy some PD-5VH drivers really cheap to use in some LaScala's I'm building. Thanks in advance, Thom Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted March 29, 2005 Share Posted March 29, 2005 Thom. They are the same drivers. Quote Link to comment Share on other sites More sharing options...
Deang Posted March 29, 2005 Share Posted March 29, 2005 Let's look at some pictures. This is the plain wave tube response as found at the Atlas site for the PD-5VH. The upper end response doesn't change all that much when mounted on a horn. Notice where it drops off, which is in line with the published frequency response of 4.5kHz. Quote Link to comment Share on other sites More sharing options...
Deang Posted March 29, 2005 Share Posted March 29, 2005 Downsized a bit to fit in the post correctly. Quote Link to comment Share on other sites More sharing options...
Deang Posted March 29, 2005 Share Posted March 29, 2005 Here is the DFH, with the raw graph published by Klipsch of the original K-55-V (with the spring loaded terminals), and the new one after the redesign. Big difference. Now, which driver does the current stock PD-5VH most resemble? Quote Link to comment Share on other sites More sharing options...
3dzapper Posted March 29, 2005 Share Posted March 29, 2005 Here is a plot AL K did of a K-55 in a K-400: http://forums.klipsch.com/idealbb/files/k55plot.jpg Quote Link to comment Share on other sites More sharing options...
Deang Posted March 29, 2005 Share Posted March 29, 2005 Here is a BEC trace of a new, current production PD-5VH. Quote Link to comment Share on other sites More sharing options...
Deang Posted March 29, 2005 Share Posted March 29, 2005 BEC trace of a K-55-V with spring loaded terminals. Quote Link to comment Share on other sites More sharing options...
Deang Posted March 29, 2005 Share Posted March 29, 2005 Interesting stuff for sure. Quote Link to comment Share on other sites More sharing options...
cueman Posted March 31, 2005 Share Posted March 31, 2005 But Thom, you didn't bid enough !!! Todd I was watching those too. Quote Link to comment Share on other sites More sharing options...
WMcD Posted March 31, 2005 Share Posted March 31, 2005 Wow. The DfH shows the infamous 9.1 kHz peak on the old and an 8.5 kHz peak on the newer. I thought only some of the Atlas drivers have the peak. Gil Quote Link to comment Share on other sites More sharing options...
Hardhead Posted March 31, 2005 Share Posted March 31, 2005 ---------------- On 3/29/2005 9:50:13 PM Daddy Dee wrote: Thom. They are the same drivers. ---------------- The K-55-V spring-loaded driver and the new PD-5VH drivers are the same, and they both have a one-piece phase plug. I checked directly with Atlas on the PD-5VH phase plug issue. The K-55-V with the solder terminals is an improvement because it has a two-piece phase plug and consequently is smoother and sounds better than either the spring-loaded K-55-V or the PD-5VH. I suspect that the new K-55-X has a one-piece phase plug, also, but that's just my guess. Quote Link to comment Share on other sites More sharing options...
Deang Posted March 31, 2005 Share Posted March 31, 2005 I suspect that the new K-55-X has a one-piece phase plug, also, but that's just my guess. That's what I think too. It's also hard to ignore the new crossover point of 4500Hz between the squawker and tweeter -- which just so happens to be the published top end response of the PD-5VH. Not much point in using a driver that goes out to 6kHz if you drop the crossover to 4500Hz and use a 6th order filter. Quote Link to comment Share on other sites More sharing options...
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