Mark Hardy Posted February 27, 2006 Share Posted February 27, 2006 Nice thread; I hadn't seen it until just now. Thought I'd share a photo of the innards of a 1974 Cornwall with the AlNiCo EV tweeter and Atlas MR for comparison. I got rather more carried away damping the MR horn. Never thought to add some mass to the woofer basket, tho'. The XO, of course, is the original, stock one. Quote Link to comment Share on other sites More sharing options...
BiggerIsBetter Posted February 27, 2006 Share Posted February 27, 2006 I also have the K51 in my '81 Corns. Since there is not much info, I'll add my .02. In my room (always the caviot I start with), the K51 is very flat (and sounds great IMO) up to around 4K. There is a fair dip around 4.5K and a huge 8-10 dB bump from 5-6K, where it signs off. I mistakenly assumes that it was the K77 accounting for the 5-6K bump, since I saw the K51 signing off around 4.5K, until I tested the drivers separately. When I did the 5-6K bump was all the K51. This is with a simple type B. As such I am looking forward to adding the .51 mH inductor as a bandpass. I expect that this will about level of the K51 out to 6K. Bob's new tweet will pick up from there, I have all value caps from 2-4 and I will "back down" the K77 until is gives a flat transition from the K51. It also seems, can't be sure as I was making lot of changes and not focusing on the mids, that the 5-6K bump in the mid got worse when I went from the K-600 to K-401 horn. I have no idea whether this type of response is typical from a K51 (give my sample size of 2 and no free field measurements), just some info FWIW Quote Link to comment Share on other sites More sharing options...
3dzapper Posted February 27, 2006 Share Posted February 27, 2006 I'm surprised that no one has mentioned the extra cabinette bracing in Ward's Cornwalls yet. Quote Link to comment Share on other sites More sharing options...
Wardsweb Posted February 27, 2006 Author Share Posted February 27, 2006 I'm surprised that no one has mentioned the extra cabinette bracing in Ward's Cornwalls yet. Is that not stock? Again, I 've never seen stock before, so I have nothing to compare to. Quote Link to comment Share on other sites More sharing options...
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