SamS Posted August 11, 2006 Share Posted August 11, 2006 Dumb question: Why is cast frame better than stamped? Quote Link to comment Share on other sites More sharing options...
BEC Posted August 11, 2006 Author Share Posted August 11, 2006 from Wikipedia: Frame design The frame, or basket, is the metal structure that holds the cone, voice coil and magnet in the proper alignment. There are two types of frames, stamped steel and cast. Stamped steel, as the name implies, is a lower-cost alternative, stamped from sheet metal. The disadvantage of this type of frame is the woofer basket may flex or even resonate if the speaker is driven at high volumes. Cast baskets are more expensive, but are usually much more rigid, and therefore the preferred design. Quote Link to comment Share on other sites More sharing options...
DrWho Posted August 11, 2006 Share Posted August 11, 2006 It rings less and is a bit sturdier - though I don't think ringing is an issue with either??? Maybe there are other benefits as well. Quote Link to comment Share on other sites More sharing options...
Guinness Posted August 11, 2006 Share Posted August 11, 2006 wow, 1.5k, that would be excellent for anyone using an gentle slope type xover. I recall on another thread that the stock k-33 has trouble reaching half that. Cornwall owners, heads up. Aside from the frame rigidity benefit, is there an advantage to increasing the woofer crossover frequency on a Cornwall? What would be ideal? Quote Link to comment Share on other sites More sharing options...
BEC Posted August 11, 2006 Author Share Posted August 11, 2006 I think the lower FS (26 hz) compared to the current production K-33E (34 hz) would be the best reason to go to these new woofers in a Cornwall. Bob Crites Quote Link to comment Share on other sites More sharing options...
Guest " " Posted August 11, 2006 Share Posted August 11, 2006 Guinness I wouldn't change the xover points. On a gentle slope xover, the cornwall would have more upper mid-bass definition using BEC's woofer than the standard one. Quote Link to comment Share on other sites More sharing options...
grogB Posted October 14, 2008 Share Posted October 14, 2008 apart from the improved mechanical rigidity the cast aluminium frame will give more motor strength. A steel frame will draw some of the magnetic energy away from the magnet system. the effect is not huge but certainly measurable i'd always go for a cast aluminium frame if i had the choice. Quote Link to comment Share on other sites More sharing options...
michael hurd Posted October 14, 2008 Share Posted October 14, 2008 Some, if the steel is not already saturated in the magnetic assembly. You reach a certain point where adding more magnet slugs does nothing but increase rearward clearance. Quote Link to comment Share on other sites More sharing options...
MechMan Posted October 14, 2008 Share Posted October 14, 2008 Will this New Cast frame be an improvement on a stock 77 Cornwall with stock x-over? Quote Link to comment Share on other sites More sharing options...
Guest David H Posted October 14, 2008 Share Posted October 14, 2008 Certainly not going to hurt, I really love the newer woofer in my 78 Cornwalls, It just sounds better to me. If you have not done so already order a set of crossover caps from while you are at it. You'll be in for a treat. Quote Link to comment Share on other sites More sharing options...
music_man01 Posted October 28, 2008 Share Posted October 28, 2008 Hey Bob, I'd like to update some Lascalas I bought in the Nurumberg PX back in 1982, What are we talking ballpark to do such a task? I currently have those, Corns, Fortes, RF 3's and some other odds and ends but the Scales were the first. Craig Short craigshort@joimail.com Quote Link to comment Share on other sites More sharing options...
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