Hotdog Posted March 9, 2010 Author Report Share Posted March 9, 2010 when someone comes to me for a high efficiency woofer, I go with a shorter coil, lighter moving mass cone, stiffer spider, and Fs usually will end up, and stay in the mid 40s efficient at a lower Fs, I usually use a very high Bl coil, copper wire, with a lot of layers, and use a softer suspension. I have a special 18" cone/spider combo that I use to make low Fs woofers that are really efficient , and handle pretty good power When I say low Fs 18s, Iam talking about 13-16hz with a Bl of 68 - 80TM, hence a 18" that can go in 1.7cf sealed, or 2.5-3cf ported low Nice.. have to hit you up some time. I think all my questions have been answered.. hopefully anyone else wanting to know differences between coils can use this thread as starting point. (NEW) 2004 F-150 Build Log -->http://www.stevemeadedesigns.com/board/topic/192208-hotdogs-f-150-build-log/ 2003 Mercury Mountaineer Build Log --> http://www.stevemeadedesigns.com/board/topic/114380-hotdogs-2003-mountaineer-build-log-20-removed/page__gopid__1602379#entry1602379 2008 Equinox Build Log --> http://www.stevemead...g/#entry1475764 Link to comment Share on other sites More sharing options...
smity Posted June 14, 2015 Report Share Posted June 14, 2015 Forevrbumpn can you please message me? I tried to send a message but it said you couldn't receive new messages. Link to comment Share on other sites More sharing options...
AlexanderLeet Posted January 12, 2019 Report Share Posted January 12, 2019 What about RF T212D4? Is it bad 'cause it has a 4" voice coil instead of a 3" or what? Link to comment Share on other sites More sharing options...
White Lightning Posted January 12, 2019 Report Share Posted January 12, 2019 Everything is dependent on application and goals. If subs had all the same design goals, they would all be the same just like air brakes on a big rig. Just Saying Kenwood / HELIX / Linear Power (For The Love Of Music) / Brutal Sounds / OverKill Electric Co Questions About Sound Quality ?? Try Here ... Sound Quality, What does it REALLY mean ?? SMD SOTM Winner "White Lightning" 1997 GMT400 Chevy Silverado "The Green Dickle" 1994 GMT400 Chevy "Phantom Dually" Randal's 2007 Chevy Avalanche (we haven't named this one yet) Dylan's "Brutal" 17 Chevy Cruze RS Hatch Link to comment Share on other sites More sharing options...
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