I've got the free WinISD Pro which has an Altec 515-8HHP installed and although I don't know how to use this program and no matter what box or vent size I pick (trial and error), that driver does not plot as well as my 418-8hII. With both the 418 in an 8 cu ft box and 11X3 sq in vent or 416-8A in an A7-500, I have the EQ boosted at the very bottom and top only and both sound great (music content only, no video).??
?? Sorry, I miss your point.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
LOL. Sorry for the ramble, I didn't know anything about the 515's and thus the 604's and after playing around, I was concurring with the above statements that the 515 and all Altecs for that matter need EQ at the top and bottom of the frequency spectrum.
Not sure I agree with 'all' unless limited to the systems designed for a high output impedance since speakers with 411s, etc. designed for SS amps generally don't need any bass boost in a typical HIFI/HT app. WRT the HF, if CD horn EQ is used, the highs generally don't need boosting either.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
OK, I retract everything I wrote. My only experience with Altec has been the A7's, 418/32B thingy?s, and a quad of 421/511B powered PA thingy?s, but it has been a 35 year long and lovely journey.
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