I will tolerate your opinion as unsubstantiated impressions, no more or no less. If it can be substantiated as fact then we will all benefit from your experience. Interesting thoughts you put forward - just the sort of input that promotes discussion.
Opinion is only as valid as its verifiable supporting evidence.
If you could hear timing difference you didn't do it RIGHT.
Rejecting something after doing it wrong is kinda silly.
Honestly, if you just want crossover info a general audio forum might be better. this forum is Altec specific.
And if you like to argue, try Romy the cat's forum...
Your neighbors called. They like your music.
Well, would have to side with OG somewhat.....very subjective maybe OT in the strictest sense. However I did this same route some years back and here's my... as Mah put it..."unsubstantiated impressions". If memory serves I used 511s/808s/416s. 10-15ohm resistor to pad down the HF drivers along with a 8-10uf cap and a 1uf bypass cap. The 416 was hooked up straight with no inductor. The mid and HF sounded fairly opened and detailed. However the bass for many would probably be considered thin, anemic. When I supplimented the bass with 18" B52's subs, everything seemed to (suprisingly) come together. Again...totally unsubstantiated and subjective to personal opinion , room acoustics , program material to name a few! I do think it is instructive to listen to individual drivers at times with minimal crossover components connected though. Especially for (DIY) matching/diagnostic purposes. BTW..wecome to the forum Jeff!
Hi OG,Originally Posted by Old Guy
If you could hear timing difference you didn't do it RIGHT.
Rejecting something after doing it wrong is kinda silly.
Honestly, if you just want crossover info a general audio forum might be better. this forum is Altec specific.
And if you like to argue, try Romy the cat's forum...
Thanks, that is pretty funny, you have assumed I did it "wrong" and I am silly. Then you suggest I go to another Forum !!
How can I get into so much trouble in just two posts on this Forum??
Goodness, I would have thought just the opposite : " If I can readily sense the sonic signatures of two different amps, with different time constants through each, I did it very RIGHT ".
I happen to think that is pretty easy to sense OG.
Also, I don't have to prove this to anyone, other than me,.... myself being satisfied. YMMV as I originally posted, fine !! I do understand and respect that. No problem for me. Just don't tell me I am automatically wrong, because we disagree.
Finally, since my original post is specifically about Altec A7s, with Altec components, this should be the best Forum to ask others to share their experiences with 6 dB. crossovers.
Your posts, and you, are appreciated by me. Lets just say we have different listening experiences and disagree, and leave it civilly like that. Thanks for contributing !! .
Jeff
Jeff,
I think that OG was suggesting that another forum's membership may better be able to get really into the specifics of crossover design, whether it be generalized for the components or tailored to your listening environment's acoustics....
Lansing heritage has some xo experts posting frequently, as does DIY.....
I think it has to do with the expertise of the forum members on the topic at hand, rather than you getting into trouble here with the regulars
.........................
dave's not hear
Also benefit from a 6db xo on my A7s. The original Altec xo's were missing when I bought the used A7s; the 12db after-market replacements were dreadful. At any rate, following countless hours of trail and error settled on the 6db xo, at approximately 600hz as the most musical, transparent, and dynamic XO I could cobble together without any sort of test gear, other than my ears. Power handling is not an issue as I rarely listen above loud conversation level.
No doubt, there are issues with the xo that need to be rectify, but without proper test gear and a lack of technical skills, it?s just not going to happen.
I?ll post a drawing of the xo later, welcome all comments, useful or otherwise.
Cheers
My experience and conclusion as well. I was going to say in my earlier post that the 6db xo worked well at medium to moderately loud volume only. Couldn't keep up with my 19's at high volume! Would like to see your xo drawing and values.
Hi SD 50 !!!
Yours was a post I was looking for. There must be others too. You and Larry Moore settled on a similar approach...by ear. Yes, others would like to see your schematic.
I am so HAPPY you responded.
There are two things I'd like to send you, if you are open to looking them over. One would be Larry D. Moore Esquire's A7 write up, done a number of years ago. Another is a SERIES crossover " primer ", two way and three way at 6 dB, instead of the usual Parallel passive crossovers. The same parts are employed, just minor / different wiring. Some ( Dominique, Paul Eizak, Bud Fried ) say SERIES sounds superior. Just need your email address, to send the info. as attachments. ( Any one else is welcome to it. )
What ALTEC components do you run? What power amps do you use ? Curious minds want to know. THANKS for posting sir.
Jeff
(Insert Popcorn eating emoticon here)
I never cared for biamping my M19's either. And I used identical amps for highs and lows. PP 6B4G modified Heath W5's. No sand amps in my system. The issue was probably my x-overs, but just never messed with the whole thing because the stock x-over just sounded better.
I have messed with 6db slope stuff. On A7's as well. But the woofer section has a peak at 250-300hz, and that just became accentuated. To my ears anyway.
So Jeff, do it and have fun and tell us what you hear.
Ron
Enjoying Altec Speakers since 1972
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