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 Post subject: Re: The eggs
PostPosted: October 27th, 2017, 9:52 am 
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Joined: July 8th, 2016, 4:34 pm
Posts: 155
When you decide to go active you might consider the following -

http://rtaylor.sites.tru.ca/2013/06/25/ ... are-howto/

Linkwitz comments on Taylor's work -

http://www.linkwitzlab.com/LX521/DSP_challenge.htm

Richard Taylor's dsp crossover for Linkwitz Lx521 -

http://rtaylor.sites.tru.ca/2013/03/20/ ... tware-dsp/


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 Post subject: Re: The eggs
PostPosted: October 27th, 2017, 10:49 am 
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Joined: July 24th, 2015, 4:17 pm
Posts: 501
Location: Parkville, Maryland
What size capacitors would you want to use? I'd like to jump into the pool.

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 Post subject: Re: The eggs
PostPosted: October 27th, 2017, 11:18 am 
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Joined: February 28th, 2013, 3:31 pm
Posts: 702
The passive crossovers are already built. Here are two photos.

Tom


Attachments:
Woofer crossover_small.jpg
Woofer crossover_small.jpg [ 232.06 KiB | Viewed 213 times ]
Mid _ High crossover_small.jpg
Mid _ High crossover_small.jpg [ 317.48 KiB | Viewed 213 times ]
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 Post subject: Re: The eggs
PostPosted: October 27th, 2017, 11:24 am 
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Joined: July 8th, 2016, 4:34 pm
Posts: 155
Where would we be without Parts Express?


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 Post subject: Re: The eggs
PostPosted: October 27th, 2017, 11:25 am 
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Joined: January 13th, 2016, 9:14 pm
Posts: 402
Sounds like a crossover party.

I will bring a DSP one to try when it occurs.


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 Post subject: Re: The eggs
PostPosted: October 27th, 2017, 12:44 pm 
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Joined: July 17th, 2016, 6:24 am
Posts: 291
tomp wrote:
I'm starting with passive (ugh) but will move to active later when time permits for a direct comparison.
Tom


Unless your system is voiced properly with passive crossover components, any comparison with active crossover would be moot point. In my experience, the capacitors in crossovers make a huge difference. I suspect, cheapest active crossover will do well compared to passive crossover with Dayton caps.

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 Post subject: Re: The eggs
PostPosted: October 27th, 2017, 12:51 pm 
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Joined: July 17th, 2016, 6:24 am
Posts: 291
DaveR wrote:
tomp wrote:
I got the eggs and bases today back from painting and had time to assemble one of the eggs. I have the other egg, the bases, and the crossover housings yet to finish. If any of you are going to the DC HiFI Group meeting Sunday it will be there.

Tom


You mean Saturday, correct?


Is the meeting moved to Maryland?

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 Post subject: Re: The eggs
PostPosted: October 27th, 2017, 1:03 pm 
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Joined: February 19th, 2017, 9:43 am
Posts: 129
Yes.


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 Post subject: Re: The eggs
PostPosted: October 27th, 2017, 1:07 pm 
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Joined: July 24th, 2015, 4:17 pm
Posts: 501
Location: Parkville, Maryland
tomp wrote:
The passive crossovers are already built. Here are two photos.

Tom


I was trying to steer you away from those Dayton caps. They are horrible in any application yet you guys still insist on using them. Did you ever wonder why they are so damn cheap?!

You can't judge the quality of those speakers with Daytons. I was going to hook you up with mil-spec polycarbonates similar to what I used in the B&W crossovers.

You might have second thoughts about electronic crossovers if you do.


Attachments:
B&W 802-80 Updated Crossover - Top.jpg
B&W 802-80 Updated Crossover - Top.jpg [ 1.72 MiB | Viewed 201 times ]

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 Post subject: Re: The eggs
PostPosted: October 27th, 2017, 1:13 pm 
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Joined: February 28th, 2013, 3:31 pm
Posts: 702
Cogito wrote:
tomp wrote:
I'm starting with passive (ugh) but will move to active later when time permits for a direct comparison.
Tom


Unless your system is voiced properly with passive crossover components, any comparison with active crossover would be moot point. In my experience, the capacitors in crossovers make a huge difference. I suspect, cheapest active crossover will do well compared to passive crossover with Dayton caps.


This is a subject for another thread but last year a few of the group did a double blind test of passive crossover caps at David Berning's house with some expensive caps there were rated very highly against some that were rated as worse than crap. No one could tell the difference in that test.

Another thing is that using active eliminates the caps, inductors, and resistors. THere is nothing to get in the way between the amp and drivers. You can also do lots more like time alignment, etc with active. BTW, each driver in this system was individually measured and the values of the crossover components individually matched to the drivers.

Tom


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