Port size reduction, and Efficiency 825 & 828

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Originally Posted by horndawg

Glad you were able to experiment and found the port area that best suits your system / room. The following link contains in part a write-up by Pete Riggle on his A7-500 experiments with port area. I found the entire article an interesting read. For the port size experiments, scroll down to about the middle of the page.

Altec A7 Voice Of Theatre Speakers

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I like how he built the xovers. Oil caps and terminal blocks;)

Looks like a pretty solid review and write up

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Originally Posted by Elitopus1

I like how he built the xovers. Oil caps and terminal blocks;)

Looks like a pretty solid review and write up

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Yes E1, I know you like that. Riggle, as I posted, is a very cool guy.

With modern caps available today, I would not use oil caps, and I prefer to wrap one wire around the other, for large contact area, and to Wonder Solder my crossover connections.

Hilarious, ....... why yes !!


Jeff

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Originally Posted by LowOhms

Yes E1, I know you like that. Riggle, as I posted, is a very cool guy.

With modern caps available today, I would not use oil caps, and I prefer to wrap one wire around the other, for large contact area, and to Wonder Solder my crossover connections.

Hilarious, ....... why yes !!


Jeff

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I think two wires smashed together make a pretty good connection. In fact, I have used wire nuts before with no audible difference to me. :p

FWIW, many decades of of UL/CSA [and no doubt others] wiring/termination testing has proven cold welds to be the best, which a plastic wire nut is a crude variation of when the proper terminal, crimping tool isn't available and can be audio signal grade when it has a copper coil 'twister' inside and the joint is sealed up against contaminants such as with this goop: http://www.alliedelec.com/m/d/896682...dc78f9e2b3.pdf

GM

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Originally Posted by GM

when the proper terminal, crimping tool isn't available GM

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I do love my Thomas and Betts

+1 :D Built anymore cool boat designs?

GM

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Originally Posted by GM

+1 :D Built anymore cool boat designs?

GM

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nothing with machine guns atm. but still on call ;)
Wiring helm electronics and controls on Nor-Tech fishing boats right now.

Nice! Lots worse ways to making a living!

GM

thanks GM
With my 828s I ended up with an 8" concrete tube cut at a 6" length. it seemed to work out ok when I was using an 846b Xover. it had a very strong 35-40 HZ. but then I now run a triamp setup with the Xover point at 85 Hz, so the 828 isn't playing below that. I would guess it not really doing a whole lot at this point.

Not really, might want to try stuffing/blocking it off to see if there's any improvement in SQ.

GM