Home » Sponsored » Pi Speakers » Alpha 10 in thrift store boxes .... help?
Alpha 10 in thrift store boxes .... help? [message #46494] Tue, 15 March 2005 09:57 Go to next message
James is currently offline  James
Messages: 23
Registered: May 2009
Chancellor
Ok ... I'm screwing up the courage/determination to build Pi 8's. But in the meantime, how do I put my Alpha 10's to good use, quickly? I've got two sets of thrift store boxes, heavily built, from the '60's. One set is 1.65 ft3, the other set is 2.08ft3.

I also have a pair of EV T-35's (not sure which version). Any suggestions for box tuning, xover with these HF horns?

I might also go ahead and purchase the PSD2002 & horn combo, just to get going ...

Thanks very much for any suggestions.

Regards,

Jim

Re: Alpha 10 in thrift store boxes .... help? [message #46495 is a reply to message #46494] Tue, 15 March 2005 10:20 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18682
Registered: January 2001
Illuminati (33rd Degree)

Those box sizes will work fine. Just tune 'em to 40Hz and you're set. Use a 2" or 3" mailing tube and cut to the proper length. To know how long to make them, use the Helmholtz formula.
Re: Alpha 10 in thrift store boxes .... help? [message #46496 is a reply to message #46495] Tue, 15 March 2005 11:31 Go to previous messageGo to next message
James is currently offline  James
Messages: 23
Registered: May 2009
Chancellor
Thanks very much, Wayne. A quick ? about xover ... could I use the Pi 8 xover and the PSD 2002/h290 combo with this?

Thanks again,

Jim

Re: Alpha 10 in thrift store boxes .... help? [message #46498 is a reply to message #46496] Tue, 15 March 2005 15:07 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18682
Registered: January 2001
Illuminati (33rd Degree)

No, you don't want to use an eight π crossover with an Alpha 10 used as a direct radiator. The tweeter section is fine but the midwoofer section would be wrong. You might use the crossover for something like a three π, but with Zobel values for the Alpha 10.


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