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One Pi [message #48651]

Sun, 22 January 2006 06:46

Stefan
Messages: 13
Registered: May 2009

Chancellor

Hi Wayne

Can I build One Pi cab with Alpha 8" and Beyma CP-21F instead Vifa
Please tell me what crossover (elements) and attenuator I have to use for HF driver

Thank you in advance
Regards
Stefan

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Re: One Pi [message #48652 is a reply to message #48651]

Sun, 22 January 2006 06:50

Stefan
Messages: 13
Registered: May 2009

Chancellor

Please send me the One Pi plans too

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You've got mail! [message #48654 is a reply to message #48652]

Sun, 22 January 2006 21:42

Wayne Parham
Messages: 18791
Registered: January 2001

Illuminati (33rd Degree)

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Re: You've got mail! [message #48656 is a reply to message #48654]

Mon, 23 January 2006 03:02

Stefan
Messages: 13
Registered: May 2009

Chancellor

Thanks a lot Wayne

What's your opinion about 2xAlpha 8 + Beyma CP-21F
I'll corssover them around 80Hz
I want to use them like front, center and surround speakers with subwoofer system

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Re: You've got mail! [message #48658 is a reply to message #48656]

Mon, 23 January 2006 09:12

Wayne Parham
Messages: 18791
Registered: January 2001

Illuminati (33rd Degree)

Sorry, no experience with the Beyma driver. But your idea is good, so if setup properly, it will be a winner.

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Re: One Pi [message #48672 is a reply to message #48651]

Tue, 24 January 2006 04:17

dB
Messages: 234
Registered: May 2009

Master

Pay attention to big differences in speakers. Vifa DX-25 (DX25TG0504)Fs=650Hz dB=94 (97/98dB to 10K, 96dB to 20K). Beyma's CP21/F Fs=3500/4000Hz. Very high sensitivity (SPL 1W/1M= >100dB). Very good Super Tw but you have to cut-it around 5to7KHz to make the best of it. Very high inductance Le. Also very expensive. You cannot X-over the CP21/F as if it was the Vifa.

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Re: One Pi [message #48690 is a reply to message #48672]

Thu, 26 January 2006 03:20

Stefan
Messages: 13
Registered: May 2009

Chancellor

I'm agree with you dB.
I'll make 2-way system and HP it 80Hz. CP-21F will cut 2-nd order 5kHz. I want to use high sensitivity Beyma because I'll use 2 of Alpha 8. I'll use L-pad for Beyma

In specifications of Alpha 8:
Usable Frequency Range 65Hz - 5kHz

Do you think that will be good frequency responce speakers?

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