Beyma 12CX in a MLTL?

G · 8th February 2007, 05:53 AM

Anyone tried it? It should be perfect for the application. Maybe a good match for low powered tube amps.

freddi · 8th February 2007, 03:35 PM

ran one in ancient eliptoflex and a coupler = nice wideband woofer. might be suggestions for MLTL over at Jame's fullrange forum (?) IIRC Beyma recommended 50l reflex tuned to 50 (?)

G · 9th February 2007, 03:35 AM

Quote:

Originally posted by freddi
ran one in ancient eliptoflex and a coupler = nice wideband woofer. might be suggestions for MLTL over at Jame's fullrange forum (?) IIRC Beyma recommended 50l reflex tuned to 50 (?)

The specs are supposed to be 45Hz - 20KHz. Why would you tune the cabinet higher? 50L is doable in my listening area. Would someone be kind enough to run a simulation for this driver? I don't have mathCad. BTW I think the spec sheet is wrong about the low driver having a sensitivity of 104dB 1w/1m. I believe it is 98 dB.

freddi · 10th February 2007, 02:43 PM

I had to use what was laying around - Beyma's response simulation was for 50l & 50Hz tuning - am not sure if that chosen for falt passband. I would tune wherever it sounds best for most music tracks. Tuning above fs can sometimes sound more 'solid' - perhaps because the 2nd impedance peak is lower in amplitude than the first peak (?)

There should be someone "here" (or over at Jame's forum) game to simulate Beyma's 12CX in MLTL - I don't have MJK's sheets nor mathcad

my sample of 12CX had fs higher than 42Hz - perhaps it needed more break-in

Z-plot of coupler tuned ~42Hz

http://img224.imageshack.us/img224/5660/z12cx15js9.jpg

Beyma 12CX specs

http://www.diyparadiso.com/datasheet...beyma/12cx.pdf

Beyma's ~textbook crossover suggestion for 12CX

http://img133.imageshack.us/img133/764/xo1fa2.jpg

8th February 2007, 05:53 AM	#1
G diyAudio Member Join Date: Apr 2002 Location: Belleville, IL.	Beyma 12CX in a MLTL? Anyone tried it? It should be perfect for the application. Maybe a good match for low powered tube amps. __________________ Gavin

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8th February 2007, 03:35 PM	#2
freddi diyAudio Member Join Date: Aug 2005	ran one in ancient eliptoflex and a coupler = nice wideband woofer. might be suggestions for MLTL over at Jame's fullrange forum (?) IIRC Beyma recommended 50l reflex tuned to 50 (?)

10th February 2007, 02:43 PM	#4
freddi diyAudio Member Join Date: Aug 2005	I had to use what was laying around - Beyma's response simulation was for 50l & 50Hz tuning - am not sure if that chosen for falt passband. I would tune wherever it sounds best for most music tracks. Tuning above fs can sometimes sound more 'solid' - perhaps because the 2nd impedance peak is lower in amplitude than the first peak (?) There should be someone "here" (or over at Jame's forum) game to simulate Beyma's 12CX in MLTL - I don't have MJK's sheets nor mathcad my sample of 12CX had fs higher than 42Hz - perhaps it needed more break-in Z-plot of coupler tuned ~42Hz http://img224.imageshack.us/img224/5660/z12cx15js9.jpg Beyma 12CX specs http://www.diyparadiso.com/datasheet...beyma/12cx.pdf Beyma's ~textbook crossover suggestion for 12CX http://img133.imageshack.us/img133/764/xo1fa2.jpg

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