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18th December 2006, 10:34 PM
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#1 |
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diyAudio Chief Moderator
Join Date: Oct 2002
Location: Athens-Greece
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My New Hi-Res Toys
EJ Jordan JXR6HD and Alcone. I will make sealed cabinets good for 40Hz -3dB in room and let you know in due time.
http://www.ejjordan.co.uk/drivers/ |
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19th December 2006, 01:34 AM
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#2 |
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diyAudio Member
Join Date: Dec 2003
Location: Columbia, SC
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Very pretty
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19th December 2006, 03:46 AM
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#3 |
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diyAudio Member
Join Date: Jan 2005
Location: San Diego, CA
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Alcone
Hello Salas - interesting combination - I've never seen any measurements of or projects with Alcone drivers - do you have prior experience with them and do you know how well they perform?
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Soft Dome |
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19th December 2006, 08:45 AM
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#4 |
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diyAudio Chief Moderator
Join Date: Oct 2002
Location: Athens-Greece
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You will see by me soon. The woofer has a very good construction. The idea is to help the Jordan and stay away 3 octaves lower than Alcone's alu cone breakup. A cunning 2 way crossing in non sensitive area is the goal. Aluminum well tempered is killer resolution. First measurements show +10Hz Fs than published. For frequency charts I have to arrange for the cabinets first since there is no meaning in general measuring.
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19th December 2006, 12:46 PM
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#5 |
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diyAudio Chief Moderator
Join Date: Oct 2002
Location: Athens-Greece
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On a positive note, I have seen that the manufacturer refers (an extra note in their homepage in German) to technical changes not mentioned in the Alcone AC 8 HE pdf. To Alcone's credit their new FS, Qms, Qes, and Qts matches mine after some hours of Fs sine wave run in. Vas measures 13 litres higher though. They need to revise their pdf. SPL is 91dB for 2.83V exactly as published.
The speaker looks perfect for the job I have in mind for it and its priced at 89 Euro. I wouldn't go for a 2.5k cross with such cones though. 5k breakups are strong and they always create IMD at an octave lower, even when notches are applied and response at breakup looks cool. |
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19th December 2006, 05:33 PM
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#8 |
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diyAudio Member
Join Date: Jan 2005
Location: San Diego, CA
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Consul - sorry a total sidebar here but I can't resist -
"Never be afraid to try something new. Remember that a lone amateur built the Ark. A large group of professionals built the Titanic." - Dave Barry - Not a fair comparison - consider the "lone amateur's" architect! 
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Soft Dome |
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19th December 2006, 05:43 PM
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#9 |
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diyAudio Member
Join Date: Nov 2003
Location: Port Huron, Michigan, USA
 
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Okay, I'll give you that. Still, though, no matter how good the design, you still need a good builder to make it all work.
Kinda like DIY speakers, innit? (And watch how I deftly get us back on topic...)
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