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30th January 2011, 05:08 PM
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#1 |
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diyAudio Member
Join Date: Apr 2009
Location: Germany,17039 Wulkenzin OT Neuendorf
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Free the Chassis
Some time ago I bought two PA speakers from RFT. "The" company in speakers and amps in the former eastern part of germany, GDR. The speakers are about 30 years old now. Their name is Vermona 9064 and the chassis are RFT L3512 and RFT L3404
http://www.funpic.de/foto/432178 One day I thought about open baffle again and just gave it a try... I got them out of their stuffy enclosure and put them in several boards of spruce. Tried all kinds of geometrical forms... I even listened a wile just with the chassis for bass and middle.... It sounded so good in a open construction... I couldnt satisfiy my needs and so I changed the original condensators with these Frag Jan zuerst- Ask Jan first: Roehren und mehr Great smooth sound now... Last edited by hifisucks; 30th January 2011 at 05:11 PM. |
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5th February 2011, 04:35 PM
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#3 |
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diyAudio Member
Join Date: Apr 2009
Location: Germany,17039 Wulkenzin OT Neuendorf
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New Fotos and a tweak that really makes the upper chassis unnecessary...
I though about making a phase plug on my own. So here it is and does a great job to the high frequenzies...But most enjoyment I have is a huge soundstage now!!! First I cauciously cut out the center dust cap with a scalpal. Worked well... At our small lake I found some cut off limbs of a ( german: Weide). So I stripped the bark off and cut short pieces... sandpapered them to right size 3,7cm width, 6cm length, drilled two holes, put screws in and shuved them in to the docking area... Wow, I said to the soundstage. But now there is a little to much upper mid frequencies... Maybee I will cut off cm per cm to see what happens... |
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6th February 2011, 08:25 PM
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#7 |
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diyAudio Member
Join Date: Apr 2009
Location: Germany,17039 Wulkenzin OT Neuendorf
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Well, the plug dont win a cake in the end... low end sucks now... and soundstage was a dream...sorry...
So, now listening without plugs... but removing the dust cap really sound better... |
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