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2nd June 2009, 12:31 PM
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#1 |
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diyAudio Member
Join Date: Apr 2002
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Apogee Scintilla capacitors
I've bought a 20 year old ribbon speaker (Apogee Scintilla) and noticed that the midrange is quite dark.
Should the Sprague polypropylene caps (25 of them!) be replaced given their age? Do polyprops perform more poorly as they age? |
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3rd June 2009, 09:23 AM
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#2 |
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diyAudio Member
Join Date: Jul 2007
Location: South Worcestershire
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As far as I know, polyprops don't suffer ageing.
Age is solely a problem with electrolytic capacitors. |
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3rd June 2009, 11:19 AM
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#3 |
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DIY !
diyAudio Member
Join Date: Apr 2002
Location: Stavanger, Norway
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__________________
Ars longa, vita brevis |
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4th June 2009, 02:05 PM
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#5 |
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expert in tautology
diyAudio Member
Join Date: Apr 2002
Location: New York State USA
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Dark probably means low output from the tweeter ribbon?
These speakers were never known to be dark. Of course a bit depends on your amplification, as the load is rather low Z... so the amp might be "croaking" on the load?? _-_-bear
__________________
_-_-bear http://www.bearlabs.com [...2SJ74 Toshiba bogus asian parts - beware!  ] -- Btw, I don't actually know anything, FYI --
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4th June 2009, 02:21 PM
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#6 |
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diyAudio Moderator
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__________________
If there's a sucker born every minute, where do the rest of them come from? |
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5th June 2009, 04:18 AM
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#7 |
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expert in tautology
diyAudio Member
Join Date: Apr 2002
Location: New York State USA
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Ummm... SY? These are magnetic ribbon speakers?? No bias, no diaphragm connection like ESLs have...
_-_-bear
__________________
_-_-bear http://www.bearlabs.com [...2SJ74 Toshiba bogus asian parts - beware! ] -- Btw, I don't actually know anything, FYI --
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5th June 2009, 07:52 AM
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#8 |
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DIY !
diyAudio Member
Join Date: Apr 2002
Location: Stavanger, Norway
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The crossover:
http://www.apogeespeakers.com/projec..._schematic.gif http://www.apogeespeakers.com/projec..._schematic.gif Arne K
__________________
Ars longa, vita brevis |
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5th June 2009, 09:15 AM
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#9 | |
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diyAudio Moderator
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Quote:
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