A couple months back, I finished converting an old pair of Paradigm Export Monitors to an active crossover:
http://www.diyaudio.com/forums/multi-way/298422-active-paradigm-export-monitor-upgrade.html
The results were very good, especially considering the constraints inherent in modifying a design rather than starting with a blank slate.
Alas, one of the tweeters is on its way out. Gritty sound from it, and gradually getting worse. Time for another project!
Since this is an active speaker, I have a lot more latitude in selection of a replacement. I have two of these on order, Vifa XT25TG30-04:
https://www.amazon.com/gp/product/B002WCQ4DG
They should fit the baffle cutout exactly, though I'll need to drill a few holes for the mounting screws.
I'll document the driver measurement, peq, and crossover design here as I make progress.
http://www.diyaudio.com/forums/multi-way/298422-active-paradigm-export-monitor-upgrade.html
The results were very good, especially considering the constraints inherent in modifying a design rather than starting with a blank slate.
Alas, one of the tweeters is on its way out. Gritty sound from it, and gradually getting worse. Time for another project!
Since this is an active speaker, I have a lot more latitude in selection of a replacement. I have two of these on order, Vifa XT25TG30-04:
https://www.amazon.com/gp/product/B002WCQ4DG
They should fit the baffle cutout exactly, though I'll need to drill a few holes for the mounting screws.
I'll document the driver measurement, peq, and crossover design here as I make progress.
True just not sure why anybody would NOT go for the even nicer BG60 version.
Only $3 extra get you higher sensitivity and lower distortion.
But it is probably because many (incl. some retailers) mistake the double magnet for shielding which in these days of flat screens is practically obsolete.
Only $3 extra get you higher sensitivity and lower distortion.
But it is probably because many (incl. some retailers) mistake the double magnet for shielding which in these days of flat screens is practically obsolete.
Sorry for crossposting!
This fits that original Vifa D25 tweeter:
https://www.madisoundspeakerstore.c...eak-voice-coil-600058-for-d27tg35-or-d27tg45/
This fits that original Vifa D25 tweeter:
https://www.madisoundspeakerstore.c...eak-voice-coil-600058-for-d27tg35-or-d27tg45/
Ok, I'm back, and this has been done. Damn, those are some tweeters. Granted, one of the old ones blew (which precipitated this project), but wow, the improvement... don't hesitate to use these VIFA units if they match your response needs.
They were indeed a direct fit. I performed crossover (active) in DSP, and it's sitting at 1776Hz. Response is basically flat now between 40hz and 20000hz in my room.
They were indeed a direct fit. I performed crossover (active) in DSP, and it's sitting at 1776Hz. Response is basically flat now between 40hz and 20000hz in my room.
Attachments
Hey Charles,
BTW, I finally DID see this ring radiator in a shielded version, but from very old speakers. I think I now understand the issue.
The shielded version has a can on the back. Looks like a bare soup can. I could see an average tech. writer getting confused.
The extra magnet is NOT shielded at all.
From what I can tell the shielded version has been out of production for at least a decade.
Best,
Erik
BTW, I finally DID see this ring radiator in a shielded version, but from very old speakers. I think I now understand the issue.
The shielded version has a can on the back. Looks like a bare soup can. I could see an average tech. writer getting confused. The extra magnet is NOT shielded at all.
From what I can tell the shielded version has been out of production for at least a decade.
Best,
Erik
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.