FR125 with Passive radiator

badman · 13th March 2006, 02:53 PM

Anyone seen this done? I've always preferred passive radiators to vents, and was thinking the little Seas 6.5" PR in a 16L cabinet with no added mass (tunes it to 50ish) would be just about right for the FR125, any thoughts?

Cal Weldon · 13th March 2006, 03:06 PM

I am a fan of PR's so I can't be objective. I say go for it. Just don't seal the cabinet permanent until you're sure about the weight issues with the drones. I assume you are using one FR per side?

badman · 13th March 2006, 05:18 PM

Yeah, was planning 1 FR and one PR per side. Was thinking upfiring PR. These would be desktop speakers for work.

Landroval · 13th March 2006, 06:38 PM

I like the idea, might work with the FR125. Do you know the Qts of Seas SP17R? Can't find it.

The cheap Dayton SD215-PR seems to do well also, might be worth a try.

badman · 13th March 2006, 07:54 PM

A passive radiator shouldn't have a Qts, Qts being a function of the mechanical and electrical characteristics, and as a passive radiator has no electrical or magnetic characteristics (unless you include the steel frame which is irrelevant here) it also has no Qts.

Landroval · 13th March 2006, 09:15 PM

Argh, I was trying to say Qms, which a passive radiator should have.

Landroval · 14th March 2006, 06:27 PM

Qms of the Seas PR's?

badman · 14th March 2006, 06:49 PM

I haven't seen it spec'd. Perhaps somebody else knows?

knorke · 14th March 2006, 07:27 PM

Done that with ood results....

knorke · 14th March 2006, 07:33 PM

ood = good ;--)
backside:

13th March 2006, 02:53 PM	#1
badman diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	FR125 with Passive radiator Anyone seen this done? I've always preferred passive radiators to vents, and was thinking the little Seas 6.5" PR in a 16L cabinet with no added mass (tunes it to 50ish) would be just about right for the FR125, any thoughts? __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

13th March 2006, 03:06 PM	#2
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	I am a fan of PR's so I can't be objective. I say go for it. Just don't seal the cabinet permanent until you're sure about the weight issues with the drones. I assume you are using one FR per side? __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

13th March 2006, 05:18 PM	#3
badman diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	Yeah, was planning 1 FR and one PR per side. Was thinking upfiring PR. These would be desktop speakers for work. __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

13th March 2006, 07:54 PM	#5
badman diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	A passive radiator shouldn't have a Qts, Qts being a function of the mechanical and electrical characteristics, and as a passive radiator has no electrical or magnetic characteristics (unless you include the steel frame which is irrelevant here) it also has no Qts. __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

14th March 2006, 06:49 PM	#8
badman diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	I haven't seen it spec'd. Perhaps somebody else knows? __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!


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13th March 2006, 06:38 PM	#4
Landroval diyAudio Member Join Date: Oct 2004	I like the idea, might work with the FR125. Do you know the Qts of Seas SP17R? Can't find it. The cheap Dayton SD215-PR seems to do well also, might be worth a try.

13th March 2006, 09:15 PM	#6
Landroval diyAudio Member Join Date: Oct 2004	Argh, I was trying to say Qms, which a passive radiator should have.

14th March 2006, 06:27 PM	#7
Landroval diyAudio Member Join Date: Oct 2004	Qms of the Seas PR's?

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