Do Passive Radiators need Chamfering to sound best? - diyAudio
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Old 22nd September 2014, 12:05 AM   #1
aarvin2 is offline aarvin2  Mauritius
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Default Do Passive Radiators need Chamfering to sound best?

Hi folks, I would be very interested to know if the mounting surface around/behind passive radiators need to be chamfered in order to sound optimal ?

Has anybody tried it?

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Old 22nd September 2014, 01:07 AM   #2
Ron E is offline Ron E  United States
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Quote:
Originally Posted by aarvin2 View Post
Hi folks, I would be very interested to know if the mounting surface around/behind passive radiators need to be chamfered
No. What is teh wavelength at your tuning frequency? Of course, there is always gilding the lilly and pride of construction to be factored in...
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Old 22nd September 2014, 01:11 AM   #3
sreten is offline sreten  United Kingdom
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Hi, No is the simple and short answer, rgds, sreten.
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Old 22nd September 2014, 02:44 AM   #4
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In this case, sreten is correct. the correct answer is no.

Ron E is also correct, but no need to mention that, imo!
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Old 22nd September 2014, 02:44 AM   #5
badman is offline badman  United States
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Agreed with sreten. Passive radiators don't have the big constriction caused by a magnet structure, so they "breathe" pretty easy, so unless you're talking about a VERY thick baffle wall (like 3"+) for a 12" passive, you're fine.
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Old 22nd September 2014, 02:53 AM   #6
Bare is offline Bare  Canada
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I'd simply not use the things.. even easier :-)
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Old 22nd September 2014, 06:01 AM   #7
OllBoll is offline OllBoll  Sweden
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I'd agree on no =)

The PR works on low frequencies, and those wavelengths are so long they will in no way care about some small chamfering unless it is enormous, as in a roundover of several meters...
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Old 22nd September 2014, 07:03 AM   #8
godfrey is offline godfrey  South Africa
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Agree with "no".
BTW, that smiley is reserved for use by the mods.

Edit by Moderator: Removed.
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Old 22nd September 2014, 10:22 AM   #9
aarvin2 is offline aarvin2  Mauritius
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Originally Posted by Ron E View Post
No. What is teh wavelength at your tuning frequency? Of course, there is always gilding the lilly and pride of construction to be factored in...
Tuning frequency will be around 60Hz, and the size of the P.R will be maybe 5 inch or 6.5 inch.


The very curious thing is that even on subwoofer websites and recommendations, they do emphacize that "chamfering is essential for the subwoofer to breathe" ... which got me thinking.

The thickness of the baffle will be 4.2 cm.

I also felt that while using a 4 inch speaker(foxtex FE103E) without any chamfering, the bass felt constricted(contrary of opening). The sound in general sounds like it's not expanding.

Just sharing my observations.

I guess we'll have to try it out.
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Old 22nd September 2014, 10:27 AM   #10
aarvin2 is offline aarvin2  Mauritius
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Quote:
Originally Posted by Bare View Post
I'd simply not use the things.. even easier :-)

It's either this ... or using like 2 meters of piping
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