RFZ and gap

Rairun · 25th September 2010

Is leaving too much gap behind RFZ panels a bad thing? In another saying, should i leave gap as much as possible? Or is there an optimum value?
Thanks

AnthonyRochester · 26th September 2010

So you are leaving a gap in order to trap lower frequencies, right? RFZ panels are primarily for specular reflections, which do not involve low frequencies that behave modally (use basstraps for that). But leaving 2-4 inches gap behind it makes it more effective at lower frequencies. I don't think there's any point making it bigger than that, because you'll go past the 1/4 wavelength max. energy point. Does this make any sense?

Ethan Winer · 26th September 2010

Quote:

Originally Posted by Rairun

should i leave gap as much as possible? Or is there an optimum value?

The ideal air gap is equal to the panel thickness, but with thick panels you can go to twice as big a gap. Full explanation in my Acoustics FAQ in the section "Optimizing the Air Gap":

Acoustics FAQ

--Ethan

________________
The Acoustic Treatment Experts

Glenn Kuras · 27th September 2010

There has been testing of 703 and 705 with a 16" gap which shows pretty nice results. See the following.
http://www.bobgolds.com/AbsorptionCoefficients.htm
I think though if you want to be safe then stick with the thickness of the panel.

25th September 2010	#1
Rairun Gear nut Joined: Apr 2008 Location: Istanbul, Turkey Posts: 113 Thread Starter	RFZ and gap Is leaving too much gap behind RFZ panels a bad thing? In another saying, should i leave gap as much as possible? Or is there an optimum value? Thanks

27th September 2010	#4
Glenn Kuras Gear Guru Joined: Jul 2005 Location: Atlanta, GA Posts: 11,994	There has been testing of 703 and 705 with a 16" gap which shows pretty nice results. See the following. http://www.bobgolds.com/AbsorptionCoefficients.htm I think though if you want to be safe then stick with the thickness of the panel. __________________ Glenn Kuras GIK Acoustics USA GIK Acoustics Europe 770 986 2789 (USA) +44 (0) 20 7558 8976 (UK) See the NEW Scopus Tuned Trap

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread starter	Forum	Replies	Last Post
GAP-73 with mods or plain GAP-73 and sm7b	rol123	Low End Theory	15	20th March 2010 04:54 AM
Bigger RFZ	ciro	Bass traps, acoustic panels, foam etc	49	22nd May 2009 07:53 PM
RFZ Calculation Assistance?	tubeman	Studio building / acoustics	22	21st April 2008 05:50 PM
RFZ Panels	mr. torture	So much gear, so little time!	2	1st August 2007 07:23 PM
RFZ-V741	HABBER	So much gear, so little time!	0	26th November 2006 08:57 PM

26th September 2010	#2
AnthonyRochester Lives for gear Joined: Jun 2007 Location: somewhere in Tasmania Posts: 1,262	So you are leaving a gap in order to trap lower frequencies, right? RFZ panels are primarily for specular reflections, which do not involve low frequencies that behave modally (use basstraps for that). But leaving 2-4 inches gap behind it makes it more effective at lower frequencies. I don't think there's any point making it bigger than that, because you'll go past the 1/4 wavelength max. energy point. Does this make any sense?