Openly Baffled? - Page 2

Drew Eckhardt · 13th April 2012, 12:28 AM

Quote:

Originally Posted by Puffin

If you remove the rear panel from a speaker are you likely to experience what an open baffle might sound like?

No. You're going to loose your bass and get a multi-lobed polar mess at high frequencies where the timbre won't sound natural.

Puffin · 13th April 2012, 05:43 AM

Quote:

Originally Posted by Drew Eckhardt

No. You're going to loose your bass and get a multi-lobed polar mess at high frequencies where the timbre won't sound natural.

Ok

Jim Shearer · 12:15 PM

You may find it of interest to check out MJK's site:
Quarter Wavelength Loudspeaker Design
Martin has several papers on OB design and performance.

As many here already know, Martin also has MathCAD worksheets for modeling a wide variety of speakers.

Cheers, Jim

sreten · 13th April 2012, 01:11 PM

Hi,

It is possible with a large speaker in a large cabinet that taking the back
off will sound OK, but this presumes the box is a boom box in the first
place, fitted with a high Qts driver with a very prominent upper bass peak.

A well designed box and driver simply won't work with the back off, no bass.

rgds, sreten.

Puffin · 13th April 2012, 02:23 PM

Sreten. The speakers in question are PA speakers that could be said to be a bit "boom boxy" 15" bass, mid-range horn and 5 bullet tweeters. The whole cabinet is un-damped and there is a large diameter, but fairly shot port on the rear. I have to say that they are not all that bad having used them in my main system

13th April 2012, 12:10 PM	#13
Jim Shearer diyAudio Member Join Date: Jun 2007	You may find it of interest to check out MJK's site: Quarter Wavelength Loudspeaker Design Martin has several papers on OB design and performance. As many here already know, Martin also has MathCAD worksheets for modeling a wide variety of speakers. Cheers, Jim __________________ A day without music is like a day without food. Last edited by Jim Shearer; 13th April 2012 at 12:15 PM.

13th April 2012, 01:11 PM	#14
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, It is possible with a large speaker in a large cabinet that taking the back off will sound OK, but this presumes the box is a boom box in the first place, fitted with a high Qts driver with a very prominent upper bass peak. A well designed box and driver simply won't work with the back off, no bass. rgds, sreten. __________________ There is nothing so practical as a really good theory - Ludwig Boltzmann When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

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13th April 2012, 02:23 PM	#15
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	Sreten. The speakers in question are PA speakers that could be said to be a bit "boom boxy" 15" bass, mid-range horn and 5 bullet tweeters. The whole cabinet is un-damped and there is a large diameter, but fairly shot port on the rear. I have to say that they are not all that bad having used them in my main system