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Guess How Big My Speakers Are

If you read any of my threads on here or looked at my virtual system you probably already know the answer to this question, but for those who have not, try this as a thought exercise. Given this plot alone how big a speaker do you think this is?

Frequency response plot showint extension to 20 Hz

 

Hints:

  • 2’ from sides, 1.5’ from rear
  • Ported
  • Not horns
  • No EQ applied. This is the natural in room response using short sine sweeps.
  • For a living room this is a well treated room with GIK soffit traps, bass traps and diffusion panels strategically placed.

I’ll reveal my answer if we get 5 guesses or more. :)

erik_squires
sbank's avatar
sbank
3,379 posts
 

Since that bass response would make everyone thing of large floorstanders, I'd guess bookshelf monitor size...or the post would pose far less intrigue 😉 

Cheers,

Spencer

mijostyn's avatar
mijostyn
8,570 posts
 

This could be the curve of any loudspeaker because Erik has not told us where the mic is. You can get that kind of bass out of an LS3 5A if you put the mic one foot away from it. The mic is obviously farther away as you can clearly see room nodes in the bass. There is a strong one at 30 Hz which is boosting the bass but 20 Hz is 8 dB down and is down even lower at other parts of the room. I would guess without the node the speaker starts rolling off at 40 Hz. Volume also makes a difference. This is probably a smaller tower or medium sized bookshelf speaker. Something with two 8" woofers or one 10" 

 

erik_squires OP
16,383 posts
 

Speakers are about 11' apart, with a listening/mic location about 12' from the plane of the speakers.

This is most definitely an in-room response sort of scenario as opposed to quasi-anechoic (i.e. not close microphone).

kingharold
304 posts
 

I give up.  How big are your speakers?

 

 

djones51
4,947 posts
 

3 way bookshelf

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