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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

Showing 1 response by atmasphere

atmasphere's avatar
atmasphere
11,633 posts
 

If the amp has a high output impedance the speaker might have a much higher output in the bass resonance area than one would expect. Nelson Pass demonstrated this at a RMAF about 10 years ago using a current source amp and open baffle speakers.

The distances from the wall also influence the speakers; if inside the room boundary effect a +3dB per octave gain will be seen from about 100 Hz down.

I'm thinking this could easily be a 2 way ported box with 8" high excursion woofer.

 

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