2. speakers
  3. 173358-20253

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
rixthetrick's avatar
rixthetrick
1,060 posts
 

@erik_squires what do you account the two large dips at 150 and lesser at 250 Hz in your room? I'm guessing you used a white noise sweep as your source tone?

The kit looks pretty good mate.

herman
2,251 posts
 

it is impossible that you are actually getting as much output at 20Hz as you are in the midband.

erik_squires OP
16,037 posts
 

what do you account the two large dips at 150 and lesser at 250 Hz in your room? I’m guessing you used a white noise sweep as your source tone?

 

That and the peak at 30 Hz is all room/speaker/microphone location related.  Some of this would probably get smoothed out if I used multiple locations for the mic and averaged them out.

OmniMic uses swept sine waves, not really noise for these measurements.

it is impossible that you are actually getting as much output at 20Hz as you are in the midband.

@herman In an anechoic room you’d be correct. The room however bedevils those expectations, and that’s the point of the posting. Without these measurements I could do sooooo many things wrong in attempting to improve the quality of the bass.

erik_squires OP
16,037 posts
 

At some point over the holidays I'll take measurements at different volumes, I am pretty sure that we won't be able to maintain the bass output, so it will be fun to see how it cuts out as the power goes up.

nolojunko
34 posts
 

Your what?

More to discover