- Thread Starter
- #561

Thanks for your feedback.Amazing, op! What a ton of work you've done - certainly helps collate the bits and bobs of disenfranchised spreadsheets I've found trying to research a sub for my room.

So, I've read that multiple subs generally help to even response out in a room, but if I am looking at your sheet for my 5600 ft^3 room, I should be looking at a single 'extreme' sub. If multiples add to the total output, is there an easy way to generalize the possibility of reducing the sub size? ie, if I need a single 'Extreme', is it reasonable to use two 'Large'?

The cool thing about bass summation is that it’s frequency dependent. Well really, wavelength dependent. That means that with multiple subs you only get a 3dB increase for each doubling of subwoofers. But you really are getting a 6dB increase below about 30hz.

I've previously explained about how 'Bassaholic' protocol works.

Here are the formulas:

You can literally recreate my spreadsheet by following the formula above.Small:

=IF(AND(25hz<103,31.5hz<109), "Small", "")

Small/Medium:

=IF(OR(AND(25hz<103,31.5hz>=109), AND(25hz>=103,31.5hz<109)), "Small/Medium", "")

Medium:

=IF((AND(25hz>=103,31.5hz>=109,40hz>=109,50hz>=109,63hz>=109)), "Medium", "")

Large:

=IF((AND(25hz>=109,31.5hz>=115,40hz>=115,50hz>=115,63hz>=115)), "Large", "")

Extreme:

=IF((AND(25hz>=117,31.5hz>=123,40hz>=123,50hz>=123,63hz>=123)), "Extreme", "")

So with my first point about multiple subwoofers, and the formulas above, you can calculate the output needed for multiple subwoofers, for your room.