How many 6.5in driver equals one 8in driver


If I am doing a simple math equation of a surface of a circle, pi * r^2, then:

8in. :  3.14 * 4 ^2 = 50.24 in^2

6.5in:  3.14 * 3.25^2 = 33.16 ^2

 

So it seems like it will take 2 6.5in drivers to equal an 8 in. driver.

andy2

Just because a smallish woofer can theoretically put out a 30 hz note does not necessarily mean that it actually sound big & full in the bass in a speaker like a 12” or 15” driver in a bigger ported speaker can that falls off quickly after 35 hz . The smaller driver has to move faster & further than the big driver to produce low notes at higher volumes which can & does introduce distortion of various kinds as the voice coil heats up & changes impedance. 

You also have to account for xmax, enclosure design/ size, efficiency, etc. if you're looking for comparable performance between speakers.

I have a set of Snell Type B Phantoms that have dual 8 inch woofers. They provide very decent bass. However........I previously owned Snell Type A V5's. They had two cabinets with 18 inch woofers. They could shake the house if called upon. I will never be satisfied with anything less! The Type A V5's were Stereophile Class A rated. It would cost well over $60,000.00 in todays money to replicate them. I sold them for a paltry $2200.00!!!! No takers otherwise. It is a very strange world. Very strange.