Hey all - I've got a deal in the works and I'm pretty excited about it, for an EP800v4. My main question and I don't seem to be able to find any info on google is what is the difference between V2, V3, V4?

I had for a long time an EP600v2 and loved it, the tone and character of the bass was amazing! But didn't like the brick wall at 20Hz and am very excited to hear (feel) how deep the 800 can go!