airspace for level 3 10's for spl???

[tigerh4rf]

Guys if i do a ported wall with 10 10,s or 12 10's what amout of airspace per sub to yield the most spl output on meter burp box only not a daily driver noy musical also power will be 5 or 6 gp 3000 pros was thinking starting at 1.50 cube per sub tuned at 55hz does that sound like that will work?/

[Ray]

id do .9 each

[matt402]

<1.2 cubes p/sub.