i have no idea what meter was used, my good mates at my audio shop tested it for me, i cant say how itsz been tuned as i didnt tune it myself, they tuned it all for me, its all customized in the boot of a 1990 nissan silvia.
Im my car setup I have 2 jl e1400d amps and currently have a 12w3's hooked up to each amp, atm its pulling around 143db. I was wondering if I upgrade my subs to 12w6v2's will it hit around just under the 150db mark or will it make not much of a difference at all???