MT 18 6cubes @33hz response graph

[sku 10+ year member]

go monkey go

Uhh, that's chihuahua (sp?)?

 

[ga12r 10+ year member]

Looks like your enclosure may be tuned to about 44HZ if you are peaking at 50-51. If you are tuned to 33 and peaking at 51 and you box is right, then your vehicle must really have a high resonant freq. If you are looking for a flat response you are definitely using the wrong sub, MTS are built for high freq burbs, what did you expect?