Most of you will laugh but when i first started out at around 14 years old, I had a pair of Radio Shack Realistic 18's that slammed, they were around 150 a piece back then. This was when i first got into car audio. If you want a really cheap 18 try MA Audio...but i would stick with Massive...3 12's are equivalent to 2 18's....and in the right ported enclosure....will hit just as Hard and as low....but i agree, Massive should make an 18, and should also bring back the 3", 4", 4x6 plates",5x7", etc...I have alot of customers that want all the same brand but only select vehicles factory locations support what massive offers.