what is this lanzar and pyramid thing? i heard that pyramid bought out lanzar or something like it, and lanzar is now similar to pyramid junk. i do know that the old school opti drives are awesome though.
The manufacture "Sound Around" In brooklyn, new york makes lanzar, legacy, pyle, plye pro, and pyramid. thats why alot of thier houseing designs are simular if not the exact same. the boards on the amps differ with comapines....hince why lanzar amps are WAY better than it's sister companies.
now by WAY better i mean that for the money some lanzar class D amps (mainly the vibe series (vibe 300d 600d 1200d and 1800d). and the newer optidrive series (benched it's rating and ran rather cool (temp. not just stylin) for a .5ohm amp in the cover page aricle in CA&E magazine (subscribed too

)
lanzar the company however doesnt seem to put the same kind of quality into many of thier other products, such as head units, speakers, etc... but thier sub amps shine......i've owned and had experience with the vibe 1200d and 1800d and for the price you get a great bang for the buck.
as for power acoustik i personally have not had any first hand experience wih thier amps but have heard nothing but good things as they are on that same great bang for the buck type amps. you probly couldnt hear a differance between the 2. Now if you get a memphis,mtx, orion,kicker, jl, fosgate, re, eD, PG, PPI, us amp, blah blah blah blah blah im high........ you could probly hear a small to incredible differance in audio........but thats just my 2 cents