ORIGINAL: PReal

Youare completely wrong. What science are you using to come up with the incorrect statement that the two sizes of subs will have different sound. My 12 for instance in more "accurate" then even a set of 8's I have. A speaker is merely a piston that moves air at a given frequency. If the box is built to spec there is a certain "backpressure" on the woofer. Following Newton's seond law the enclosure will create a force on the cone of the woofer pulling it back into the enclosure.For a 10 or 12 in the recommend enclosures (with the same backpressure) and operating conditions, there will be no difference in the accuracy of the two woofers. The force from the box of the 12 would couter act that of the woofer with the force required to bring the woofer back to refernce point. If a 10 was given the same conditions it would move with the force required to bring it back to reference.

Basically, all things being equal a 10,12,15,18 or any reasonable sized woofer will react in exactly the same way, creating the same frequency and the same accuracy. I assumed a rigid cone, but with high quality woofers that assumption would be correct, otherwise it would deflect greatly from the forces of the magnetic reaction causing the speaker to move outwards and the opposition force moving it back inwards.

If you are "coming across" boxes that means you are buying prefab, that is the cause of you lack of "accuracy" from a 12.

Now that your learned on that... subject 2.

Profile amps are very reliable, and contrary to many bargain basement brands put out thier rated power. Have you ever own a profile? Probilbly not, i own two along with my diamond audio, fultron and concept amps. They are stout for the price and if you do have a problem the warranty service is great. I received emial corrspondence from an American, and I beleive he was also the tech that repaired my amp. Overall, my impression of profile is stellar from a low budget standpoint, and you will find other knowledgalbe people with more then likely share the same opinion.

Please do as much homework and reading you can before you give people advise. You can cause them to make uneducated decisions. It seems as though you are somewhat knowledgeable, so please stick around and give advice where you do have expertise.

If you purchased 2 dual 4 ohm subs, you would wire them in parrallel to come up with a 1 ohm final load. THe D6 1000.1 puts out 1000 watts rms at 1 ohm.