I just want to clear up the fact that these speakers are listed as 2ohm on most web sites and when you get them they say 4ohm on the box. The fact is they are 3ohm give or take .4ohm, tested with a Fluke multi-meter. I mention this because a low quality amp or even mid-line amp may cut off and heat up at higher volume even if the MFG says they work with 2ohm. The speakers sound very good at high volume and I recommend you get the Infinity Kappa 4 amp to go with these puppys. They have very rich highs. Anyone who has owned Infinity speakers for car or home know the quality. I would recommned this product for mid to high systems.