What is the best HEAVY METAL speaker?

The JBL LSR is a good speaker for heavy metal. I know someone who had them, and I heard them before he sold them. He played a Metallica album, and it sounded really good. However, he had subwoofers going at the same time.

There seems to be tons of suggestions for "Pro=type" speakers (for lack of a better word), like JBL and Klipsch horn speakers. I've never personally tried this kind of speaker, and am a little reluctant due to the lack of low end production. I'm not really sure how speakers having 12" or even 15" drivers can have such a disappointing low frequency extension. For instance the Klipsch Heresy, an almost universally-loved speaker is listed at 58-20,000 Hz (±3dB). How can this me possible for a 12"? Am I missing something here? I would hate to buy a speaker with a monster driver like that, and huge size overall, and still have to invest $1000 on a SVS or REL subwoofer.

If you do go the way of big fullrange drivers, Emerald Physics is another to check out. http://www.emeraldphysics.com/

Linaeum66 Yes missing something, a basic law of loudspeaker design = Hoffman’s Iron Laws of Speaker Building

1) Bass Extension

2) Efficiency

3) Small Enclosure

The law is that you can only have two of these three

So true, Johnk. I choose #1 and #2. as I know you do.
I have a pair of JBL 4676-A that are waiting for me to find a much larger place.