MRP-M500 - Alpine Monoblock 500 Watt RMS Power Amplifier
I mounted the m500 in my spare tire wheel well of my sedan on a custom platform, etc.  Running two 6.5\\" eD subs wired at 4 ohms.      The amp does a great job and stays cool at all times.  I've tried a few other boxes in the trunk at times (2 ohm JBL 12\\", 4 Ohm Kicker CVR 12\\") and this amp always pushes the speakers very well.      For the money, it's a great amp to use in a small/medium sub setup.  You can install it anywhere without overheating concerns and it seems to produce at it's power ratings.