A friend of mine looking to build a subwoofer is looking at a 750W amplifier for his subwoofer and it costs about 800 bucks. If the item is out of warranty and you had to pay over a thousand for the 1500W amp in the JL subwoofer, it is IMHO not entirely unexpected.
In some respects, it is like if you buy an old Ferrari 360 for cheap money and baulk at the maintenance cost of running a Ferrari.
In some respects, it is like if you buy an old Ferrari 360 for cheap money and baulk at the maintenance cost of running a Ferrari.