Re: Help with Sub vs amp wattage
That amplifier will not produce 500 watts. That is the peak power rating and it means nothing. It's also not likely that it will do its RMS rating of 125 watts per channel so the most you could expect from it bridged would be ~175-200 watts, which is not too much power for a 150 watt RMS sub. In addition to that, the wiring kit that comes with that bundle is undersized and won't be of much use if you ever get ready to upgrade your system and the sub is an entry level sub that won't do much other than be loud.
I understand that budget is a concern but I also understand the "bass bug" and I would hate to see you buy this setup, catch the bass bug and then find out that not one thing you bought could realistically be used in a more powerful and better sounding setup. That said, if you think you'll be happy with this entry level setup, then by all means get it. But if you think you may want more down the line, you'd be well served to save and buy one piece at a time until you have an expandable and dependable entry level system.
You can even find some really nice, high quality used gear here from time to time.
Owner, Audio Anarchy, LLC
2915 Youree Drive, Shreveport, LA