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Well i got 3 10" subs and Im gonna buy an amp off this one guy..The subs are 300 Watts and the amp is 800 watts...Will the subs sound good if i use the 800 watt amp?

 

That is a little vague for us to give a good response. For a generic response, yes you can run 3 subs rated at 300 watts with 800 watts. Will it sound good? We would need more info. Type of subs, type of amp, box type, model numbers.