Don't in now if this is the right place to post but I have 8 ev 1502er in my basement. I was looking at a good way to power them the yamaha is not enough I am looking for concert loud sound in my basement thanks.
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What model of Yamaha amplifier do you have now?
... and I am assuming your first name is Joel. Thank you for posting with your real full name as required by the rules. However, to avoid people questioning you, you might want to re-format that display name to read Joel Wojcik, if that's indeed your real name. (If it isn't... then you need to update it!
And great subjective question- how loud is "concert loud" ? In your mind, that is. Since all concerts are different... Do you have a target as to how loud you want to get? How big is your basement? Do you want/need to use all 8 speakers? What is the budget you're willing to invest in this?