Pa Subwoofer

what watt speakers would I need for a room 20 x 60 with 75 people in the room?

They currently play records and you can't hear anything. I have music and a mixer etc but crap speakers.

It depends on what volume levels you need.

I have considerable experience with sound in a room roughly half that volume and with a crowd of up to 120. I'd say four speakers, roughly at the corners of the room, at least 200 watts per. The speakers should be pro audio PA types with at least 12 inch woofers and compression horn tweeters and midrange, and should be hung or up on stands, firing over the audience's heads. That will be enough for uncomfortably loud volume levels, but you won't be feeling the bass hits - for that you need much more power, driving PA subwoofer cabinets.

If you don't need the volume that loud, then 100 watts per channel would be enough, assuming good efficient speakers.

Note that these are amplifier power ratings, not speaker power ratings. Your speaker power ratings need to be at least 2/3 of the max amplifier power. They don't need to match, and they can be much higher.

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