Can you bring in your own amp and guitar to play in the store?

Yes u can, u can even jam out with the wrkers who know how to play an instrument. Cool place.

You can hook up to amps at the store, but mostly it's people trying out guitars they want to purchase.

You would have to ask them.

Will they buy speakers from you

Yes

I don't know. You'd have to ask a salesperson. I have seen people testing out amps, and playing on guitars they're interested in purchasing. There's a bass room with amps, amps on the common space of the floor--people test these out frequently. In addition to this, there's an acoustic guitar room I've seen guitarists playing in. There's another room that houses the expensive or higher grade guitars, but I haven't seen anyone playing guitars inside. Ask them, but I don't think they'd allow outside instruments unless you're bringing it in for repair, exchange, to test out an amp, or a class.

I believe they have a room with a amplifiers so you can play your guitar