ok i own a peavey xr-500 and its running into a 215 cab with 1 jack both speakers wired to each other , every time some one starts singing into it compression comes on and baffles the sound , no mater what i do it dont turn off , what can i do to get a louder sound out of it ?

also another question

i got a hartke 2500 amp head , can we hook a mic to that and use it as a pa till i get my hands on something better (when cash permits)
no oh no
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behringer pb1000
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Are there both channels in the PA you can use, one for each speaker, rather than two in one channel?
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