i sent an email to my dad about it. hes been musicing for longer than i have been alive. this is what he has to say.
We used one of these amps once. I borrowed it from Melnyk. This is how you add more speakers. A cord comes out of the front of your amp into this and two more speakers come out of this. They sell for around $200. You won't get it for $25. Be careful on the road. dad
200 bucks? hahah. I got my PA in 1994. this solid state power amp is 13 years old now. 200 brand new YES. 25 dollars used ..... YES !!!
now all i need is more fucking speakers !!!! YES!!!
doog. come on ! you just posted a photo of 2 amps on top of each other looking AWESOME. thats what i want to do. you just dont want me to stumble onto something that looks awesome because you are already doing it. dont lie.
Yeah, they're not my amps. And unless the guy has modified his cab for both pairs of speakers to take their own input, I very much doubt they're both hooked up.
YOU CAN'T RUN ONE POWERAMP INTO ANOTHER
That's the last time I'm saying that. Blow up your shit, see if I care..