This is a three way, powered P.A. cab, that makes a great stand alone bass cab. Just add your favorite pre-amp for big fat bottom, punchy mids and crisp highs. The enclosure houses one 15", one 6" and a horn, each powered w/its own enternal power amps. Go to mackie.com for all the specs. The cab is in good to excellent shape cosmeticlly, and has seen very little use outside of the practice room. I'm in Santa Barbara, Ca., and I prefer a close sale so I don't have to ship, but we can talk. Asking $500, and these go new for around $900. PEACE!!!!!, Johno!