Okay, so I just picked up a Peavey Mark IV Head and will have a cabinet for it soon. I have a Peavey Minx 110, and I am considering selling it so that I do not start stock piling gear the will just languish. At any rate, I have a nagging feeling that I should keep it. Especially for its Power Amp in/out / preamp out feature. The thing is I do not know exactly what I can do with this feature. Could I use the preamp go to a power amp and run a much larger cabinet. If so, damn, I should have just done that instead of going on a amp head hunt. Here is a description from the manaul regarding the function: A stereo out/in jack is provided for line-in patching of effect devices from two amplifiers. A shielded 'Y' cord with a 1/4'' stero plug branching into two 1/4' mono plugs is required for this connection. The "tip" of the stereo plug routes the signal effects device input. The effects output is returned through the "ring". The "sleeve" is ground. The first click of this stereo jack can be used as a preamp output with out disturbing signal flow to the remainder of the system. NOTE: if the second click is used without returning any signal to the system from an effects device the preamp will be disabled. The Preamp level is approx. 1 volt RMS and is high impedance (600 ohms). Any effects device used in this loop must be capable of recieving this 1 volt input and providing 1 volt in order to properly drive the power amp. Would some one please enlighten me as to what I do with this piece of equipment so I can decide to ditch it or not? Could I use the first "click" to preamp into a PA?