Although i suggest you to read M_Audio, take in count that this controller only transmit on 1 channel, which you can choose.-
If you have a PA4x 76 there is no reason to make that, because your PA is enough flexible to manage any type of music.- But most important reason you can't control your PA4x with that controller.-
For a full controll with 88 notes the M-Audio KeystationPro, you can controll most of PA4x.-
Just an opinion.-
Good luck with your experiment.-
Korg Kronos 2 88 - Korg PA4x 76 - Roland Fantom 08 - Korg N1R Sound Module - Korg 05RW Sound Module - Roland UM550 Edirol Midi Patchbay Amp pair SWR California Blonde II