HighSpeedLowDrag

16 channel amp I assume you must be talking about the CM9760-CDU-T. There may be a small signal distribution amplifier from Sennetech. Look into the SDA1X5-422. Sennetech is never cheap though. Your only other option for PTZ rs422 wiring is to Daisy Chain the wiring. Home running of data from spectra cams sometimes works and sometimes does not. It is a hit and miss. Its always better to do it the right way first. As for your multiple controllers you may want to research into Pelco's CM9760-DMR. This device will handle up to four controller devices speaking the same protocol to one output port. Your two KBD300A keyboards will require the KBDKIT each to power them. You can probably go to a local electronics store and pick up a power supply and wall jack for your keyboards but stick with the KBDKIT. It has the right power supply and correct wall jack to use. Hope this helps......