MIDI Solutions Quadra Merge V2

It is a midi merge, it does what it does and you can power it with the midi itself which means you dont have to use another powersupply.
Dunno why it costs so much and there are few products like this so I guess if you are reading this you are at my point.
You can choose this or another one with the same price but with the power supply.
Keep in mind that this one cannot function as a midi expander as far as i understood. If you choose one with powersupply you can extend the midi cable over 10 (?) meters.

I use this MIDI Merge unit for gigs so it has to be reliable. It hasn't let me down. You plug it in and forget about it - it just works. I like that it is powered by the MIDI signal - that's one less power adapter to carry about. If you are looking for a MIDI merge unit you have just found it!!!