MultiVoltage Quadra Thru 1-in 4-out MIDI Through Box

Awesome little device! works great.

Solved all my problems.

Hubby was trying to figure out how to better isolate the sound coming from 3 keyboards and he found this device. He said it works perfect for his needs.

Plain and simple. Buy this one, it works with everything. Don’t buy cheaper. This is the one!

This unit is a life saver. requires no power which is amazing, just remember there are older MIDI keyboards out there like the Roland A-37 that do not product enough power to power this unit. It's rare though! I've used it a lot and have NOT had issues with stuck notes like one might expect in the cheap merger. Really works nice. Don't drop anything on it, it's light plastic!

I bought this to add multi midi outs from an iPad, but the iPad midi interface didn't have the power to operate the active midi thru box. I ended up running the iPad midi out into my one device that did have a midi thru jack, and then into this box...the thru from that device (a lexicon reverb) was able to power the quad 4 thru box. So as a note of caution, if all you have is an iPad and a simple one-out midi interface, this box might not work to provide multiple midi outs for you since the iPad will not provide enough power through the midi interface to power this thru box.

I play the Akai EWI-5000 as a controller with two MIDI synthesizer boxes. I was driving the second box from the Thru output from the first one, but it just went crazy. Plugging directly from the EWI to the second box it worked perfectly. I just received the Quadra Thru and installed it into my setup. Perfect! Both MIDI synths are now working with no problems. Just what I needed. I especially like that it doesn't need its own power supply, but is powered through the MIDI cable. Two thumbs up!

It works great. But, my only complaint is with being able to assign channels. If you hook up more than 1 synth to the through box it is randomly assigned in whatever controller you are using. I can assign synth 1 to channel 1 while it is the only synth plugged in, but when I plug another synth in it might be 1, 2, 3 or 4 and synth 2 could be where I assigned synth 1. Otherwise it is a very inexpensive way to control some gear. And it works great!