I was disappointed with MIDI devices recently. I tried to connect my laptop and MIDI Solutions Quadra Thru V2 via Emu XMIDI 1x1 USB/MIDI adapter and the my other 4 synths. Quadra Thru is a brilliant idea on which this device is built. It needs only 5v which MIDI system is based on.But Emu adapter doesn’t provide such voltage. It doesn’t provide any voltage or just 0.0002v. I haven’t been aware that passive and active MIDI devices exist. MIDI is MIDI and connected devices should work. But they don’t… How could the renowned company, Emu, build such a poor device? I have got two of them. Fortunately, I own M-Audio adapter which provides 5v.