[. . . ] G U A R A N T E E D F O R L I F E 1 MANUAL Thru 1x4 TM 1 IN/4 OUT MIDI THRU BOX Thru 1x4 1 IN/4 OUT MIDI THRU BOX TM The Thru 1x4 MIDI Thru Box allows any received MIDI signal to be sent to up to four separate MIDI devices. [. . . ] The instrument which is connected to the Thru 1x4's MIDI IN must be turned On in order for the 1x4 to receive power. To use Thru 1x4, connect its MIDI IN to the MIDI Thru 1x4 Hook-Up Diagram From MIDI Out of Master Keyboard or Sequencer POWER MIDI IN +9VDC (Optional) Thru 1x4 TM 1 IN/4 OUT MIDI THRU BOX MIDI OUT 1 2 3 4 To Various Instrument's MIDI Ins Out of the instrument or sequencer you are "Thruing. " Next, connect each of Thru 1x4's MIDI OUTs to the various instrument's MIDI Ins. All of Thru 1x4's MIDI OUTs are identical so it doesn't matter which MIDI OUT is connected to which MIDI In. However, very, very, rarely you may encounter some older MIDI device which requires more power than Thru 1x4 can deliver. This can only happen if the instrument draws more power than allowed in the MIDI specification. If you encounter this situation, there is a standard 9 volt, center pin positive, power jack on the side of Thru 1x4. [. . . ] Joseph Street · Arcadia, CA 91006-2861 · Tel: (626) 445-2842 Fax: (626) 445-7564 · Web: http://www. midiman. net · Email: info@midiman. net UK: Unit 22, Harrogate Business Park · Freemans Way · Harrogate · N Yorks · HG3 1DH · England Tel: 44 1423 886692 · Fax: 44 1423 886693· Email: midimanuk@compuserve. com Germany: Kuhallmand 34 · D-74613 Ohringen · Germany · Tel: 49 7941 98 7000 Fax: 49 7941 98 70070 · Web: http://www. midiman. de · Email: info@midiman. de [. . . ]