DC-8 Dual multi-keyboard power supply for 8 keyboards

Introducing the MTR DC-8 Dual multi-keyboard power supply

An essential addition to any music classroom, the DC-8 Dual multi-keyboard power supply eliminates the need for frustrating keyboard adaptors extension cables. Regulated and highly effective, featuring a 9 volt DC power supply designed to power multiple keyboard.

Versatile, regulated and highly efficient

Safe, sturdy and reliable, the DC8 is designed to power both Yamaha and Casio keyboards and is perfect for use on the stage and in the studio. Use the DC to DC cables (8 supplied) to connect your keyboards to one unit, taking your concern away from cables and safety, allowing you to focus on what matters.

The unit can also be used with wireless microphones, guitar foot pedals and more. Please just ensure the polarity, voltage and DC socket size are compatible. The unit is capable of driving continuously 8 medium sized keyboards. The polarity of the outputs is factory pre-set to the Yamaha and current Casio standard. This can be easily changed internally to the opposite polarity.

Please note that the old Casio keyboards up to 2013 were made with centre pin negative, please be certain that this psu is set to the correct polarity, or damage might occur. For units from 2013 on, the polarity is the same, centre pin positive, which is how this DC8-DUAL is set. Casio use 3 different sizes of DC plug, custom leads are available for each model.

Red lead = centre pin positive (Yamaha / Casio)

Green Lead = Centre pin negative (old Casio)

The lead fitted to the front panel to the left of the outputs provides an instant indication of the way the polarity has been set, as above. This led is white when the unit is switched off. The DC-8DUAL produces 4.2 amps of fully regulated power, with each output designed to deliver ½ an amp. Very large keyboards with big LCD displayers and disc drives could take up to 1 amp each: do not overload this unit, instead connect only 4 or 5 keyboards to each DC-8DUAL. This unit’s design offers up to 90% efficiency.

Changing polarity

Remove the lid – two screws, and don’t loose the small shake-proof (crinkled) washer as this ensures earth continuity between the lid and base.

At the right hand edge of the DC socket circuit board are two screw terminals into which the yellow (or black/ red) wires from the power module are fitted. To reverse the polarity, undo these two screws, pull out the wires and refit them in opposite terminals. Then, re-fit the lid. When switched on again, the front panel led will have changed colour from red to green. They are factory-set to centre pin +.

Connections and use

1. Plug the Eurolead into the rear panel mains socket, and the 13 amp 3 pin plug into a suitable power outlet. Use the eight 3 metre DC leads supplied to connect keyboards DC power sockets to the 8 front panel outputs.
2. If a fault should develop, the unit will go into ‘hiccup’ mode and recover automatically after the fault condition is removed. Examine carefully all DC leads for shorting, and damage to the DC plug. Suspect leads should be discarded.

List of compatibility

YPT-200
YPT-210
YPT-220
YPT-270
YPT-370
PSR-E203
PSR-E213
PSR-E223
PSR-E233
PSR-E243
PSR-E273
PSR-E303
PSR-E313
PSR-E323
PSR-E333
PSR-E343
PSR-E360
PSR-E373
PSR-E403
PSR-E413
PSR-E423
PSR-E433
PSR-E473
PSR-EW310
PSR-EW425
PSR-F52
EZ-200
EZ-220
EZ-300
DD45
PSR-125
PSR-175
PSR-195
PSR-450
PSR-295
PSR-170
PSR-172
PSR-190
PSR-195
PSR-201
PSR-202
PSR-260
PSR-262
PSR-273
PSR-280
PSR-282
PSR-290
PSR-292
PSR-293
PSR-350
PSR-403
PSR-550
PSR-A500
PSR-SX600
PSR-SX700
PSR-SX900
PSR-I300