This is the Lexicon MPX R1 MIDI Remote Controller, one of the most robust, road ready pedal boards you can own with built in expression pedal. All in excellent condition and perfect working order including phantom cable and power supply. It's possibly the most sophisticated, feature rich and easy to program and operate MIDI remote controller.

External control inputs: 1/4” TRS jack supports up to 3 on/off switches 1/4” TRS jack for external expression pedal

With all the MIDI effects of your stage rig and your favourite gear/effects, you’re ready to take your favorite studio effects on the road. Use the R1 as a stand-alone MIDI remote controller.

Manufacturers Description:

• Dual relays for remote switching of as many as 4 amp channels;
• MIDI program select and control;
• Programmable expression pedal with toe switch;
• Dedicated footswitches for TAP tempo and MPX 1 A/B switching;
• All-metal chassis, pedal and switches. The MPX 1 for dedicated reverb combined with studio quality effects – the MPX R1 for expressive control – the perfect choice for studio or live applications.

MPX R1 Preliminary Specifications

Dimensions: 23 in x 8 in x 3 in (WHD) (58.42 cm x 20.32 cm x 7.62 cm)
Weight: 9.5 lbs (4.3 kg)
Construction: all metal chassis, switches and expression pedal
External control inputs: 1/4” TRS jack supports up to 3 on/off switches 1/4” TRS jack for external expression pedal
Internal relays: 1/4” TRS  jack connected to two internal programmable relays
MIDI: MIDI OUT/REMOTE: 7-pin DIN connector (compatible with standard 5-pin MIDI) provides phantom power and two-way MIDI communication with the MPX 1. MIDI IN: standard MIDI IN can also be
used to merge a second MIDI input stream when MIDI OUT/REMOTE is connected. MIDI THRU: can be set to pass MIDI from either MIDI IN or REMOTE ports.
Power: 9 VAC,1A wall transformer; 25’ 7-pin DIN cable for phantom power via MPX.
Expression pedal: Vintage mechanical design, all steel construction, programmable toe switch
Display: 3-digit LED indicates program number and tempo rate
MIDI functions: MIDI bank and program select for up to 300 programs. Switches and pedal(s) can be individually set to transmit any controller on any channel. The status of each MIDI switch is indicated
with a green LED Tap tempo can be transmitted as MIDI Clock
Relay mapping: When connected to an MPX 1 via 7-pin DIN cable, LEDs automatically display the following each time a new program is loaded:

• Program number
• Master Bypass state
• A/B state
• Tempo rate

You can view the manuals for the MPX R1 via the link below;

http://www.lexiconpro.com/system/documents/1114/original/prelim.pdf?1340213503

Please note this controller will work with any standard MIDI protocol and devices.