Up for sale is a Mesa Boogie Road King 120 Watt all tube combo amp with the original footswitch. What makes this Road King unique from the others is that this unit has MIDI channel switching.
If you are looking at this you probably know that this Amp is the best of the best. If not than go to the Mesa Boogie web site or YouTube has some great intro videos.
In a few words, unlike most of the multi-channel guitar amps, this unit is 4 individual amps. In most other amps, you are controlling the pre-amp to get your tone, but you can’t change the power amp side of the amp. That is where the Road King is different. In the back you have the ability to change the tube configurations to select the proper power amp section (for Fender, Marshall, Rectifier and other combinations).
Why is having the MIDI control for switching the channels so important? In my rig I used this amp along with the TC Electronics G-Major effects process. By setting up the MIDI interface, I was able to hit one path to change from on sound to the next sound. 
With using the King Kontroller, I had to hit two foot switches. One would change the channel on the Road King and another footswitch to change my effects on the G-Major. Not only was I doing a dance, but there was a delay in switching, which affected the music.
For Reference, MIDI device channel is 16, the program change is 19 for channel CH1, 18 for CH2, 21 for CH3 and 25 for CH4 (Note FCB101 foot switch starts at 1 where the FootSim doc starts at 0)
There is also one other thing to mention about the Road King that is left out of other ads. With the Road King you the ability to run two speaker cabinets. The combo has 2x12 speakers in the in the combo shell (great for Fender Twin type sound). In my rid I also used a bottom JMC-900 Marshall 4 x 12 cabinets. As you see in the picture using the bottom cab allows the Road King on top
Included in the sale: 
The Road King Combo amp, King Kontroller foot control, the FootSim box mounted inside the Road King, Four ¼ inch patch cables, 9vt power transformer (for the FootSim) and copies of both manuals.
   
 Here is a summary specs:
Quick Overview
Wattage Multi-Watt™ 50, 100 or 120 (Channel Assignable)
Power Tube Type 4x6L6 & 2xEL-34 with Progressive Linkage™
Channels & Modes 4 Channels / 12 Modes
Mode Voicing’s / Styles Ch. 1 = Clean, Fat or Tweed
Ch. 2 = Clean, Fat or Brit
Ch. 3 = Raw, Vintage High Gain or Modern High Gain
Ch. 4 = Raw, Vintage High Gain or Modern High Gain
Additional Features Reverb, 2 FX Loops, Solo
Foot switchable Functions   Ch. 1, 2, 3, 4, Solo, Reverb, FX Loop 1 & 2, Mute
Speaker(s) & Impedance 2 - 16 Ohm Celestion Custom 90 / Total Load = 8 Ohms
Weight 98 Lbs.
Dimensions 22 1/8" H x 28 1/2" W x 12 1/8" D
Format 2x12 ComboLocal Houston Area Buyers:
Pickup is available for local buyers. Fund must be transferred to PayPal prior to pick up or cash only for paying at pick up.Non-Houstonian US Buyers:
Shipping will be with UPS, with Protection Plan and Store Packing (Pack & Ship Guarantee). Note the weight and dimensions in Quick Overview.INTERNATIONAL BUYERS:
Buyers are responsible for any fees/duties or costs involved in receiving the item(s). General Conditions of sale
The buyer is to contact me within 2 days after the end of auction. I expect payment within 5 calendar days through PayPal. Please contact me for any questions or method of payment.If you have any questions, please ask before you make the purchase.
The amp will be shipped within 2 working days of receiving payment.