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King-sized Orange Tone in the USA

A classic British amplifier company finally makes its way over the pond! The Orange MK Ultra Marcus King Signature Head marks a first for Orange, being designed and built in the United States. This 30-watt, handwired amplifier represents a fresh new formula for Orange — it is not voiced after or designed to replicate any amp from their storied past, instead representing a bold new tonal direction that was devised in collaboration with Grammy-nominated artist Marcus King. Like the genre-defying sound of its namesake, the MK Ultra offers a wealth of tones that cover everything from warm jazz to all-out crunch, with articulate pedal-ready cleans when turned down low and beautiful high-gain saturation when cranked. What’s more, the highly interactive 3-knob controls are voiced by Marcus to be touch responsive and offer stage-ready sounds in any combination, removing the need for endless setup and knob twiddling.

Intuitive 3-knob design

Perhaps the most surprising element of the MK Ultra’s design is the simple 3-knob layout, comprised of Volume, Sing (treble), and Deep (bass) controls. Built to provide exceptional tonal versatility without endless knob adjustments, these controls are all highly interactive with each other, rewarding those who like to take the time to explore their idiosyncrasies.

Volume: Just like a volume control on a guitar, this knob is just as useful as a tone-shaping tool. The MK Ultra’s Cathode biased design offers a quick, direct attack on lower settings, making it perfect for at-home recording as a pedal platform. As you increase the volume, the MK Ultra reacts as every great tube amp should, with an increased spongy saturation that's easily dialed down with your guitar’s volume control.

Sing/Deep: These are essentially the same as a treble/bass control on a typical amplifier, but the frequency range of the MK Ultra was specifically voiced for Marcus so that almost any tonal combination is usable — in the words of Orange: “it’s impossible to dial in a bad sound!”


This one-of-a-kind circuit design features EQ controls in different parts of the circuit that are totally independent. The specific ranges and frequencies of these controls were voiced for Marcus, making it impossible to dial in a bad sound.


Preamp: 2 x 12AX7 (ECC83)
Power Amp: 2 x 6L6GC

Controls (right to left):

Input, Sing (Treble), Volume, Deep (Bass), STBY (Warmup), Power

Output Power:

30 Watts RMS

Speakers outputs:

1× 4 OHM or 2 X 8 OHM / 1 x 8 or 2 x 16OHM / 1 x 16 OHM

Unboxed Dimensions (W x H x D):

55cm x 27cm x 24cm (21.7″ x 10.6” x 9.5″)

Unboxed Weight:

17.8 kg (39.2 lbs)

Orange MK Ultra Marcus King Signature 30-watt Tube Amplifier Head:

  • Completely original new amplifier design, designed and built in the USA
  • Created in collaboration with Grammy nominee Marcus King
  • 30 handwired watts of British-meets-American amplifier power
  • Touch-sensitive response that’s highly reactive to your guitar’s tone and volume controls
  • Simplified but incredibly interactive 3-knob setup that rewards tonal exploration
  • Custom American-made Heyboer transformers

At A Plus Guitars, we strive to make your buying experience as pleasant as possible, and to give our customers the high-quality instrument and service that they are looking for. We take great pride in our shipping...both the packaging and the speed. We want to get your instrument to you as quickly as possible AND in great condition! We are also proud to be a featured Eastman dealer...We are THE place to find Eastman! Email: Phone: (304) 842-8510.


Orange MK Ultra Marcus King Signature 30-Watt Tube Amp Head

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