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Orange Marcus King MK Ultra Signature 30W Valve Amp Head

Valve tones fit for a King! Hand wired in the USA.

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Product Description

The MK Ultra was developed in conjunction with Grammy nominated singer-songwriter Marcus King, and is the very first Orange amplifier to be designed and built in the USA. The hand wired 30 watt all-valve guitar amplifier is a completely unique design that offers a new approach to the classic Orange sound. Built using the highest quality components, including American-made custom Heyboer transformers, the MK Ultra pays tribute to King and his signature blend of Southern Rock and Blues.

The MK Ultra's carefully tuned input circuitry responds amazingly well to your guitar's volume and tone settings, delivering a range of expressive and dynamic tones. The preamp section is driven by a pair of 12AX7 (ECC83) valves, while the power section consists of two 6L6GC valves, another first for an Orange amp. At 30 watts, the MK Ultra has plenty of clean headroom making it a fantastic pedal platform, and seamlessly blends them together into the tone instead of sitting on top of it.

Despite being a signature amplifier, the MK Ultra is far from a one trick pony. Fans of Blues, Country, Classic Rock and even Jazz-Fusion will find something in the MK Ultra to inspire them. The simple, three-knob set up is surprisingly versatile and has enough tone-shaping options to keep even the biggest tone-tinkerers happy!

“For me to have a signature amp with Orange is just like a childhood dream that’s come true. It’s a uniquely crafted American amplifier by a British company for a uniquely crafted American Man” - Marcus King

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Key Features

  • Hand Built & Hand Wired -  Every single component is connected from one point to the next. The capacitors and resistors are wired directly to the tubes for a superior tone.
  • Tailored EQ Section - This one-of-a-kind circuit design features EQ controls in different parts of the circuit, and are totally independent. The specific ranges and frequencies of these controls were voiced for Marcus so that it’s impossible to dial in a bad sound!
  • All New Design - This is not a copy of any previous vintage design with some slight modifications. This is a unique design developed specifically for the MK Ultra.
  • All-Valve Construction - You just can't beat a cranked valve amp! As you push the volume control, the power section starts to break up giving you an organic, natural overdrive that is clear and defined.



  • Controls: Input, Sing (Treble), Volume, Deep (Bass), STBY (Warm Up), Power
  • Wattage: 30 Watts RMS
  • Inputs: 1
  • Speaker Outputs: 1 x 4 Ohm or 2 x 8 Ohm / 1 x 8 or 2 x 16 Ohm / 1 x 16 Ohm
  • Channels: 1


  • Amplifier Depth: 24 cm (9.5")
  • Amplifier Width: 55 cm (21.7")
  • Amplifier Height: 27 cm (10.6")
  • Amplifier Weight: 17.8 kgs (39.2 lbs)
  • Effects: None


  • Pre Amp Tubes: 2 x 12AX7 (ECC83)
  • Power Tubes:  2 x 6L6GC

Written by Chris Toft

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It's simple! Just add the products you want to your basket and click the "Checkout" button in your basket. Go through the checkout process and tick the "Finance" option under "Select Your Payment Method". You can then choose which finance term you'd like to apply for, and change your deposit if you wish.

At the end of the checkout you'll be taken to the V12 Finance web site. This is where your finance application is processed. Assuming your application is accepted you'll be able to place your deposit and confirm your order right there.

Then, your order will come through to Andertons and we'll send you the goods. Get approval before 3pm and we'll send your order out the same working day (stock permitting) for next working day delivery!

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You must: spend over £300, be at least 18 years of age, have been a UK resident for 3 years or more, be able to make repayments by Direct Debit, be in regular employment (minimum of 16 hours per week) including self-employment, or in permanent residence with your partner who is in regular employment.

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Andertons Music Company's Registered Office: 58-59 Woodbridge Road, Guildford, GU1 4RF. Andertons Music Company acts as a credit broker and not a lender and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Andertons Music Company is authorised and regulated by the Financial Conduct Authority, firm registration number 716155. Credit provided subject to age and status.