1964 Vox AC50/4 Mk II Big Box Vintage Tube Amp Head Gray Panel JMI UK, AC50

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Up for sale, a Vox AC50/4 Mk II "Big Box" tube amplifier head in excellent condition and in perfect working order. An uncommon transitional amp only offered briefly in '64, this UK made JMI AC50 still retains the GZ34 rectifier of the earlier small box versions, as well as sporting the combination of the early brown lattice grillcloth paired with a (new for '64) gray faceplate. Essentially the same as the Mk I AC50 circuit with a second set of inputs and second channel, the big box version for '64 is a real powerhouse. The dual EL34 design has plenty of British sizzle and chime, with big, bold overdrive when you dime it out. And yes, this amp pairs exceedingly well with your favorite Rickenbacker or Gretsch Tennessean if you want the iconic British Invasion sounds of you know who.

The circuit has been thoroughly serviced and left original in all the ways that count, with stock output and power transformers and a recap of the power supply to ensure that everything is operating within original factory spec. The pots have been replaced with new Alphas that turn smoothly and work reliably. A new Hammond choke is also present inside the chassis. The gray metal faceplate retains all of the original graphics, with all six of the stock chicken head knobs.

The head cabinet retains the original black basketweave tolex paired with the original brown lattice diamond grillcloth and gold piping. The jacks on the stock back panel have been converted from the original three-pin variety to a more conventional 1/4" configuration. Other small yet meaningful original bits include the plastic handle, raised Vox logo, and model/serial number badge on the back. The corners are vintage two-pin replacements.

Product Specs

Excellent (Used)
AC50/4 Mk II
Black Basketweave
Guitar Heads
Made In
United Kingdom

About The Seller

Mike & Mike's Guitar Bar
Joined Aug 2013
Seattle, WA, United States


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Available for local pickup from Seattle, WA, United States

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We use industrial 1/2" bubble wrap as well as 1" hard foam and double walled boxes where applicable to make sure your purchase arrives safely. Strings are detuned, switch tips and endpins packed separately, and all usual precautions taken to ensure that our instruments and amps arrive exactly as described.

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This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.

Mike & Mike's Guitar Bar

Seattle, WA, United States
Joined: Aug 2013

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