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1962-1963 JMI Vox AC30/6 Top Boost - $4,950 (Belterra)
condition:
good
make / manufacturer:
JMI Vox
QR Code Link to This Post
Description:
Up for sale is a stunning piece of vintage history: a 1962-1963 JMI Vox AC30/6 Top Boost amplifier, handcrafted by Jennings Musical Industries in the UK. This all-original gem features the iconic Top Boost circuit, delivering that classic British Invasion chime made famous by The Beatles, The Shadows, and more. The amp was serviced by renowned amp technician Bill Webb in Austin, TX, this amp is in excellent working condition and sounds absolutely incredible—ready to rock your next gig or studio session!
Key Features:
Authentic JMI Construction: Built with the original grey panel, “A J/M/I Product” stamp, and hand-wired tagboard circuitry, dating it to late 1962 to early 1963.
Top Boost Circuitry: Includes Brilliant, Normal, and Vib-Trem channels with a dedicated Brilliant tone knob, offering versatile tones with enhanced treble response.
Speakers: Original Celestion Alnico Blue speakers, featuring the iconic silver finish and renowned for their warm, punchy tone in early 1960s AC30s.
Tubes: Features four EL84 power tubes and a GZ34 rectifier, all in working order post-service. Not original tubes.
Transformers: Original JMI transformers, preserved for authenticity and reliability.
Serviced by Bill Webb: Professionally serviced by Bill Webb, a highly respected amp tech in Austin, TX. Service included tube checks, bias adjustment, and capacitor replacements as needed to ensure peak performance.
Condition: All-original construction with minor cosmetic wear (scratched panel, dusty speakers, worn tube chart label), but fully functional with great sound. No major repairs or modifications.
Notes:
Serial Number: No visible serial number on the chassis or cabinet, but the JMI branding and design confirm its authenticity. This is a minor collector note and does not affect playability.
Sound: Tested and sounding fantastic—clean tones are crisp, and the vibrato effect adds vintage magic. Video demo included below!
Provenance: A well-maintained piece of vintage gear, now revitalized by a top-tier technician.
Included:
The amp as shown, with no additional accessories
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More Info - Research
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Models and Years with Integrated Top Boost
Source Grok:
AC30/6 Top Boost (1963–1968)
Model Details: The AC30/6, introduced in 1960, gained the Top Boost circuit as a standard feature by 1963. These amplifiers, often referred to as AC30TBs, had three channels (Normal, Brilliant, and Vib-Trem) with six inputs. The Top Boost circuit, affecting the Brilliant channel, was controlled via treble and bass knobs on the top panel, alongside a tone cut control.
Characteristics: Used ECC83 preamp tubes, EL84 power tubes, a GZ34 rectifier, and typically Celestion Alnico Blue or Greenback speakers. Available in fawn or black vinyl with brown or black diamond grille cloth.
Notable Years: 1963–1964 are considered the "golden era" for integrated Top Boost models due to consistent JMI build quality.
Hear it Here:
https://www.youtube.com/watch?v=86hX5IqBaZA&t=3s