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JMI 30/6 TB main image

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JMI 30/6 TB

JMI 30/6 TB

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Page last updated Aug 11, 2025

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Description

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This is the most celebrated version of the legendary Jennings Musical Industries amplifier, with features based on a 1961/62 design.

The combo features the classic design using brown grillecloth, black tolex covering (beige/fawn option also available), leather strap-type handles and two 12” Alnico Blue speakers.

The amp’s chassis includes the traditional red JMI control panel, point-to-point wired circuitry, three channels and six inputs (Vib/Trem, Normal, Brilliant), with an option of the classic Top Boost add-on circuit.

Control layout: Vib/Trem Speed, Vib/Trem Volume, Normal Volume, Brilliant Volume, Cut (tone), Top Boost (optional), Bass, Treble Valve configuration: ECC82 (x1), ECC83 (x 4), EL84 (x4), GZ34 (x1) (Top Boost option features an extra ECC83) Wattage: 30W Speaker Options: Available with either Blue Alnico or Celestion Green Back Speakers Variable mains voltage selector

Product specs

Amp Type

tube

Videos

Tonecast

The Best AC30 Nobody Wants

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The Best AC30 Nobody Wants

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Video thumbnail for Gearfight: Matchless HC30 vs JMI AC30/6TB by Tonecast

Gearfight: Matchless HC30 vs JMI AC30/6TB

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