• Country
• Great Britain (UK)

• Manufacturer / Brand
• Marshall (Brand), Marshall, J & T, (Musical Instruments) Ltd.; Hanwell & Bletchley

• Year
• 1995–1997

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 353853

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 5

• Valves / Tubes
• ECC83 ECC83 ECC83 5881 5881

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Audio-Amplification; ZF/IF - kHz

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 120/230 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 28 cm = 11 inch

• Power out
• 30 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Guitar Amplifier JTM30 Series [JTM312, 30W 1×12″ combo] - Marshall Brand, Marshall, J &

• Shape
• Console with any shape - in general

• Dimensions (WHD)
• 560 x 470 x 245 mm / 22 x 18.5 x 9.6 inch

• Notes

• JTM312, 30W 1×12″ combo

  This amplifier was in pro­duction from 1995 to 1997.
  It used three ECC83 tubes and two Sovtek 5881 tubes. It offered 2 foot switchable channels with a shared EQ section, a spring reverb, a series FX loop, and a Speaker-emulated output.

  Fitted with a 12″ Celestion Marshall G12 Heritage T4612 16Ω (S403) speaker.

  Extension Cabinet: Compatible with JTMC12 extension cabinet (sold separately)

  Used the same chassis as the JTM310 which included two Eminence Marshall Heritage LE10-508 8Ω speakers 

• Net weight (2.2 lb = 1 kg)
• 17 kg / 37 lb 7.1 oz (37.445 lb)

• Price in first year of sale
• 800.00 DM

• Literature/Schematics (1)
• - - Manufacturers Literature

• Literature/Schematics (2)
• -- Original-techn. papers.

• Author
• Model page created by Marcel Kneip. See "Data change" for further contributors.

• Other Models

• Here you find 21 models, 20 with images and 6 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Marshall (Brand), Marshall, J & T, (Musical Instruments) Ltd.; Hanwell & Bletchley