The Silver Jubilee Series was created in 1987 to celebrate the 25th anniversary of the founding of Marshall Amplification and the 50th year of Jim Marshall being in the music business, hence the Silver Jubilee's original '25/50' designation. The limited edition all-valve Silver Jubilee amplifiers looked stunning in silver vinyl covering with chrome-plated control panel. Based on JCM800 2203 and 2204 Master Volume models, the Jubilee amplifiers were the first Marshall products with Pentode/Triode switching, which halves power output. The Jubilee Series featured an innovative, if somewhat unusual, preamp circuit which had three gain 'modes': 'Clean', Rhythm Clip, and foot-switchable Lead Channel.
- Accessories: Footswitch, speaker and power cable
- EQ: In put Gain (Pull Rhythm Clip), Lead Master, Output Master, Treble, Middle, Bass, Presence, Pentode/Triode Switch
- Model: 2555X
- No. of Channels: 2
- Outputs: FX Loop, DI Output
- Total Power: 100w
- Tube: 3 x ECC83, 4 x EL34
- Type: Tube