Marshall JCM900 SL-X Schematics

The JCM900 SL-X serie amps were introduced in 1993 and discontinued in 1999. SL-X means as much as Super Lead eXtended. They’re also called the MkIV Master Volumes.

2100 SL-X JCM900 Master Volume, 100W head

These amps were fitted with either 4x EL34 or 4x 5881 output tubes.

Schematic of the pre amp with 3x ECC83, SLXa-61-02 Issue 5, (Marshall, 1994).

Schematic of the PSU, 2100-60-02 Issue 9, (Marshall, 1995).

Schematic of the power amp with 1x ECC83 & 4x EL34, 2100-60-34 Issue 10, (Marshall, 1995).

Schematic of the Power amp with 1x ECC83 & 4x 5881, 2100-60-58 Issue 9, (Marshall, 1995).

Owners manual for the JCM900 4100, 4101, 4102, 4500, 4501, 4502, 2100 SL-X & 2500 SL-X amps.

2101 SL-X JCM900 Master Volume, 100W 1×12″ combo

These amps were fitted with either 4x EL34 or 4x 5881 output tubes.

Schematic of the pre amp with 3x ECC83, SLXa-61-02 Issue 5, (Marshall, 1994).

Schematic of the PSU, 2100-60-02 Issue 9, (Marshall, 1995).

Schematic of the power amp with 1x ECC83 & 4x EL34, 2100-60-34 Issue 10, (Marshall, 1995).

Schematic of the Power amp with 1x ECC83 & 4x 5881, 2100-60-58 Issue 9, (Marshall, 1995).

Owners manual for the JCM900 4100, 4101, 4102, 4500, 4501, 4502, 2100 SL-X & 2500 SL-X amps.

2500 SL-X JCM900 Master Volume, 50W head

These amps were fitted with either 2x EL34 or 2x 5881 output tubes.

Schematic of the pre amp with 3x ECC83, SLXa-61-02 Issue 5, (Marshall, 1994).

Schematic of the PSU, 2500-60-02 Issue 11, (Marshall, 1995).

Schematic of the power amp with 1x ECC83 & 2x EL34, 2500-60-34 Issue 13, (Marshall, 1995).

Schematic of the power amp with 1x ECC83 & 2x 5881, 2500-60-58 Issue 12, (Marshall, 1995).

Owners manual for the JCM900 4100, 4101, 4102, 4500, 4501, 4502, 2100 SL-X & 2500 SL-X amps.

2501 SL-X JCM900 Master Volume, 50W 1×12″ combo

These amps were fitted with either 2x EL34 or 2x 5881 output tubes.

Schematic of the pre amp with 3x ECC83, SLXa-61-02 Issue 5, (Marshall, 1994).

Schematic of the PSU, 2500-60-02 Issue 11, (Marshall, 1995).

Schematic of the power amp with 1x ECC83 & 2x EL34, 2500-60-34 Issue 13, (Marshall, 1995).

Schematic of the power amp with 1x ECC83 & 2x 5881, 2500-60-58 Issue 12, (Marshall, 1995).

Owners manual for the JCM900 4100, 4101, 4102, 4500, 4501, 4502, 2100 SL-X & 2500 SL-X amps.

2502 SL-X JCM900 Master Volume, 50W 2×12″ combo

These amps were fitted with either 2x EL34 or 2x 5881 output tubes.

Schematic of the pre amp with 3x ECC83, SLXa-61-02 Issue 5, (Marshall, 1994).

Schematic of the PSU, 2500-60-02 Issue 11, (Marshall, 1995).

Schematic of the power amp with 1x ECC83 & 2x EL34, 2500-60-34 Issue 13, (Marshall, 1995).

Schematic of the power amp with 1x ECC83 & 2x 5881, 2500-60-58 Issue 12, (Marshall, 1995).

Owners manual for the JCM900 4100, 4101, 4102, 4500, 4501, 4502, 2100 SL-X & 2500 SL-X amps.