Marshall Silver Jubilee Schematics

To celebrate 25 years of Marshall amps and for Jim Marshall being in rock ‘n roll for 50 years, the Silver Jubilee amps were introduced in 1987. This explains the model number 2550 (25/50) and name Silver Jubilee (25th Anniversary). The 1987 amps and cabinets were covered with silver vinyl and had chrome silver panels instead of the usual gold brushed aluminium panels. In the following years these amps were manufactured in the normal black vinyl, but the chrome panels stayed.

These amps could be switch­ed to “half” power by switch­ing the output pentodes to triode mode. The model no. “25/50” is also a reference to this feature. Not many people actually use this “feature” as the sound in triode half power mode isn’t as desirable as it is in pentode full power mode.

In 1996 a limited edition (of 3000 amps) Slash Signature of the 2555 amp (and cabinet) was reissued.

2550 Silver Jubilee, 50W/25W head

Handbook for the 25/50 Custom Series.

Schematic with 3x ECC83 & 2x EL34, (Marshall, 1988).

Schematic of the PSU, (Marshall, 1988).

2553 Silver Jubilee, 50W/25W “Mini Stack” head

The 2556A & 2556B and the 2556AV & 2556BV “Mini Stack” cabinets were meant to be used with this head.

Handbook for the 25/50 Custom Series.

Schematic with 3x ECC83 & 2x EL34, (Marshall, 1988).

Schematic of the PSU, (Marshall, 1988).

2554 Silver Jubilee, 50W/25W 1×12″ combo

The 2554 combos were fitted with one 12″ Celestion G12 Vintage T3896 8Ω speaker.

Handbook for the 25/50 Custom Series.

Schematic with 3x ECC83 & 2x EL34, (Marshall, 1988).

Photograph of a black 2554 combo (thanx to Mark Houghton for the pic).

2555 Silver Jubilee, 100W/50W head

Handbook for the 25/50 Custom Series.

Schematic with 3x ECC83 & 4x EL34, (Marshall, 1988).

Schematic of the PSU, (Marshall, 1988).

Photograph of a silver 2555 half stack.

2558 Silver Jubilee, 50W/25W 2×12″ combo

These combos were fitted with two 12″ Celestion G12 Vintage T3897 16Ω speakers.

Handbook for the 25/50 Custom Series.

Schematic with 3x ECC83 & 2x EL34, (Marshall, 1988).

Schematic of the PSU, (Marshall, 1988).

Photograph of a silver 2558 combo.

2551A, 4×12″ 300W 16Ω cabinet, angled front.

These 1960A style cabinets were fitted with four 12″ Celestion G12T-75 speakers. Most of these 2551A cabinets have an impedance of 16Ω but 8Ω cabinets have been reported too.

2551B, 4×12″ 300W 16Ω Cabinet, straight front.

These 1960B style cabinets were fitted with four 12″ Celestion G12T-75 speakers. Most of these 2551B cabinets have an impedance of 16Ω but 8Ω cabinets have been reported too.

2551AV, 4×12″ 280W 8Ω cabinet, angled front.

These 1960AV style cabinets were fitted with four 12″ Celestion G12 Vintage T3896 8Ω speakers.

2551BV, 4×12″ 280W 8Ω cabinet, straight front.

These 1960BV style cabinets were fitted with four 12″ Celestion G12 Vintage T3896 8Ω speakers.

2556A, 2×12″ 150W 8Ω “Mini Stack” cabinet, angled front.

These mini stack cabinets were fitted with two 12″ Celestion G12T-75 T3760 16Ω speakers.

2556B, 2×12″ 150W 8Ω “Mini Stack” cabinet, straight front.

These mini stack cabinets were fitted with two 12″ Celestion G12T-75 T3760 16Ω speakers.

2556AV, 2×12″ 140W 8Ω “Mini Stack” cabinet, angled front.

These mini stack cabinets were fitted with two 12″ Celestion G12 Vintage T3897 16Ω speakers. It is said that these cabs are very rare.

2556BV, 2×12″ 140W 8Ω “Mini Stack” cabinet, straight front.

These mini stack cabinets were fitted with two 12″ Celestion G12 Vintage T3897 16Ω speakers. It is said that these cabs are very rare.

See the Marshall Silver Jubilee history page for some more information on these 25th anniversary amps.