Marshall 900 / 4100 Series 100 Watt Amps

These Retube Kits are for the 100 Watt Marshall 900 / 4100 series Amps including the 4100, 4101 and 4102 models using 5881 power tubes.

 A very small number of the 4100 series amps produced from 1990 thru 1991 used EL34's. If your 4100 series Marshall came with EL34's or the amp has been modded to use EL34's (Screen grid resistors & bias resistor swap) then please use the kits for the 2100 series amps.

The last option allows you to fully customize a kit exactly the way you want!