Marshall 900 2100 SL-X

These Retube Kits are for the 100 Watt Marshall 900 series 2100 SL-X Amps.

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

The default power tubes are the JJ Electronic E34L’s but you can configure this kit to use the JJ EL34’s, KT77’s, Big Bottle 6CA7’s or the JJ 6L6GC's if your amp came with 5881's by clicking on the "Customize" button. If your SL-X came with 5881's then we recommend you use the JJ 6L6GC's unless your amp has been modded to use EL34's (Screen grid resistors & bias resistor swap).