Electro Harmonix replacement tubes kit for the Marshall 900 series (all models that shipped with EL34 tubes). Special selection set: uses KT77 tubes for enhanced clarity and warm smoothness. Hand selected high gain tubes set. The set includes the following tubes:
2x 12AX7 EH
1x 12AX7 EH Balanced
4x JJ KT77 Platinum Matched
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