Electro Harmonix replacement tubes kit for the Marshall 900 series (all models that shipped with EL34 tubes). Special selection set, selected for best crunchy clean channel and hand selected punchy high gain power tubes set. Hand selected high gain tubes set. The set includes the following tubes:
2x 12AX7 EH
1x 12AX7 EH Balanced
4x 6L6GC EH Platinum Matched
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