Massive Passive Retube Kit Version A
This kit is only for Manley MASSIVE PASSIVE's with the serial number falling in between MSMP000 - MSMP999. Includes (2x) 5751 tubes for input, (4x) 12BH7 or 6414 tubes for driver output. Be aware that some tube brands are subject to change over time and may not match the pictures shown.
UPDATE: We have replaced 6414 tube with 12BH7EH type as of October 2013 on most of our products. There are limited quantities of 6414 GE or RAYTHEON so 12BH7EH is what will ship by default.