Mastering Massive Passive Retube Kit Version A
This kit is only for Manley MASTERING MASSIVE PASSIVE's with the serial number falling between MMMSMP000 - MMMSMP870. Includes (2x) 5814 or 12AU7 tubes for input, and (4x) 6414 or 12BH7 tubes for driver output. Be aware that some tube brands are subject to change over time and may not match the pictures shown.