No Sales Tax For Customers Outside Of California. This Supro S6420 Thunderbolt came to us with a changed speaker, so we dropped in a Jensen C15N from 1966 to round out what was otherwise one of the nicest Thunderbolts I've found.  For some reason, every one we've had prior has been beat up,...

The following specs were carefully collected and recorded by a skilled technician. For a more detailed description and questions regarding sound, feel, or cosmetic condition, please call to speak to one of our experts. SummaryHead/Combo/Cabinet: CombosAmp Electronics: Tube AmpSpeaker Configuration:...

1961 Thunderbolt S6420 in very good condition with very few signs of wear throughout the amplifier. The speaker and transformers are original and this amplifier has recently been professionally serviced and functions properly. This amp runs with a pair of 6L6s, a 5U4 tube rectifier, two 12AX7s and...