Dating vintage jensen speakers

01-Nov-2019 05:02

The date of entry into the Celestion log book is 6th May 1966 (see Michael Doyle – ‘History of Marshall’ book – p137), however they were definitely made earlier than this.Marshall were using them in 4×12 cabs by late 1965, and I once owned one dated March 1965.*Power handling increased by 5 watts around late 1967 due to a change in the voice coil design.The T1134 model was probably the first ‘G12H’ speaker Celestion ever made.

The G12H and G12M speakers are the most popular Celestion greenback models.The log book entry for T1217 does confirm this: “as T1134 but with new type pressure housing”.