Dating vintage jensen speakers
Ceramic speakers (aka ‘greenbacks’) first appear around late 1964 to early 1965.
They have a slightly more aggressive tone compared to the alnico magnet speakers.
*Power handling increased by 5 watts around late 1967 due to a change in the voice coil design.
Marshall were using them in 4×12 cabs by late 1965, and I once owned one dated March 1965.The log book entry for T1217 does confirm this: “as T1134 but with new type pressure housing”.T1221 is Celestion’s most legendary speaker – the classic G12M speaker with the 75Hz cone.Shipping rate is for items shipped to the lower 48 states only.*** INTERNATIONAL BUYERS: PLEASE CONTACT US BEFORE PURCHASE SO WE CAN GIVE YOU THE MOST ACCURATE SHIPPING QUOTE!