Yes, all guitar amp speaker cabs are un-powered. I was just noting that Speaker Cab and Extension Cab are synonymous and interchangeable.
The term "Extension Cab" is often used by a company to describe a "Speaker Cab" that matches a certain model of amplifier.....like your Traynor for example.
All speakers have a Power Rating. It TVhas nothing to do with how they sound, or how "loud" they are. The power rating is simply a spec of how much power (in watts) a speaker coil can "safely" handle.
A Celestion V30 is rated at 60 Watts. Show it more power than that, (80 watts for example) and you risk over-heating and ruining the voice coil...the speaker will sound bad at that point, or may be completely dead.
If a power cord (extension cord) can take 6 Amps, but you run 8 amps through it, the cord will overheat and eventually burn up. The speaker voice coil rating (in watts) is very similar.
Speaker power ratings Are Not additive. They are a product of the lowest rated speaker.
If you have 2 speakers in a cab...one is rated at 15 watts, and the other at 100 watts, you do not have a 115 watt cab, you have a 30 watt cab. Assuming you are using speakers of the same Impedance (both 8 Ohm or both 16 Ohm for example) it will not matter if the speakers are connected in parallel or in series. The Power/Current will divide evenly among the two speakers. So you always rate a cab at two times its lowest powered speaker.
So...a cab with 2 speakers...one rated at 20 watts, and one rated at 60 watts...your cab can safely handle (2x20) 40 Watts.
Hope that helps. (hope I did not make any math errors)
best
