This is from the Weber site describing the speaker I put in.
Replacement for Oxford 6EV in tweed Champs and other amps using 6" speakers
6", 16oz ceramic magnet, 15 watt, 1" voice coil, smooth cone.
Warm, crunchy, early breakup, aggressive.
Will fit in early tweed Champ (w/6" speaker).
It is available in 4 or 8 ohms. I ordered the 4ohm one which is what the stock speaker in my new amp was.
Thanks for looking out though