I'm planning to buy some Celestion F12 - X200 speakers for my guitar cabinets ( 112 and 212). Are there any users out there who can tell me more about the pros and cons of this speaker. I saw, and heard and red, Amazing things on Youtube. But... I heard one in a 1x12 cab and it sounded like a broken radio speaker - maybe it was stuck. I'm looking for experiences and advice. Thanks in advance.