I have a Line 6 Spider V 30 MKII and frankly I'm very disappointed with it - at least for my purposes. I'm looking for very clean boost in the mids, and reduce the highs. It's a home modeling amp, true, and likely I set my expectations too high reading the promo marketing info. It seems the modeling adjustment sound muddy. On the other hand it produces fantastic distortion and the like.
Someone, somewhere, I don't remember, talked a good upgrade was to replace the stock speaker. I've even heard with amp a speaker upgrade is nice fix. Example: I read the difference for one of the Fender vintage tube amps is it had JBL speakers.
My question to the forum is it worth changing the speaker, and please suggest brand/model. I understand the more expensive Spider V's have a tweeter. Maybe a speaker with a mid range/tweeter crossover. I used to be into stuff like that but it been so long I don't remember much.
I also have a Fender LT50 that I feel sounds better (not great), but the modeling capabilities don't compare to the 30 MKII. I may look at modding the LT50 instead and sell the Spider V 30 MKII.