I can reassure all the speaker is the weakest link in this case. I used the direct out (which bypasses the installed speaker) into a Tech 21 Power Engine 2x12 and all the buzzy/fizzy high end disappeared. Just bought the amp on New Years Eve but it is going back. To invest in a better speaker is out of the question. Once again, still after decades in this game, Line 6 still lollipopting the bed where it really counts.