Has anyone tried these speakers with a GK 1001rb head? I am curious about the combination, and this site seems to have a large pool of knowledgeable tone freaks. By the way, to realize my dream for a new cabinet, I am selling my SWR Super Redhead (2000 model) for 800 plus shipping if anyone is interested in a superb combo for small to medium size venues. The sound of this amp miked in the studio really stretches the tape with fat yet uncolored tone. It brings out every nuance of my MTD 535.