I understand. Nelson Pass owned Threshold and designed all of the their amps until the end of 1991 when he left to start Pass Labs. More than a dozen of the amps designed and marketed during that time were Class A.
You should also expand your search to include early Forte amps. Forte was Threshold's "budget" line, budget being a relative term only in comparison to the Threshold line. Mr. Pass still waived his magic wand over the Forte amps, and the family resemblance in design, build, and performance is unmistakable. The Model 1, 1a, and 3 are all Nelson Pass designs, sound excellent, and can be had for much less money than a similarly-powered Threshold amp. I own several Forte amps, including two Model 3's, and can attest to their build quality and sound.
