There are some Threshold amps ( Pass) listed. The S/200 and S/300 would be worth a try. BTW, I have owned Threshold gear many moons ago!
https://www.hifishark.com/search?q=threshold
This is a nice one!
Threshold S200 Exceptional condition, Unmarked/unmolested ! For Sale - US Audio Mart
Another!
https://reverb.com/item/36987727-threshold-s-300-series-ii-stasis-solid-state-power-amplifier?gspk=S...
https://www.hifishark.com/search?q=threshold
This is a nice one!
Threshold S200 Exceptional condition, Unmarked/unmolested ! For Sale - US Audio Mart
Another!
https://reverb.com/item/36987727-threshold-s-300-series-ii-stasis-solid-state-power-amplifier?gspk=S...