I was buddies with Anthony Gallo, of Gallo Acoustics, before Anthony made it big. I helped him along with his journey of loudspeaker design ( as a listener / beta tester only, and was offered, by him, to invest in his, then, company start up ). I did not have the funds he needed to get started, nor did I have a wife, at that time, who would allow me to, anyway. Getting back of this thread, Anthony used an Amber 70, for years, as his go to amplifier, during his earlier designs. I, with my very large amplifier collection, brought many of them over to his place, and although I preferred many of them over the Amber, the little Amber held it’s own. He still believed in the model 70, continuing to mod it beyond expectations. It was a good amp, at that time, and like many older amplifiers, I could imagine what a complete rebuild would be like ( better, newer components ). As many amplifiers from back then, and this ime, are somewhat dark sounding, with not much detail. I sold a # 70 2 years ago, as I was lessening my vintage collection, as opposed to Roberjerman above, and many others, who likes older designs, and continue to buy them. Stock, today, nothing special, again, imo. YMMV. Enjoy ! MrD.