If John Dunlavy used Spectron amps for his development evaluations then I'd be surprised. That's not to say it didn't happen, just surprising if it did.
I owned Duntech Princess speakers for 19 years. They were the older sibling to the DAL SC4 and 4a. I enjoyed a few discussions with John at CES demos. He did like some tubes as he utilized ARC electronics for demos. I know he also admired Adcom as an example of performance per dollar. He revealed he was trying Adcom modules in development of a tri-amped self-powered model.
I experimented with several different amps over my time with the Princesses. Toward the end of that ownership I found my best choice, the Parasound JC-1 monos. From what I've read, the DAL models may have been more efficient than their comparable Duntech siblings, but I would still look for something close to at least 200 wpc with Pass. Dynamics can be startling but you need current to realize that.
I owned Duntech Princess speakers for 19 years. They were the older sibling to the DAL SC4 and 4a. I enjoyed a few discussions with John at CES demos. He did like some tubes as he utilized ARC electronics for demos. I know he also admired Adcom as an example of performance per dollar. He revealed he was trying Adcom modules in development of a tri-amped self-powered model.
I experimented with several different amps over my time with the Princesses. Toward the end of that ownership I found my best choice, the Parasound JC-1 monos. From what I've read, the DAL models may have been more efficient than their comparable Duntech siblings, but I would still look for something close to at least 200 wpc with Pass. Dynamics can be startling but you need current to realize that.