Jeff Jones, I have no personal knowledge of the Rogue 150s, but usually when UL amps are wired or switched into triode, the maximum power reduces TO about one-third or just a little more. I'd be surprised if the Rogue 150s have more than 60 Watts max. in triode...
...which MIGHT be enough, depending on one's listening levels. I have and LOVE Quad 989s, which have a sensitivity rating of around 86dB. I was driving them full range with tubed monoamps that use 4 6550/KT88/KT90s in either UL or triode and are rated at 100 Watts in UL. (Never got an owner's manual so don't know what the triode rating is.) My room is fairly large at about 3200 cubic feet, and I listen to large-scale symphonic music. The '40-Watt' amps had plenty of power, never clipping. I recently replaced them with Antique Sound Lab Explorer 805 DTs, mono SETs with 50 Watts max. power. Again, I have plenty of power and NO clipping.
883Dave, I suggest you try some tubed amps before you commit your thou$andS.
BTW, UL amps run in triode sound to me simply richer and more like real music in the mid and high frequencies than they do in ultralinear. There was a long and thoughtful discussion of UL v. triode here a few months ago; you might search for it.
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