Rowland model 5 vs Threshold S500 series II

Have had the Threshold S/300 Optical bias, the SA/1 mono's currently and model Rowland model 7's.
Threshold has never been very strong at 2 Ohm loads.
The model 5 can deliver more current then the S/500 it sounds more polite then the S/500.
According to J. Gordon Holt the Threshold S/500 was superb on Acoustat. So if you want a more laidback and smoother presentation I would go for the Rowland. If you want a more vivid and detailed one I would go for the Threshold.
They probably, the Rowland certain, will drive a 2 Ohm load (if it behaves like a Magnepan) both of them.
Success

If you have the opportunity to buy the 500/II or even better I think it was called the 550 ? BUY IT! You'll need to put a good pre on it, but it is much better than the Rowland 5. Havent heard the 7, but the 500 was a great amp! It sound staged, had fast bass and extended on both ends to infinity. Must be partnered with a non edgy pre. A good tubed unit or actually a Rowlnd Capri would be killer in that! In addition, I think service will be easier on the Threshold as Jeff doesn't want to work on the old stuff and there are several companies who perform outstanding maintenance and mods on the Threshold stuff.

Not sure where you get the idea that Mr Rowland doesn't like to work on his old stuff, that is definitely not my experience. I called ahead and was in the same day to have my model 3 amps and Consonance pre checked out. He spent over an hour-and-a-half checking them out while I watched. A very nice and helpful gentleman!

I've known Jeff Rowland for 30 years and I've owned many pieces of his gear, new and old. Seldom have I ever needed repair but the service I received was quick and free of hesitation or excuses. Jeff stands behind everything he ever made.
You may have reasons to buy something other than Rowland as I have from time to time over the years but do not let concerns over factory support dissuade you. It is among the best. This is one of the reasons why Rowland gear has the highest resale value on the market.

Gents, I am not aware that David was trying to disparage Mr. Rowland in any shape or form. Reality is that when a small company with finite resources is in furious development of 4 new major offerings, the updating of an older discontinued product may take longer to get on the surgery table.