Which Threshold s are best?

The Threshold SA/4e power amp is more refined than the newer Pass amps. I found has a better midrange and imaging than the PASS amps. The PASS X350 had more bass but the drawback was not as smooth , or natural in the mids as the Threshold SA/4e amp.

True the Threshold SA/4e is a pure class A sound verse the Pass X350 is Class A/AB sound.

Now when compared to the Pass XA100 amp I still prefered my Threshold SA/4e. Better dynamics and still smoother in the mids and top end with the Threshold SA/4e amp.

The XA100 had a slight edge in depth . It seems that the newer PASS amps emphasize more on bass- boom sound than being more dynamic and smooth. In my opinion the Threshold SA/4e is overll a better sound than the Pass X350 . And it's a matter of taste if you want more boom in your bass with the Pass XA100.

I also own a pair of Pass X600 amps which I use in anothe system. Again a lot of bass and depth but misses on the
Mids and TReble smoothness when compared to the Threshold SA/4e. I still like the Pass X600 amps for my application needing bass.

In summary the Threshold SA/4e is a finesse sounding amp. Very smooth, articulate and natural sounding. Still has plenty of power to drive just about any speaker out there even though it's a modest 100 watts pure class A sound. In fact when I had the Pass X350 verse the Threshold SA/4e listening levels were almost the same on my preamp.

Lawyerman great analysis of the Threshold amps.
The Threshold SA/4e is a great amp. I also prefer the Threshold SA series over the Pass Labs new stuff.

Sorry my beautiful silver Threshold SA/1's are not for sale. Will probably take them to my grave.

They are doing a S/350e reissue. Any comments on this product?

The original was made in the USA. The re-issue is made in China.

I own an original S350e. Pretty much all Threshold amps are great sounding especially the S and SA series, last of the Nelson Pass designs. I would assume that the new Chinese reissue of the S350e should sound as good as the originals if the same parts are used, the only issue may be possibly one of quality control and reliability. The original designs were built like tanks and designed to last a lifetime. That being said though there are some pretty decent designs comming out of China these days. As far as comparing the Threshold sound to Pass Labs I haven't had the oportunity to listen to as many Pass Lab amps as I have Threshold as there is no Pass dealer in my area. I will say though that even though the Pass amps may be newer much more expensive designs, the older Threshold designs can hold their own quite well against the Pass designs OR most any of the newer designs of any other manufacture. I'm sure we can all agree on one thing though, Nelson Pass has got to be one of the top few great amp designers.