highly sensitive loudspeakers for single ended poe

To get the best results out of an SET, unless its fairly high powered, the speaker should really not be less than about 97 db. Otherwise the amp will be making a lot of distortion, meaning that it will not sound as transparent and will also take on a harsher quality.

Typically efficiencies 10x higher than stated in prior posts (101 db to 109 db) are preferred- with these higher efficiencies the distortion of many SETs becomes unmeasurable.

This is why horn systems like Altec, JBL, Klipsch, Electro Voice and others have held their value so well. But in general, you want either a horn system or a high efficiency single-driver full range speaker like a Lowther, PHY or similar.

Now if you are in a small room the lessor efficiencies may work. As in many cases, YMMV.

I use a 300b SET with my Zu Def4s, and the sound fills my large space without any difficulty. It depends on the tube, the design of the SET, the output power, and many other factors including the room and (in my case) a very long run of speaker cable. If you are interested, you should call Zu to discuss. As I have learned, almost every SET is different and should not be lumped together. I had Def2s and tried 45 and 2a3 tubes before settling on 300b. Others swear by 845s. Other speaker considerations include the soon to be released Zu Druid 5, Audio Note, and Living Voice.

Another vote for Daedalus. I spent a lot of time looking for SET friendly speakers, but avoiding horns. I have'nt found a horn speaker, I could enjoy long term.

The 3 brands I realy enjoyed were Silverline Devore and Daedalus. The latter seemed the best in term of price, appearance and sound quality and my DA-RMa's run just fine with a 20 watt Ayon Spark. I am not sure a 10watt 300B, would be a great long term match.

Coincident Total Victory.

WHT speakers look interesting and the US distributor is currently selling direct at substantial discounts - I presume, until he establishes a dealer network.

http://www.tmhaudio.com/