Decware and SET Low Power Tube Amps with Hi Efficency Speakers

I went down this path after years of curiosity. I started with the speakers and purchased the Omega Super 3i. I paired them with several amps before finally purchasing a Decware SE84UFO. The reported synergy between these two manufacturers is indeed the real deal. While this approach isn't for everybody, it's everything I hoped for. There is a rightness to the sound that is just captivating. Good luck.

@larryi .. as I understand it the efficiency is too low with both ProAc's and Harbeth's, thus a bad match for Decware's line. Harbeth, for example, state in their FAQ:

We have a social responsibility to our neighbours (and to our own ears) and we'd recommend 100W per channel or so for those occasions when the neighbours are out. But for normal use in a small room listening relatively closely to low-dynamic music, 20 or 30W can sound loud enough. A practical compromise would be an amplifier rated at around 50W/channel/8 ohms.

Perhaps this is the reason for the dull and lifeless sound you heard. The efficiency of my Omega's is 94.5, which is on the low side for a 2 wpc amp. For me, the SE84UFO is anything but lifeless.

@larryi  .. fair enough, no one should just accept raving fan boys gushing about any gear. The OP did however ask about Decware's low-powered SET amps paired with high-efficiency speakers. Decware has been around for quite some time now and their amps have been well-reviewed with appropriate speakers. Neither their philosophy nor their products are everyone's cup of tea but they are well-built and have great value, certainly worth a 30-day trial for those wanting to go down this path. 

BTW, I've used supposed under-powered amps with a variety of very inefficient speakers with surprisingly good results. My Mark & Daniel Rubys with 82.5 sensitivity sounded great with a 25 wpc amp as long as I didn't push it too much. Same with my MMGs. As usual, it's system dependent and personal taste.