Would I have enough power?


Having completed my first DIY speaker build in years (Seas A26), I'm really wanting to try a lower power tubed amp again. The A26 is a true 88dB efficient, 8 ohms minimum speaker, with an ultra-simple x'over too, no less.

I listen mostly at moderate levels, with the occasional loud burst, but my open floor plan room's on the large size (speakers 7' apart, me 9' back, another 10' behind me, to my left is the dining area).

In your experience, am I good with 10-15 clean watts here, or stick with EL34, etc. ?
greg7
Just off the top my my head, 88db speakers and 15 watts is not going to cut it. My .7 Maggies and my KT-88 driven Prima Luna only works because I do not play very loud and I'm in a smallish room.
Maggies are less efficient at 86dB, but also are specified for 2.83V and 4 ohm (at 2W).  Specification at 8 ohm (or 1W) would be 3dB less resulting in 83dB vs 88dB for A26.  5dB difference is equal to 3.2 times more power required.  You would have to drive Maggies with 48W to get the same loudness as his A26 with 15W.
Excellent distinction that is often overlooked. 2.83v/1m  at 4 ohm versus 8 ohm. Almarg would  politely remind people of this on a regular basis.  And again OP 'specifies'  moderate volume level for his listening, 
Charles 
"...You would have to drive Maggies with 48W to get the same loudness as his A26 with 15W..."

I have never owned any system where 15 watts was satisfying.