Is this enough power?

Good, question--but YOU, are the only person that can answer this question. It works for ME, on paper...but that doesn't mean you'll be satisfied.

Good listening,
Larry

Thanks again for the explanations. I finally found a graph with phase.

Looks like the lowest phase angle is approx. -40 degrees at 30Hz where the impedance is 10 ohms. Other than that dip, the phase angle is above 0 degrees.

From what I understand from the above posts, this means this should be an easier speaker to drive and that the 30w of SET should be enough.

Have also found that most tests show that the speaker is 90db/2.83V/1m. Maybe the manufacturere specs are conservative.

Looks like the lowest phase angle is approx. -40 degrees at 30Hz where the impedance is 10 ohms. Other than that dip, the phase angle is above 0 degrees.

From what I understand from the above posts, this means this should be an easier speaker to drive and that the 30w of SET should be enough.

Have also found that most tests show that the speaker is 90db/2.83V/1m. Maybe the manufacturere specs are conservative.

I would still suggest caution before reaching that conclusion. Given that the speaker's impedance is 4 ohms below 1kHz, its efficiency in that region (where most of the power is typically required) is only 87db/1W/1m, because 2.83 volts into 4 ohms corresponds to 2 watts.

Assuming that you are referring to dynamic (non-planar) speakers, it can be calculated that 30 watts into each of the two speakers corresponds to a 95db sound pressure level at a distance of about 10 feet. As I indicated earlier, that should be good enough for most recordings but not for all.

Regards,
-- Al

If a trial listening period for the amp can be had.. there's your answer.

Go with Al's comments... and later on... get one more amp, or more sensitive speakers..

Maybe you could also enclose that room with pocket doors or a pre-hung one andd a little build up around it... Otherwise, you're actually filling sound into the whole of the total cubic feet of the entire spaces. Listening area, AND kitchen area.

My situation (roomwise) was similar a while back. I've since closed off my room for a more dedicated listening - vviewing arrangement. I had pocket doors separating the kitchen from the living room, and a pre-hung 3/0 closing off the hallway to the rest of the house on the opposite side of the room. the room is roughly 14 x 21 x 8.3 with a gently sloped ceiling.

It helped the bass out tremendously. Imaging and separation too. Night and day diffs for viewing.

I ran some higher eff speakers with about the same sort of imp curve, roughly, off my 4 ohm tap on my 120 wpc monos... making it/them output half of their power at 60 wpc. Never listening to exceptionally high levels (avg low 90s) regularly, with occassions running them at the high 90s and never noticed any issues.

The info Larry and Al have given is key and prudent as well as accurate I'm sure.

the full realization of musical enjoyment comes from having a system which can reveal the honesty of its emotion and it's voice. Meaning, you might want to consider some nearfield listening situations. Getting closer to the speakers with your chair.

Ultimately I reverted back to the 8ohm taps and never looked back. the 4 Ohm taps yielded a warmer softer more romantic presentation... and the 8s showed a brighter, fuller, exceptionally more dynamic face of the music. Including better bass. Much better bass.

So as Larry said, the presentation might be alluring enough to offset a desire to raise the fun knob...

I feel often that we tgotta make compromises or replace things we may not want to in order to gain that which we seek, better. So if you love the amp... or love the speakers ... shuffle off the one you don't love quite so much down the road... as I'm figuring you ain't married to either one... possibly the amp ought not be bought unless the idea of new speakers is on your horizon.

Either way.. good luck.

Audio,
I had hoped you'd look at the links a little better.

One thing I didn't say and Larry didn't touch on either is that phase angle has 2 aspects. The general measure is 'reactance'. However, there are 2 kinds of reactance.
Capacitive and inductive reactance are both measurable but it is the capacitive aspect which will give tube amps a problem. I believe in the stereophile graphs, that is the part below the 'zero' degree line.

Look at the link i provided to the 'Smith Chart' and go to the 2nd page for the presentation I prefer. It is both impedance and reactance represented by a SINGLE line in a big curly q shape. The distance down the line is frequency so that is tougher to figure out. The tiny curly q's are crossover frequencies, usually