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Speaker match for PrimaLuna Dialogue Premium HP Integrated?

Hey Guys,
Wondering about speaker match for PrimaLuna Dialogue Premium HP Integrated.
Using KT150 and Mullard CV4003. So maybe 50 watts in triode and 100 watts in ultralinear.
Don't like ultralinear much. (GeorgeHiFi linked some curves showing ringing in ultralinear:
https://forum.audiogon.com/discussions/primaluna-dialogue-premium-hp-tube-rolling-suggestions-to-red...)
Setup is in a small room currently. Had used Revel F206 (which I still have) and now Zu Druid MK IV.
Revels sound pretty good but I don't think they show their best with limited tube power.
Plenty of power for the Druid, and it sounds pretty good but response curve seems uneven to me.
So Revel nice response curve but a little tame. Druid pretty lively/ fun but uneven tonal balance.
Anyone have a particular favorite speaker match up for that amp in the $3K-$5K range?

leotis

Showing 3 responses by georgehifi

georgehifi's avatar
georgehifi
10,312 posts
 
I misrepresented what George had said on a different thread.
I’m sorry I showed the bench tests/reports for the PrimaLuna DiaLogue Premium power amplifier. JA said:

"As AD found in his auditioning, the PrimaLuna DiaLogue Premium performs at its best with KT120 output tubes operated in Triode mode. However, that high output impedance, and the rise in distortion when the load impedance drops below the nominal output-transformer tap value, will make careful matching with the user’s loudspeakers mandatory to get the best sound from this well-made amplifier.—John Atkinson"

Read more at https://www.stereophile.com/content/primaluna-dialogue-premium-power-amplifier-measurements#GTpdQTrF...


But looking at the graph the Dialogue Premium Integrated is also overshooting on square waves with any capacitance loading as well in Ultralinear, from the 8ohm taps not to mention distortion rises much so as well above 10khz.

https://www.stereophile.com/images/1214PLDPIfig02.jpg

https://www.stereophile.com/images/1214PLDPIfig03.jpg

https://www.stereophile.com/images/1214PLDPIfig13.jpg

https://www.stereophile.com/content/primaluna-dialogue-premium-hp-integrated-amplifier-measurements

Cheers George



georgehifi's avatar
georgehifi
10,312 posts
 
I didn't post any here, they are on another thread. And John Alexander backs it in his measurement conclusion.
https://forum.audiogon.com/posts/1425159

Cheers George

 
georgehifi's avatar
georgehifi
10,312 posts
 
With the Prima Luna in 4ohm triode mode which is it’s healthier looking output, you haven’t got a lot of grunt there to play with.
I think out of the two speakers you mentioned the Druid is by far the better match impedance wise and efficiency wise if you like their sound.
http://www.6moons.com/audioreviews/zu20/plot1_big.png

To me I would like the Revels better, "with the right amp" but this graph of the 208 is said to be similar to the 206 as you can see there are current hungry loads at 30hz and 60-150hz and again at 3khz all with highish -phase angles.
https://www.stereophile.com/images/714R208fig1.jpg

My suggestion is to keep the Revels and get the right amp, which will then drive "most" things down the track.

Cheers George
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