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What tube amp for Harbeth 40.1

I am looking for a tube amp for Harbeth 40.1.  I know many suggest SS amp such as Accuphase, Luxman, Hegel, McIntosh ... etc for Harbeth, but I decided to keep it with tube.  I also don’t think I need a lot of power.  I currently have a 8W custom built 300B and had a 18W Almarro 318B, and to me, they sound fine.  However, I think more power will help, and I never know what I missed until I try it out.  Having said that, I don’t think I need crazy power.  Anything 30-80W is good enough for me.  I am 3m away from the speakers, listen to Jazz at avg 83dB.

i have the following short list:
1) PrimaLuna Evo 400 integrated
2) Leben CS600X 
3) Linear Tube Audio Z40

Which one do people like with Harbeth?  Any other suggestion?

Among all qualities, I value holographic presentation the most.  I really like the feeling as if the singer is floating in front of me, if you know what I mean.  And my current 300B do pretty well in this regards, and I read this is what SET amps are good at.  Will I be disappointed with the above?
Thanks.
gte357s
Post removed 
three_easy_payments's avatar
three_easy_payments
2,097 posts
 
+1 on the recommendations for an OTL design or Line Magnetic.  You're gonna need a bit of grunt with tubes to get those Harbeths to sound lively.  I think a LM 805ia may be a good choice with its' 48w of Class A SET and 300b tubes possibly giving you exactly what you seek.

I noted J.A.'s comments when he measured the 40.1 in Stereophile:

My estimate of the big Harbeth's voltage sensitivity on its tweeter axis was 84.5dB(B)/2.83V/m, which is within experimental error of the specified 85dB/2.83V/m. This is lower than average, and suggests that a goodly powerful amplifier will be needed to achieve high playback levels. (I note that AD's 10W Shindo amplifier didn't cut it.)

highend666
352 posts
 
Audio Reveal Second is a great match with these speakers..
 
www.highfidelity.pl/@main-990&lang=en
gte357s OP
281 posts
 
@twoleftears i am thinking an integrated.  It is the Z40.  Budget is a concern, bought too many gears within this year already.

@elevick yes, I considered hybrid and seriously look into McIntosh MA252.  I always want a piece of McIntosh, but have been using efficient speakers.  Initially, I think this is my chance to buy a McIntosh with 40.1.  But after doing some research, I am not sure.  MCs are expensive, and it seems a big part goes to the brand.  The MA252 is more affordable, but then some comments says it clips (with the light turns from green to orange) easily even at normal volume.  I don’t think volume is a concern for me, but it seems the quality of the product is not as good as their more expensive amps.  It seems for the money, I can get more from other brands.

gte357s OP
281 posts
 
And my budget is $4000 for used equipments.
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