Are there any tube amps that don't give off any---

Hello,
Maybe you could try a tube preamp and a SS amp together. The tubes are smaller in the preamp. Rouge has a new Rh5 preamp  that is also a nice headphone amp. Also get a tube preamp for your TT. Smaller tubes at the front with SS at the back. Ayre amps are nice sounding amps with a warmer but open/ airy note. Also an R2R DAC for your digital like Denifrips. R2R is a little more subdued like tube. Maybe a quiet exhaust fan to pump the hot air outside like what a dryer uses. 

Hi daveyf

You May want to explore a hybrid amp. This is an amp with a tube input stage so you’ll get the benefit off tubes such as the tonality and the timbral accuracy that tubes offer with a solid state output stage (class a/b would give off a lot less heat compared to a pure class a design). This way you get the best of both worlds with a lot less heat then a tube amp. In a tube amp, the larger output tubes give off the most heat.

There are are a lot of them out there. I don’t know your budget but PS Audio BHK amps are supposed to be very good and they always get good reviews. They are also not hard to find in the used market because they’ve sold so many of them. There are many others to choose from at all different price points. 

What I did is I bought a tube preamp which gives me that tonal color and “bloom” and accurate timbre that I can’t live without and I use a smaller solid state amp which to me sounds great. I have been very happy with that setup for years. Good luck.

Scot

I would suggest a hybrid amp that has the tube sound with much less heat. I own and am selling a Lector amp that fits the Bill 

Someone else has probably already suggested this but why not get a tube preamp and a solid state amp? The small tubes in a preamp will not produce much heat and when combined with a non-class A amp should give you the best of all worlds. Some of these preamp actually totally enclose the tubes. Something like the Schiit Freya with a good sounding amp should do it, I doubt that most class AB amps would add much heat, they may run slightly warm but it shouldn't be a problem in my experience. If you really want to kill the heat, class D is an option as people have reported but for me, I seem to be sensitive to their sound and I don't like it. Even the well regarded Rogue Sphinx 3 is a tube integrated with a class D amp and I passed on it. I understand some of the higher priced Parasound amps are well regarded. Schiit has a reasonably priced AB amp but you want to avoid their Class A Azir (?) amps for heat. My Schiit Raganok 2 is class ab and while it gets a little warm. Not an issue with me at least. 
I have read great reviews of the Brooklyn Class D amps so do your homework, get a 30 day or 60 day return on the amp and go for it. 

look for a tube hybrid if you are concerned with heat

To avoid the heat of a tube amp. I guess your only option is to get a small amp and efficient horn speakers. I just auditioned a small Boyuu Reising model 100 amp that sells on Amazon for $400. It was really well built, sounded excellent but just didn't have enough power running two EL34 tubes. I matched it with some 90db Triangle Bro 3s and at 3 o'clock volume, it just was too soft for my 15x17 room. If you wanted a bargain system, combining this amp with some Klipsch M 600 speaker would be a nice setup for a  small room. I've seen these speaker on sale for about $400. Nice reasonable setup that will play much bigger than one would think. I did return the amp in favor of a Muzishare x7 with four KT88 tubes at 45 watts. 
Yeah, I know people like to gripe about Chinese stuff but look around. It's everywhere. You want an American tube amp, just pay for it. 

Hi Ralph, what happened with your prototypes? Any closer to your class Ds?

Yes. We've continued working on the design, hammering out details. Recently that's turned to the power supplies, since the entire thing has to be protected against shorted speaker loads and the like.

I have a small integrated amp with 6C33C that put out a lot of heat and I biased these low, to the point that the entire amp innards get very hot, I set a Noctua silent fan underneath which helps with the heat but in the OP's case will only move the heat away from the amp into the room possibly making it hotter, I found a company which specializes in all these cooling solutions ACINFINITY you might be familiar with, like others have stated it may be easy to run a duct to the outside or other room with an inline fan, these are supposed to be quiethttps://www.acinfinity.com/duct-fan-systems/
32 dba is the equivalent of a quiet rural area so it should be pretty silent
Just my 2c

"I don’t think you are ever going to find an amp that runs totally cool.   There is electric flowing through it and that is going to generate at least a little heat"     Correct!      All gain devices will generate heat, while in operation (none are 100% efficient), but- not all gain devices are defined as, "THERMIONIC" (requiring some heat to operate in the first place).      The operating parameters of one’s gain devices and how much output power is being called for, will determine how much heat finally results (aside from a filament’s contribution), while signal is being amplified.      ie: Some tubed Carvers = cool enough to touch / some FirstWatt (Class A, SS) = too hot to touch (for the sensitive)

Daveyf, my understanding is that Carver amps run cooler than most.
I am not sure if you can do this but, if you have a basement you can do what I did which is to make a shelf 12" under the floor and drill a few discrete holes to run wires. I also run fans. I put pots on the supply lines so I can control fan speed. I can slow them down to the point of not being able to hear them at all upstairs. Check out my system page.

Hi Ralph, what happened with your prototypes? Any closer to your class Ds?

I hear good things about the Element, Purify and a few others.

Thanks guys, but like I stated in my OP, I dont want to consider Class D amps, at this time. 
@atmasphere  curious as to what you would suggest in Class D that rivals tubes for smoothness and detail, I can only think of one amp that this may apply to...the Jeff Rowland.

I don't think you are ever going to find an amp that runs totally cool.  There is electric flowing through it and that is going to generate at least a little heat

The coolest amps are going to be class Ds no question but even they give off a little heat.  Rogue's Hydra and Dragon are class D's with tube input stages.  They are excellent.  I have the hydra and it doesn't heat up much.  The Sphinx and Pharaoh are integrated amp options from them.

AVMs Evolution A 5.2 is a hybrid Class D integrated amps with a tube input stage.  

i am sure there are other Class D Hybrids.  

These will be the closest you are going to get to cool tube amps if LTA is not an option.  .  

@daveyf If heat really is the deal (and installing inexpensive venting is out of the question), then you might consider a class D amp, as they run the coolest of any kind of amp. There are some class D amps now that rival tubes for smoothness and detail. However one thing about class D (and nearly all solid state amps for that matter) is that you have to have enough power that you never clip the amp. Tubes are different in that they can have such a graceful overload character that you don't know that the amp is clipping- hence the myth that tube power is somehow more powerful than solid state power. But its a myth; its just that they overload differently.

@isochronism   Good to know.

If you can't take the heat ... stay out of the man-cave!

Remember Ralph, hot glass looks just like cold glass. This is from personal experience (goes for metal as well).

True, but this comment (taken out of context) was part of an explanation of how in most cases the filaments are not why tubes run so hot- the 6C33 being an exception.

Small SET amps are fairly cool running and won't heat a room.

@atmosphere 
" you can have the amps on all day and walk up to them and grab a power tube and hang on..."  

Remember Ralph, hot glass looks just like cold glass. This is from personal experience (goes for metal as well).

"...get yourself one of those small computer fans and for a few dollars, your tubes will run cool and you’ll extend tube life too."

As much as the tubes may run cooler, the amount of heat in the room will stay the same, I think (theoretically even higher due to fan operation heat). It would not solve the OP’s problem.

"We have a number of customers that have their amps installed in the basement beneath their listening room, near the ceiling so the speaker cables can be kept short."

Very economical and environmentally-friendly version of what is usually called "floor heating".

very small room + tube amplifier + heat worries = tube headphone amplifier

@jond  I actually do a seasonal amp rotation, the tube amps for the winter and mostly the ss amp for the summer. Even so, the ss amp heats the room enough within about 1.5 hours that it is time for the AC. 
Swapping out the KT150's for El34's may be an option. The big KT150's do give off some heat. I cannot imagine an amp with 24 of them or more...like the ARC Ref 750 or the upcoming newer version...Total heat engine!

@daveyf If you don't want to give up your Jadis amps you can use them with 6ca7/El34 tubes which will give off considerably less heat than the KT150's you're currently running.


If however you want a totally cool running amp Class A/B SS would be the route to go are you considering a seasonal amp rotation with the Jadis?

In my room, even an amp that puts out just a little heat, over time heats up the room considerably. I already own a couple of amps that put out just a little heat ( one a ss amp, one a tube amp). I also have AC, and in the summer, this is required. The AC runs fairly quietly, but one can still hear it..again due to the size of the room.
My OP was really more about an amp that runs totally cool, vs. one that runs a little warm. ( many tube amps run a little warm --and a few monsters act like space heaters!).

I have heard a Shiit Saga preamp with a solid state tube. I could not tell any difference in sound as opposed to a regular glass tube. It ran warm, but not hot. For power amps, I am not sure if solid state tubes exist? It sounded really nice.

Hi daveyf...

You didn't address power requirements and such.  I am extremely happy with my newly purchased Music Reference RM-10 MK II used in my tiny dedicated studio.  It sports 4 small EL84 power tubes that produce a healthy 35W per channel.  If curious, you can see recent posts for details.  Best, Pin  

I have the same heat issue in a small listening room which is next to my walk in closet. I decided to cut out some drywall near the ceiling and put vents on it so that I can dump heat into the walk in closet. I have Pass Labs X250.8 amp with BAT Rex2 preamp, which together consume 900 W idle.

I’m using a Music Reference RM-10 in one of my systems. It uses EL84 output tubes, and puts out very little heat, less than any tube amp I’ve ever owned, and less than many SS amps I’ve owned as well. It’s small, light, and sounds great. 

Hello,
If you do the duct and fan try to put in 4”insulated flex line to quiet it down. I would try one of those super quiet bath exhaust fans on a switch. Also do not dump the heat in the attic. In the winter time you could create mold or mildew and run into ice problems on the roof. 

Are there any tube amps that don't give off any---

Yes, One's that sounds like sh*t!

I havea  Defy 7 , has 12 6550's, Honestly heat has not been a  issue, room 10x12 8 ft ceiling,, here in new orleans 90% humidity, I mean yeah in summer i run a/c as needed...
 , but on cool/fall days ,
 a/c is not needed. 
You'll be fine with a  mid size tube amp

Croft Integrated Amplifier. The best hybrid amp period. Heat generated is minimal and sound is the best I've heard. 

I have a PrimaLuna DiaLogue Premier HP and not only does it sound great, but it puts out 75 watts and does not heat the room up.  As others have noted, all tubes give off some heat, but this amp runs very cool and definitely a lot cooler than my Class A SS amp

Bob Carver-- the 275!!!

Here’s a great tweak that no one knows about.

Place your tubes in the refrigerator overnight, preferably the vegetable crisper, for 8 hours before listening.  The next listening session, your tube amp won’t produce any heat whatsoever!

Ok, don’t do that - instead, get yourself one of those small computer fans and for a few dollars, your tubes will run cool and you’ll extend tube life too.

What you need is a single ended 2,5 Watt tube amp with highly sensitive horn speakers or a fullrange Tang Band ...
You than might add an small active subwoofer for lower mid and bass

Tubes have to heat their filament to be operational. That is their principle of operation.

It is, but that is not why tube amps run hot. I explained that earlier.

My dedicated room is a stand alone structure on a concrete slab. No basement.

'Stand alone'? Like an outbuilding of some sort? If yes, installing a ceiling vent would be easy and inexpensive. If you already have an amp you like, this really is the easiest (and cheapest) solution, and its not noisy.

this is crazy/ started reading this the other day, i got interrupted had to quit. if you want cool like i said, this is crazy if you want cool get a variac turn voltage down to 112/110/108/105 vac. tubes much cooler. 6l6s at 110 you can hold them in your hand(not responsible if you have very tender hands) this might satisfy your heat issues...and its cheap just don't use the power tool voltage regulators(voltage bounces too much)

Tube amps and Class A transistor amps run full steam 100% of the time.  You must decide whether the sound is good enough now, or with an added noisy A/C unit cooling your tubes.

Another recommendation for Berning. I use a ZH 270 with Guarneri Homage and they sing. The Quadrature Z are fantastic also. 

Tubes have to heat their filament to be operational. That is their principle of operation. It is like the car engine which relies on an exothermic reaction to do its job. The amount of filament current may be less in some more modern designs but even then, there will always be SOME heat.  It is probably impossible to find tube amps which do not generate ANY heat. Correct me if I am wrong.

If you are so sensitive to heat, then you should get a class D solid state amplifier.

@atmasphere  Punching holes in walls or floors is not an option. My dedicated room is a stand alone structure on a concrete slab. No basement. 

Linear Tube Audio makes an excellent sounding amp that runs cool.  Tube life is said to be 20 years or more.
Also Carver has its Crimson 275 that runs its tubes at about 1/3 the current of other amps.  You can actually put your hand on the power tubes without getting burned.  

How lucky you are that you can listen to any music from even a solid state system on warm days without having to turn on the air conditioning. I'd like to move to the North Pole at this point just so I can listen to music from June to October without concern. As soon as the air conditioner goes on the music goes off.

YES! Rogue Audio Sphinx. Hybrid. Tube Pre, Class D output.Sounds lovely. Runs cool.I got mine in early September, this year. It is now my primary unit.My room is small, 10' x 15' and I live in Tucson Arizona and temp here have run 100 degrees plus all through September.
Sound quality is a big improvement over other pure class D's I've had and frankly, better than other Class AB's I've had.Never had a pure Class A - all tube. Way too hot for AZ in my opinion.

if your looking for tub sound with minimal amount of heat, I’d look at a hybrid amp like the one Lector puts out. They’re made in Italy and sound as good as any full fledge tube amps. I run this amp all summer long and switch to AudioValve Baldur during the winter. The Baldur’s have 10 tubes per side and sound incredible. I highly recommend the lector’s for your room setup 

I know two people have already mentioned the Carver 275 but without much context. Carver runs the output tubes much cooler than typical, so he can guarantee them for 5 years. The 275 is sort of a miracle amp - it runs just a little warm, weighs only 19 lbs, yet drives my low-impedance  Wilson Sabrinas spectacularly.