2. amps-preamps
  3. 190873-3022

Need A 10-30 watt Tube Power Amp, Lower Heat Output, Which Sounds Great, Under $1500 Used

I am in need of a mid-spring to mid-autumn power amp. This is for my office system that gets a LOT of use and is therefore very important, in terms of sound quality. I have been using a great SET amp, but the 845's it's based around simply heat up the smaller room space too much during warmer weather, even when running central air. I've been in the tube audio game a long time, though, and know there are amps with designs and tubes that run far cooler and wouldn't present the room heating issues. 

I pondered something solid state, but there simply isn't much in the power range, which is also within my price range. Also, I would want an amp with at least some tube-like sound qualities, which makes it even more difficult. In a perfect world, something like a First Watt F7 would be ideal, but its twice my budget, used. 

10 watts would do it, but anything up to 50, or so would be fine, of course. It will be powering Omega, single driver speakers of 94.5 sensitivity and be paired with a Zesto Leto preamp. 

Any suggestions would be greatly appreciated. Thanks! 

nightfall
vthokie83
862 posts
 

Nightfall

I have a Bob Latino VTA ST-120 with the capacitor upgrades and a built in stepped attenuator (no need for a preamp), that I am going to put up on Agon in the next week or two. It will be a bit over that $1,500, but will include high end tubes. Send me a DM if interested

dth31
1 posts
 

The ad below is for a great amplifier. To get 15-20W you will have to use a 300B-like tube that is designed to operate at higher voltages. The seller has struggled to sell it. Make an offer in your ballpark—he may well accept it.

 

https://www.ebay.com/itm/365047849353

buellrider97
388 posts
 

  For a tube power amp , I’d recommend the Dennis Had Inspire ( 12 wpc ). For SS I’d recommend the Van Alstine NP1 power amp ( 55 wpc ). I’m running a modded Akitika ( 50 wpc ) in rotation with the Had into Zu Omens with a Rogue pre. I’m going to try the Van Alstine in place of the Akitika. I think either would pair well with that great little pre you have. Also I’m a big fan of NOS Tekefunkens. Cheers and happy hunting , Mike B. 

limomangus's avatar
limomangus
1,426 posts
 

Cayin Mt50...I've had one four 4 years 35 watts /15 never had a problem, powers,my Polk Lsim 700 which ,I've have had driven with 100 to 300 watts amps.This Amp powers them with no problems...

iopscrl
196 posts
 

Your situation and stated preference seems to be perfect match for an EL84/7189 based amplifier.  10--20wpc, small footprint and does not generate a lot heat.  I sympathize with your situation.  I use a Triode TRV845 PSE / 845 SET amp.  I can literally see waves of heat coming from the amp during warmer months !

I would look for a vintage restored amplifier.  Dynaco ST35 is a well regarded model. Also Eico HF14 pr, HF86 stereo. Fisher 20a or 30a pr, or SA100 stereo.  Heathkit UA 1/2 pr or AA111 stereo.  Make sure the amps are rebuilt from top to bottom using new close tolerance components.  

If you prefer new, look for a Luxman or Leben amp / both companies offer EL84 based designs that sound wonderful.

If EL84 amps are not appealing then there is a whole world of choices using 6L6GC/KT66 or EL34 tubes.   More power, but slightly more heat....however not as much as your 845 SET.   The venerable ST70 dissipates a lot of heat in stock/rebuilt condition !   I would consider a new version or an original with new PS and audio circuits that run much cooler.

A slightly more expensive option would be a McIntosh MC225.  This amplifier uses a quad of 7591 tubes for a about 25-30wpc of sublime sound.  However cost may be higher than your budget.

Good to have choices !

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