Tube Amp for Martin Logan Speakers


Hi, I love tube sound through my Martin Logan Aerius-i fronts and Cinema-i center. I currently have a Butler 5150 which is a hybrid, but it busted on me and would cost $700 to fix. I've had china stereo tube amps that were pretty good and gave true tube sound, but not enough drive for higher volumes. I live in condo, so not like I can blast music anyways but still. I got the Butler because I wanted 5 channel tube sound for home theatre (The piercing sound from my Denon 3801 receiver was not pleasant to my ears). It appears there are only three multi-channel tube amps around, from Mcintosh, Butler 5150, and Dared DV-6C. The latter two are hybrids, and the last one was one of the worst tube amps i've ever heard. I have no clue why 6Moons gave the Dared a 2010 award, but maybe it's because it produces only 65W.

So since multichannel tube amps are hard to come by, and they tend to be hybrid, I was thinking maybe it would be best to get three true tube monoblocks to power my fronts. Thing is I wonder if they will be underpowered for my speakers, and not sure which ones are decent for the price. Maybe China made ones would suffice, and they still go for pretty expensive price. I'm wondering if anybody knows of a decent powerful tube monoblock that is affordable, because I can't pay $3000 per block. or maybe best to just repair my Butler. Thing is, I'm not confident that it is reliable. The tubes are soldered in which is weird, and i've taken it to a couple repair guys who both said that the design is not good, because it's very tight inside and more susceptible to being fried from DC voltage areas. it's too sensitive.

Any suggestions for tube monoblocks, even if china made ones? the holy grail for me would be Mcintosh tube amp, but they are hard to come by. Thanks.

smurfmand70

Showing 5 responses by smurfmand70

Wow I want to thanks all who have responded, much appreciated. It looks like monoblocks are too expensive and means id have to power each one on manually. I know you can get some unit to power things on but I'd like to have the simplest solution with acceptable warm flat sound. A good solution might be to get stereo tube amp for the fronts and just use my denon for centre and rears. Just wish there were more multichannel tube amps, because then the sound from 5.1 would be more even between the speakers but I guess it would be too massive in size and not as reliable.

I spoke to a reputable amp repair guy I'm my area and he says that warm sound can be had from SS by maybe replacing some parts. Says that tube amps are not reliable as most have to be hybrid in order to dish out a lot of power. I'm not very technical in this aspect. All I know is that with my denon 3801 with about 150w or so at 4ohm and listening to Chris botti 5.1, when Yo Yo Ma begins playing, the cello doesn't sound as deep and full as when I was using the butler 5150 with 225w. With the Dared multichannel hybrid at 65w per channel. it was even worse. The repair guy suggested get affordable parasound SS and make some relatively cheap mods, as he says the design is decent and easier to repair than other brands.
I could repair the butler locally and add sockets for the tubes for easier maintenance. I'm just not too confident in its reliability. Seems that it's very sensitive and can blow if moving it around or playing with cables. The other option is send back to butler so they fix back to original spec but that would probably cost more than 700. a lot cheaper than getting monoblocks, and about same price as getting a used SS amp.

I've read that martin logan have demo'd their speakers with parasound which apparently has warmer sound as opposed to say lexicon and nad amps, so maybe should look into that.
Im shocked at how much tube monoblocks go for new. I don't get how it is justified for makers to charge 3000-10000 for such a small thing. Compared to SS amps that are massive and with more parts. I guess tube monoblocks have solid gold power sections or something.
Yeah different technology but still seems like companies are ripping people off with tube monoblocks. If $10000 each and you need two, I'd rather get $18000 gold bar to hang around my neck and $2000 used amp haha
Nice ISO hehe. I just think there better be gold in thems monoblocks to justify the super high price. Tubes $300-400, circuit boards and wiring $20, power transformers $1000, metal case $100. Where is the rest of the 15,000 going to?