Dan D'Agostino Helius dual monoblocks, 1500w @ 8ohms

Rated at 1500W/8 ohm - 20 000 W /1ohm. Heavy league 350 kgs with the price of $250.000. And around 30 of them sold already !!!!!!!!


Cheers George
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Beyond belief for mere mortals! I hope to hear them someday.
I really love the high-end and I'm not being facetious. So much of it just cost so much money. If I had the money I would love to listen to the ultra expensive stuff and let my ears decide. I'm a firm believer that incremental improvements cost some serous money. The improvements aren't worth it to some.  For those that can afford it, I understand.
10x higher price for 10% greater quality.

That's the equation for just about everything technological and it also holds true in audio.
I agree, 10x higher price for 10% greater quality or maybe less. If the buyer thoroughly enjoys it, it’s priceless.

They forgot to mention you need your own nuclear power plant to power them.

Meet Your Maker - Dan D'Agostino interview Exclusive talk with the top amplifier designer
by Alan Sircom | Jun 01, 2015

What’s next?

The next thing I’m going to build is a new product line called the Progression, set to be priced somewhere between $10,000-$20,000. The first product in the line will be a big mono power amplifier, similar to a Momentum but costing somewhere around $16,000-$18,000. And it will be very powerful. I’m hoping that will appear before the end of the year – I’ve told the factory ‘August’, which means I’ll probably finish it in late November!

Once the Progression line is done, I’ll turn my attention back to the Helius amplifier I’m building. Helius is truly a monster amplifier. It’s made of three chassis – it’s got a ‘plus’ amplifier and a ‘minus’ amplifier because it’s a purely balanced design. People say they’ve made a balanced design, but I don’t think anyone’s made a truly balanced design like this. It’s got two completely mirror imaged amplifiers that are virtually identical, only one is inverted from the other.

And then, I took the insides of the amplifier – all the bit stuff, the transformers and electrolytics and power devices and heat sinks – and put them all in one case. But no input board: the input board is inside the base, fully isolated chamber with its own power supplies, and sits below the amplifier on some suspension equipment made by Mike Lapis of HRS fame. So there’s no vibration, then it’s totally sealed with µ-metal and copper shielding around it so no influence from the amplifier.

The amplifier is built out of a solid block material, and the toroid is 10” in diameter and it’s seven inches tall. So the toroid itself probably weighs about 130lb, and that is actually milled into a block, the outside block of the amplifier; the toroid fits into a hole and is then covered.

The electrolytics capacitors, of which there are a total of 12 in the two sides, comes out to 1.2F. Each transformer is 6kW, 12kW in total. It’s got a giant copper heatsink; 10” tall, 28” long, and 1.5” thick. That’s bolted to a piece of specially designed aluminium designed for heat reduction in aircraft known as 5051, and each fin of that heatsink is milled out whilethen the base is bolted to the outside of the copper. And that’s three inches deep and of course 10” tall and 28” long – it’s a single piece. And that’s the heatsink for the output stage.

The capacitors, and power supplies are all in this great big block. If you imagine the block is 11” deep, 10” tall, 28” long – that’s where the block starts – and then it’s hollowed out to fit the transformer and the six electrolytics. Then in the back – where it’s ‘empty’ – is where the protection circuits and the hook ups and all that go, then that part is slid onto that heatsink, there’s bolts that go through the inside web of the heatsink to hold that block on, so it’s one rectangle.

If you add up all the parts, the amplifier is going to weigh 780-800lbs. Per channel. Each plus amplifier and minus amplifier has its own cord; it’s designed to run on 220V or 240V… it doesn’t run on 110V. And you need two of them for each channel.

It’s got an extraordinarily gorgeous meter on the front. It’s about 10-12” in width, and six inches high that sits on the front. It’s really strange – it’s almost Bauhaus in design, but looks like a Momentum from another dimension. This is not that big for the kind of power it will produce, though, because it will produce up to 20,000W into one ohm!

Once I get the Progression amplifiers done, this is next in line. I would love to have it ready for CES, but maybe I’ll just show the case. I have the metalwork ready. But it will definitely happen by March next year. Or maybe CES 2017!


And it doubles as an arc welder!
This news comes as no surprise to me. I haven’t met a man like Dan D’ Agostino who is so passionate about Audio. 

May be someday I get to own a piece of his audio art. 
250k thats cheap maybe ill get 2 I'm sure they will sound great as Dan makes wonderful amps.

IMO they should go for $450K to add to their mystique and to drain the one percent of their 2018 tax windfall, so the man who weaned us on KRELL can continue his work in well deserved comfort. 

Bravo big D'
Post removed 
My yacht needs a new boat anchor!

Can you possibly be anymore disrespectful to one of the respected man in the Audio industry and his lifetime of work?

I don’t find any humor in your last two posts here 👎


You need to chill.   He was only making a joke, just like I was when I said you need your own nuclear power plant to operate them.   Personally, I will quietly stick with my McIntosh at about 2% of the price of his amp.  No one was bashing Dan.

Don't get too upset by those comments. Jealousy is a terrible thing. I'm sure that many of us would love to try or own them if we had the room and the funds. At very least, they will be a thing of beauty. Of course, 95% of us wouldn't need that much power.

“Do you think it is going to sound 230K better than is 20K mono blocks?” - Hell NO.

“I guess he is trying to bulk up his bank account before he retires” - Nothing wrong with that, in fact that’s what every entrepreneur strives and hope for at the end of his life’s work.

As with all things, there is a buyer for everything. Glad to hear you’re happy with your McIntosh as I am with my ARC.


Completely agree with - 95% of us wouldn't need that much power.

Peace out!

Everyone is aware that this is an article from 2014?

For a more current exploration of cost no object amps the following was posted yesterday

But as these amps are only $120K a pair they may be too down market for most of us 🙃
Interesting...an arc welding machine that doubles as an audio amplifier.
I wonder, if all the tube guys will bite their tongues with a tube amp that cost $350K usd in 2004. SE tube amp that can't drive much at all (see measurements).

I think I'd rather have the arc welder than the feather duster and pocket $100K

Cheers George
to create quarter million buck amp isn't life time, to find idiot(s) to purchase is skill.
The arc welding reference is getting pretty old and stale...
What's really interesting is that a friend of ours is good friends with Dan's daughter. She has no clue about fine audio and when she mentioned the name I asked about his background. She said it was "something like that". I wonder if I could arrange a private listening session? (in my dreams)
Dan D'Agostino is a great amp designer no doubt, however, some of his later work at Krell is total crap, The Showcase HT processor comes to mind along with the KAV series with insufficient cooling.  The  KAV-250a, KAV-250a/3, KAV-500i and KAV-1500 were recently recalled for this problem.
That’s an old issue, nearly 10 years old. ’Recently recalled’, on a 10 year old design.

Eg, that would never really happen in most other consumer industries - that would be end of life stuff that is expected.

We know that we expect longer lifespans out of audio gear, though. We hope for 10 year old audio gear to be the equivalent of maybe mid 30’s age (compared to human lifespans). We’ve come to expect and demand it as part of the high end package..

Overstating it in the negative is not the best thing to be doing....(not that I need to be here defending anything -just sayin’, kinda thing. More like playing the other side of the reasoned debate table).
So far there are no photos of this amplifier anywhere. 
It doesn't exist.  It is a myth.

No ones even mentioned this thought; Maybe some of us have a limited range of hearing! Oh my! Could you be one of those? Really, I go to audio shows and super expensive speakers and amps don't do anything for me. Maybe, just maybe my ears aren't that great. This is the untalked about subject. Does anyone else think their ears aren't up to hearing the uber best? Joe
I find Krell to sound better than other amps on my Martin Logans.

Bought one vintage Krell from the nineties last year, and now I have 3 different designs. All Class A.

It's great that they still can be brought back to original operation at Krell or by some certified techs spaced around the USA.

I find Krell to sound better than other amps on my Martin Logans.

Most Krells are just what's needed to stay flat in frequency response driving into the .9ohm load load that nearly all ML's have in the HF.
Sure other amps will drive them, but their frequency response will look like a tone control, instead of being flat across the audio band into the ML's.

Cheers George
My Dennis Had amp is hand made and cost 1200 bucks used (it was new less than 6 months before I bought it). I realize it's somewhat less that 1500 watts (around a thousand times less actually) but serves to make the point that not all great sounding things are expensive.
Frustee, Dan disn't design every amp at Krell. There's more than one engineer there.
The good folks at McIntosh build the MC 2KW amps with nearly the exact same aproach of one chassis for negative, one for positive and one for the power supply.  Not 800 lbs or 250k but still impressive in the approach.

I used to think Krell was so awesome, and I had a Krell amp for over a decade.  But I'm over it.  The truth is, Dan D'Agostino is not in the top tier of amp designers-- he's no Nelson Pass or John Curl.   It's all about more more more and overkill.  His latest creations are the Bugatti Veyron of amps (and that's not a compliment).  And here's the sad economic reality:  a Wall Street hedge fund tricked him and pushed him out of Krell when it was in desperate shape financially, so now he's selling stuff at crazy prices to try to rebuild his fortune at a late stage in life.

Stick with Pass and Curl for the best sound.    D'Agostino and all the Swiss companies are just aiming for people who piss money away.
Your opinion, not a fact.