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  #11  
Old 11-18-2014, 11:30 AM
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Originally Posted by Masterlu View Post
At 770 lbs they won't be tiny.
Good lord, 770 lbs? That's unreal.......can't wait to see a picture of the inside of these things. Maybe he lined the chassis with lead for "structural integrity"!

- Buck
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Library: Speakers: Avalon Acoustics Isis, Subwoofers: (2) REL Acoustics 212SE Amplification: D’agostino Momentum preamplifier, D’agostino S250 stereo amplifier Digital: dCS Rossini CD/SACD transport, dCS Rossini DAC/streamer/master clock. Analog: Brinkmann Taurus table, Lyra Etna Lambda, Audio Research Ref. Phono 3
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  #12  
Old 11-22-2014, 10:36 AM
TOGA TOGA is offline
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They come as three chassis per channel.
The power supply as a base and two half-width chassis on top per channel.
The copper and aluminum design will be similar to their integrated amp . Which copper is not place at outer edge, but sandwiched between aluminum .
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  #13  
Old 11-22-2014, 01:41 PM
Still-One Still-One is offline
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Originally Posted by TOGA View Post
They come as three chassis per channel.
The power supply as a base and two half-width chassis on top per channel.
The copper and aluminum design will be similar to their integrated amp . Which copper is not place at outer edge, but sandwiched between aluminum .
Dan's use of copper is not just for looks. Copper's temperature is very stable and by attaching some critical parts to the copper their is a performance improvement.
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  #14  
Old 06-08-2015, 11:21 AM
wizard wizard is offline
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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!

From Meet Your Maker - Dan D'Agostino interview | Hi-Fi+
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  #15  
Old 06-08-2015, 11:35 AM
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GeAllan70 GeAllan70 is offline
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Originally Posted by Still-One View Post
From my experience all watts are not created equal and all amps do not handle the same loads.
Can't even begin to imagine the size of the Mc Amp Stands you would need under those Helius D'Agostino Beauties......

G
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  #16  
Old 11-13-2015, 09:27 AM
raidho raidho is offline
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Mono and Stereo High-End Audio Magazine: Dan D'Agostino Momentum M400 power amplifier NEW



mono 400 watt vs 300 -> make sense?

Personaly I think that's only a marketing operation!
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  #17  
Old 11-13-2015, 10:55 AM
ct991 ct991 is offline
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Quote:
Originally Posted by raidho View Post
Mono and Stereo High-End Audio Magazine: Dan D'Agostino Momentum M400 power amplifier NEW



mono 400 watt vs 300 -> make sense?

Personaly I think that's only a marketing operation!
Recently, one of the dealers told me about the M400 option. Keep in mind that the price is proportionally higher (to increase in watts) as well.
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  #18  
Old 11-13-2015, 01:16 PM
Still-One Still-One is offline
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I will probably have my amps upgraded to the new spec at some point depending on the final pricing. Discussed this with my dealer at his event last Friday.
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  #19  
Old 11-13-2015, 02:49 PM
raidho raidho is offline
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more watt, more power,....but is very necessary have 100watt extra?

in place of watt more damping factor (new trafo,ecc...) but if the price of the "upgrade" if 10k or more is reallly not necessary.


Still-one I think that your Wilson are well now with a great sound and 100watt dont give you better quality. with 10k you can have better sound with other "gears" or acoustic parts for your "room".


I see this Dag "evo" like Magico make with the new MK2 speakers serie!
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  #20  
Old 11-13-2015, 03:19 PM
Still-One Still-One is offline
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Quote:
Originally Posted by raidho View Post
more watt, more power,....but is very necessary have 100watt extra?

in place of watt more damping factor (new trafo,ecc...) but if the price of the "upgrade" if 10k or more is reallly not necessary.


Still-one I think that your Wilson are well now with a great sound and 100watt dont give you better quality. with 10k you can have better sound with other "gears" or acoustic parts for your "room".


I see this Dag "evo" like Magico make with the new MK2 speakers serie!
I have no need for extra power. I see it as getting a upgraded transformer and other better parts that Dan has identified. Technology does not stand still. Whether I do it will depend on what other system changes I may desire.
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