HYPEX,PASCAL OR ABLETEC


Knowing about the many apparently very good class D amps on the market right now and even though I'm very satisfied with my current ClassD Audio SDS-440CS amp, I'm seriously considering purchasing one of these amps to try out in my system. My thinking is that, if I do like the amp in my system, I can just use my current amp to replace an older Adcom GFA-545 that currently powers my Magnepan CC3 center channel and my unamplified (passive)sub for ht purposes. I would then always be able to choose which amp I used for my 2 ch music and which amp I used for ht(cc and sub).

Well, I should get to my point:

I'm using an Oppo105 as the master source in my streamlined A/V living room system used 40% for 2-ch music and 60% for ht. For 2-ch listening, I stream my cd collection and hi-res Flac files from a Synology NAS in another room to the Oppo. The Oppo acts as a stand alone dac and sends the analog output via xlr cables to my class D amp (440 w/ch@4ohms) which powers my Magnepan 2.7qr speakers. For ht, I use the Oppo for decoding surround sound from Netflix, Directv and bluray discs. Two class A/B amps power the Oppo's ht audio outputs to my Magnepan CC3 center channel, LFE sub and in-ceiling rear surround channels.
I've narrowed my new amp choices down to the following four listed below. I'm requesting feedback on any or all of these 4 amp options, especially from anyone who has used 1 or more in their system. My budget is $2,000 to $2,500 and my room is 18ft x 13ft with 8ft ceilings. Here are my options:

Option#1 Hypex Ncore nc400 based amp builds from James Romeyn in Utah. A stereo, dual-mono build is $1,500 total and is rated at 400 watts @ 4 ohms. It includes 2 Hypex nc400 power modules both powered by 1 nc12000 smps mounted in a generic case with a black or silver aluminum faceplate with both se and xlr inputs. A pair of mono-blocks built runs a bit under $2,000/pr. total and consists of a nc400 power module mated to a nc600 smps in each 'NCORE' labeled black case with both se and xlr inputs.

Option#2 Pascal amp build from Aluminati Sound in Ohio. This is a stereo build only that will use a new stereo board from Pascal in Denmark, called the SPRO-2, that has a smps incorporated on the board. Power output is rated at 500 watts/ch @ 4 ohms. Forecasted price is about $2,000 but may run a bit higher. Pascal modules are used in the new JRRG Continuum 2 integrated amp that has received very positive sq reviews. Alumnati is owned by 2 former CNC machinists/fabricators. Their main advantage is their case work. One of the Aluminati owners, Matt Kraemer, told me the new stereo Pascal amp is tentatively named the "X-1" and should be available for order by approx. mid July. He said the stereo case will be milled from a single large aluminum block. The finished case will have an anodized finish (think JRRG cases but milled as 1 solid piece instead of multiple anodized face panels attached to a chassis underneath. The aluminum case will have a blue power/status light mounted underneath projecting downward.

Option#3- Abletec amp modules in the DSonic M3-600M mono-blocks. I'm not certain which Abletec modules are used in these amps but the price is $1,950/pr. and power output is 600 watts/ch @ 4 ohms in black cases with a blue power/status light with both se and xlr inputs. The Abletec modules have built-in smps just like the Pascal modules. According to DSonic's owner, Dennis Deacon, the 600Ms and their top-of-the-line 1500Ms have similar sound characteristics, even though the 1500Ms use Pascal modules(likely either a MPro or XPro module).

Option#4- Identical ClassD Audio SDS-440CS amp to replace my older class A/B amp that powers my center ch and sub. This option is least attractive to me since it would mean my music amplification would remain the same and I wouldn't be auditioning any of the newer class D amp modules. If I liked option 1,2 or 3 above better for music playback, I would simply move my existing CDA music amp over to center and sub duties anyways. The only benefit of option #4 is that it's the least expensive at $630.

I've ruled out some amps, like the Wyred4Sound and Red Dragon offerings, because they use the older Ice ucd power modules typically considered sonically inferior to the newer Hypex Ncore, Pascal and Abletec power modules. Any comments comparing the sq of these options is greatly appreciated, especially if you've owned or listened to some of these. I do understand that there is more involved with how various class D amps sound than just the power modules utilized, such as high quality components and custom input stages.

I should also say, just like Audiozen, I have never actually heard a Hypex, Pascal or Abletec powered amp. I'm just curious and base my optimism on the positive reports from owners, listeners and professional reviewers. If I had a larger $10k plus budget, I'd likely just buy a completed amp based on the Hypex Ncore nc1200 power modules, such as Merrill, upcoming Mola-Mola or Acoustic Imagery.

Thank you in advance for your thoughts, comments and suggestions. Please feel free to suggest other reasonably priced class D amps I may have omitted.

Thank you,
Tim



Much like Audiozen, I am basing
128x128noble100
Hi Sebastian,

     I haven't been on Audiogon lately and just read your post.  Thank you for your very interesting and informative post.

     This thread has been active for a long time and I think it is a very good source of info for anyone contemplating the use of class D amps, whether purchased as DIY or as completed amps.  

     You stated about the D-Sonic M3-600M-A monoblocks using the Anaview AMS-1000-2600 modules: " Micro/macro dynamics, resolution, soundstage, tonal accuracy, are all at the top of the scale. But more important, there is a fluidity, an easefulness in the presentation as a whole, I only experienced in very high end systems."  I probably don't have your level of experience with high end systems, but I completely agree with your description, especially the fluidity and easefulness of the presentation.  I would only add the completely silent background noise level and the powerful dynamic range to my description of these amps.

     You obviously like your Nord One UP-500 monoblocks utilizing the NC500 modules with both the Hypex OEM and the custom Nord buffer along with a few op amp choices.  You sound like you're a bigger DIYer than I am, but I'm definitely going to research this further.  I'm especially interested in a few things:

1. Comparisons between the performance of these newer NC500 versus the  more established  NC1200 Hypex modules.

2. The cost of the Nord amps  

Thanks,
 Tim


Thanks for the write-up Sebastian.

The Magnepans are great but very sensitive to amps and room placement.  From my experience they can be bright at times, especially when not setup correctly.  I've owned a pair of 1.6qr's for over 13 years and still enjoy them.  

Although I have yet to find an amplifier that paired with them like the LSA DK Design Group VS. 1 Reference Mk II. The tube pre amp/SS amp combo brought the maggies to another level.  

I've had a few digital amps in the past, the original Nuforce (fist gen. can't recall the model) and the Tact M2150 XDM.   The Nuforce wasn't very impressive, while the Tact kept be busy with its endless room correction software.  

Lyngdorf TDAI 2200, apparently its a revamped version of my old Tact...  

The Tact was extremely detailed and completely silent, but it lacked the midrange warmth, depth and bass of the DK VS.1 integrated, you just felt "there" with the DK.  

I know the digital technology has progressed since then, Devialet made a big impact in the last years too.  Maybe the hypex might just be that leap in technology that can compete with the rich tubes and SS combo.  

A logical upgrade which I always considered was a Threshold SA/4e paired it with a tube pre amp.  Similar to  the DK VS.1 integrated.  

Although it seems the new Nord Hypex amps with the buffer and op amps could be up to the test??  Could they compete with some of the finest SS amps that Nelson Pass ever designed?

Am I grossly overrating these new digital amps or are they in fact something to strongly consider against the tube/SS combo?


I have the ClassDAudio SDS470 with upgrade PS. I have been running it for almost 2 years and it has been excellent for reliability and sound. The SDS470 is a great high value bargain for sure.

I would like to try some Class D monos. The D-Sonics look great. Does anyone know what modules are in the Channel Island D500 MKIIs? The D500 MKIIs are built like a tank at almost 30lbs each.

The Nord One Up 500 look great too. The only concerns I would have with them is they seem to run a little warm. They only have balanced inputs, nice to have both. I read somewhere that they only weigh just under 10 lbs...maybe the case work isn't the greatest or maybe the lighter weight is a non issue.

Heres a link for the Nord stuff

http://www.nordacoustics.co.uk/

Merry Christmas

Post removed 

How about the Acoustic Imagery Atsah 500

From what I under stand the Atsah uses the oem input buffer so I assume it would sound the same or very similar to a Nord One. The Atsah is so light. it weighs under 5 lbs and is quite small.  

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