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
noble100
Tim - When choosing your next amplifier, you might find that the Rowland is a wiser choice for a number of reasons. In my own experience, I was able to realize a very significant upgrade by moving from Hypex NC 400 monos to the stereo Continuum. In both cases, I used a Capri preamp but the latter case included the more recent and reputedly superior Capri S2 in board. While I'm sure that made a difference, I think the improvement in amplifier selection was greater. Since you do not intend to employ a preamp at all, perhaps this has no meaning in your pursuit. On the other hand, I would not overlook the Rowland implementation as an important factor, nor would I fail to consider the notoriously high Rowland resale. As one who has purchased his 26th final amplifier upgrade, I have become sensitive to that consideration. All of the Rowland gear is manufactured and serviced in Colorado Springs and Jeff himself handles every piece.
Unless there is an unworkable gap in pricing consideration, I would certainly prefer JRDG after my recent comparison.
Guido,

I think I should limit by internal sleuthing of class D amplifiers' internal power modules lest I convict the innocent and acquit the guilty.

After a second look, it seems the Pascal SPRO-2 power board (250w@8ohms,500w@4ohms and bridgeable to 1,000w)was released in Feb of 2013. The JRDG 525 stereo amp (250w@8ohms,500w@4ohms and bridgeable to 1,000w) was released/announced at CES in March of 2013. I would think that Pascal, being the OEM for Rowland, had sufficient time to supply Rowland with enough of these new modules to begin production. I was unable to visually compare internal photos of the 525 amp components to photos of the Pascal SPRO-2 stereo power boards, however, it seems reasonable to conclude that the Rowland 525 stereo amp utilizes the Pascal SPRO-2 module based on the products' release dates and identical power ratings.

I did not find any info suggesting the 525 uses the Pascal older XPRO-2 modules.

I'm having a hard time, however, finding published reviews on either the 525's or the Pascal module's sonic characteristics.

Kuribo,

While sq is my primary criteria in choosing a new amp, I'm not immune from the ascetics of a component, especially when it will be prominently visible in my rack whenever I'm listening to music or using my ht. I realize I will pay a premium for this benefit but it will not be excessive with the Alumanati amp build (about $2,000 for the same Pascal amp module, and similar anodized aluminum casework, as the JRDG 525 amp currently priced at approx. $5,000). It seems like a bargain to me, even though I realize I won't be getting the exact same value added internal components, technology or sq as the Rowland.

Macrojack,

I agree with you about the desirability of the Rowland 525 itself over an Aluminati amp build. I don't think doubling my budget is currently feasible but I think a used or demo 525 at a reduced price will be added as my option#5. I'm not overly optimistic about finding one, though, and certainly will not be holding my breath.

Thanks for the assistance all,
Tim
Hi tim, ;there are a couple of reviews on S-Pro2 amps available...

Nothing in English on M525 yet, but you should be able to download a German language review of M525 at:
http://jeffrowlandgroup.com/kb/getattachment.php?data=NzExfEpSREctQ292ZXItQ2FwcmktTTUyNS1oaWZpK3JlY29yZHMtMjAxMy0wMy1sb3Jlcy5wZGY%3D
there is also tech info on M525 at:
http://jeffrowlandgroup.com/kb/categories.php?categoryid=214

The Gato DIA 250 integrated is also based on Pascal S-Pro2. You will find it reviewed in the last few pages of the 6Moons article at:
http://www.6moons.com/audioreviews/gato3/1.html
Hi Guido,

My current german skills were not sufficient to gather much info from the German language review you attached. However, the 6Moons comparison of the Gato DIA400 vs the DIA 250's sonic impressions were more helpful but required a bit more study to comprehend. I was able to decipher Srajan Ebaen's sonic impressions and descriptive variances between the two and found that my sonic system preferences are in tune with his and that I'm seeking a system sound that is more in-line with the DIA 250's than the DIA 400's.

That is, I would like my system to be detailed and transparent even if that means not all of my recordings will sound as good and some of my upstream components' weaknesses may be exposed.

I believe my system preferences are evolving from one that wanted a sound a touch on the warm side of neutral to one that is more accurate and detailed with warmth provided by the music/recording if it exists at all; I don't want to color the sound.

The section of his review concerning 'class D flavors' was particularly helpful in coming to this realization. It appears the Pascal SPRO-2 power modules, contained in the DIA, may be to my liking in tis regard. But, the Hypex nc400 and Abletec modules may also be suitable as well; it's hard to be sure without hearing them.

My current system(24 bit/96khz files via a Synology NAS processed via an Oppo 105, output direct via xlr to a CDA high powered amp that drives Magnepan 2.7qr speakers)is supplying a detailed, dimensional and palpable sound on well recorded music. My current favorite is a Carmen Gomes hi-res file called 'A Thousand Shades of Blue'. Some of my ripped cds have less of these qualities, which I understand is to be expected.

Thanks for the referenced materials, I think I'm getting closer to an informed choice.
Tim

Hi Tim, in case you opt for an amp based on Pascal S-Pro2, note that while S-Pro2 supports bridged-to-mono operations, and would deliver about 1000W/8 in this mode, it does not mean that bridged functionality is inherently supported by any particular emplifier using this module.

If you are thinking of adding a second unit for more power at a later time, and using the amps as monos, you need to make sure that the manufacturer supports bridging, lest you get an unwelcome late surprise. Rowland M525 is bridgeable, but I have no information on Aluminati X-1.

Saluti, G.