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
Guido - You flatter me by suggesting I blog about my new amplifier. I have neither the hearing acuity, comparative experience or verbal flourish to carry forth a worthy monologue. I will instead refer interested parties to the opinions of Roy Gregory who convinced me of the merits available in the Continuum S2. Perhaps others will be as motivated as I was.
Here's the link:
http://www.pascal-audio.com/downloads/M-PRO2_Datasheet-2_1.pdf

Anyone who has ever thought about buying that last amplifier should consider this one. It is solid, compact, beautiful, and uses little energy. Mine runs cool to the touch, remains dead silent, and appears able to drive any speaker. Until now I have harbored some regrets over having sold my Concentra integrated a few years back. Now those regrets have vanished.
Macrojack..M3 is nothing more than the "third version" since the original. When D-Sonic first got off the ground all their amps, whether they were high powered mono blocks or stereo or multi-channel, were all B&O ICE. In 2011 Dennis switched out to Pascal and Abletec to the M2 models then changed the chassis designs in late 2012 to the M3 models. I made a mistake pulling the model # from the Pascal website. The XPRO-1 is the correct mono model in the M3-1500M.
Guido..you need to chill out. I only get sarcastic with you
when you get into your over patronizing manner with Gon members. I'll continue to comment with my sarcastic manner when needed. "Mayflower Manner's" does not apply here.

Stats on the D-Sonic M3-1500M/PASCAL XPRO-1.
Output power.
1500 watts at 8 ohms.
2400 watts at 4 ohms.
Peak output voltage is 160 volts.
Peak output current. 30 amps.
Voltage Gain is 32db's.
Input impedance is 60 kohms.
Dynamic range is 120 db's.
Sensitivity is 2 volts.
Damping factor is at 1000.

Stats on the D-Sonic M3-600M/ABLETEC ALC-1000
Output power.
600 watts into 8 ohms.
1200 watts into 4 ohms.
Peak output voltage is 100 volts.
Peak output current is 24 amps.
Voltage gain is 32 db's.
Input impedance is 60 kohms.
Dynamic range is 120 db's
Sensitivity is 2 volts.
Damping factor is 600.
My apologies, everyone. I inadvertently (carelessly?) provided the wrong link in my las post above. The Roy Gregory review of the JRDG continuum S2 is linked here:

http://jeffrowlandgroup.com/us/documents/reviews/JRDG_ContinuumS2_01-2014.pdf

I hope it helps with the comparison.
I just want to summarize what we've determined thus far in this thread concerning which power modules are utilized in various class D amps:

DSonic M3-1500M mono-blocks($1,375ea) use the Pascal XPRO-1 modules

DSonic M2-600M and the newer M3-600M mono-blocks ($975/ea.) are the same amps and both use the Anaview/Abletec ALC-1000-1300 modules.

According to a forum reply I read on www.diyaudio.com by Pabo, the current CTO and founder of Anaview(which owns Abletec), the ALC-1000-1300 has been discontinued and will be replaced with a new module, the AMS-1000, that's due out late summer of this year. It will be available for purchase at Profusion in the U.K. and possibly Shaw in the U.S. Current estimated price is $400-425 but has both the power modules and smps modules already integrated on the board.

This may cause DSonic to utilize this new module or substitute another module if they have insufficient supplies of the original Abletec ALC-1000-1300 modules.
The forum thread is at thttp://www.diyaudio.com/forums/class-d/190182-abletec-alc1000-any-experience-8.htmlhread

Aluminati Sound 'X-1' stereo custom amp build ($2,000 estimate) will use the newer and smaller Pascal SPRO-2 stereo module.

JRDG Continuum 2 Integrated amp ($4,900) uses the Pascal M-PRO2 stereo module?

I've noted this listing with a '?' because I think this needs verification. According to Matt Kraemer of Aluminati Sound, the JRDG Continuum 2 uses the newer SPRO2 module, which is the same module he'll be using in his new 'X-1' custom stereo amp build due out in mid- July of this year. Unless Macrojack knows for certain his Continuum 2 amp uses the Pascal XPRO2 module, I'll try to confirm with Matt Kraemer.

Guido,

I think your class D spreadsheet is a very worthwhile effort and just want to be assured you have accurate information for it. Is your spreadsheet available online or is it only for personal reference?

Thanks,
Tim

Macrojack,

I think your idea of using an Oppo 105 as an interim dac solution, rather than purchasing the expensive internal JRDG option right now, is a very good one. I own the same unit and can vouch for its very good performance as a stand alone dac and as a digital media renderer and player.

Its internal top of the line Saber 3018 dac chips are capable of up to 24bit/192khz, even DSD with free software upgrade, decoding and playback. It has an asynchronous USB input (including a wireless dongle) and also utilizes a 32 bit digital remote volume control to prevent any musical information from being lost or affected.

I stream my entire cd collection, and several FLAC and WAV hi-res files, from a Synology NAS to the Oppo with excellent functional and sq results.

Everyone, please feel free to reply on any errors I may have made above.

Thanks,
Tim
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