New Bruno Putzeys - Lars Ribo - Lyngdorf 8 X 400 Class D amp! - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 24 Old 02-06-2019, 10:57 PM - Thread Starter
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New Bruno Putzeys - Lars Risbo - Lyngdorf 8 X 400 Class D amp!

From Peter Lyngdorf’s Facebook page:

“Today we show the prototype Lyngdorf 8 x 400 Watt class D amplifier based a new patented class D amplification technology which is the brainwork of my co-founders of Purifi Audio, Bruno Putzeys and Lars Risbo. This is the first of any class of audio amplifier which is completely indifferent to frequency, level and impedance variations. The actual performance is difficult to measure due to limitations to even the best test equipment (AP555). But we are specifying max 0,00015% THD+Noise, at ANY frequency 20-20KHz at 100 W/4 ohms. Intermodulation distortion WAY below any other technology. Notice the output impedance - scaled in micro Ohm!”

https://www.purifi-audio.com/

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post #2 of 24 Old 02-07-2019, 08:12 PM
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wow that sounds like a team and a heck of an amplifier design. On the other hand, the existing hypex modules are already excellent but not as quiet as the Benchmark AHB2.

This new amp sounds like it is designed to be just about everything out there ... perfection? 8 channels... nice.

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post #3 of 24 Old 02-07-2019, 11:02 PM - Thread Starter
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http://www.aes.org/events/141/presenters/?ID=5036

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post #4 of 24 Old 02-08-2019, 05:31 AM
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building loudspeakers since age 3... being into this stuff from a young age myself, I think that there is no substitute for time/experience in this arena.

The team and their capabilities could lead to some cool stuff, albeit likely to be priced high (for design) where Lyngdorf is concerned.

8 Amplifiers that are "end all" in quality, if they could be had for around $500-600 a channel would be highly competitive. Curious what they come up with.

Both ATI and NAD products are currently good choices with hypex modules and they run around $500 a channel last I checked. ATI's is the best option for rack mount installation.

I would hope they produce something in that price region that is rack mountable. That could be a great amp to look out for in the new house we are creating for my brother which will be ready in a couple of years.

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post #5 of 24 Old 02-14-2019, 08:00 AM - Thread Starter
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Looks like the first of these new amplifiers is coming out from Lyngdorf soon:

https://www.widescreenreview.com/new...l.php?id=21552

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post #6 of 24 Old 02-14-2019, 04:49 PM - Thread Starter
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More info thanks to Bulldogger's online research:

https://www.diyaudio.com/forums/clas...plifier-3.html
noah katz, RUR and jeno like this.

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post #7 of 24 Old 02-21-2019, 05:04 PM
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Major difference seems to be better measured high frequency performance. Better specs overall with 25db more negative feedback. I'm sure it is a great amp, with the designers involved.

Never become so involved with something that it blinds you.
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post #8 of 24 Old 02-21-2019, 09:35 PM - Thread Starter
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Quote:
Originally Posted by Bulldogger View Post
Major difference seems to be better measured high frequency performance. Better specs overall with 25db more negative feedback. I'm sure it is a great amp, with the designers involved.
Too bad my 65 year old ears can not hear much above 10k!!!

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post #9 of 24 Old 02-22-2019, 02:28 AM
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Quote:
Originally Posted by steve bruzonsky View Post
looks like the first of these new amplifiers is coming out from lyngdorf soon:

https://www.widescreenreview.com/new...l.php?id=21552
q1 2020.
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post #10 of 24 Old 06-28-2019, 02:10 PM - Thread Starter
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Meeting the Experts of Purifi in Munich

https://audiophilestyle.com/ca/bits-...n-munich-r801/

PURIFI Audio and the Audiophile Style reader's Q&A with Lars Risbo & Bruno Putzeys

https://audiophilestyle.com/ca/bits-...-putzeys-r815/

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! 9.4.13 Trinnov Altitude 32 Theatre renovation/upgrade starts end of July 2019!

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post #11 of 24 Old 06-30-2019, 07:45 AM
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he's a putz

mark
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post #12 of 24 Old 07-04-2019, 10:51 PM - Thread Starter
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https://www.audiosciencereview.com/f...mplifier.7984/
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post #13 of 24 Old 07-06-2019, 01:24 PM
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Quote:
Originally Posted by Steve Bruzonsky View Post

Does this amp use the new Putzeys/Ribo design?

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post #14 of 24 Old 07-06-2019, 02:20 PM
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Quote:
Originally Posted by noah katz View Post
Does this amp use the new Putzeys/Ribo design?

Should be Putzeys/Risbo. As you probably know, the OP can't edit the title of a post so Steve can't fix the Risbo typo.



More important: From my reading of the linked review the answer is yes.



A very quick summary, the Purifi offers lower distortion than the N-Core design as highest power output is reached. S/N ratio is very slightly worse than the Benchmark AHB2. Purifi's twin-tone IMD is extremely low--probably the lowest ever.


Jeff

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post #15 of 24 Old 07-06-2019, 02:25 PM - Thread Starter
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The real question is will these new amp modules sound better than the NCore - or are they simply new modules from a new company in competition with NCore?

https://www.avsforum.com/avs-vb/show....php?t=1158431 No dealer is authorized to tell you I refer to them - any referrals I make will be done personally by me. Over the years I have found certain dealer(s) who I cannot recommend for good reason.
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post #16 of 24 Old 07-06-2019, 02:41 PM
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Quote:
Originally Posted by Steve Bruzonsky View Post
The real question is will these new amp modules sound better than the NCore - or are they simply new modules from a new company in competition with NCore?

A couple of years ago I had a conversation with Bruno about amplifiers. He told me then he could make a better amplifier than N-Core but wondered himself if a better amp would have any sonic meaning. In the link you supplied I believe AmirM wrestles with the same question. If N-Cores non-linearity is all below our discrimination threshold should we care that Purifi measures better?


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post #17 of 24 Old 07-14-2019, 03:01 PM
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Amplifier performance has been below our discrimination threshold for a couple of decades.
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post #18 of 24 Old 07-14-2019, 03:41 PM - Thread Starter
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Amplifier performance has been below our discrimination threshold for a couple of decades.
Gee, I guess I was imaging when I initially got two Theta Digital Prometheus monoblocks (NCore/Hypex 1200) early 2014 and quickly noticed how they sounded better than the Theta Citadel 1.5 monoblocks I already had for my front left and right. Sounded so good that I then ordered three more of the Prometheus to replace my other three Theta Enterprise monoblocks!

Sounds like you are saying all amplifiers sound the same if equivalent power. You are certainly entitled to your own opinion of course (and hopefully me mine).

I do agree that amplifiers like people should not discriminate!

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post #19 of 24 Old 07-14-2019, 05:18 PM
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Gee, I guess I was imaging when I initially got two Theta Digital Prometheus monoblocks (NCore/Hypex 1200) early 2014 and quickly noticed how they sounded better than the Theta Citadel 1.5 monoblocks I already had for my front left and right.
Well, that would be a good guess as it is by far the most likely explanation. That's ok, happens to me too.

I probably shouldn't have dropped a comment in this thread as it isn't really good form given the nature of this particular forum. The door was cracked open just a little too wide to resist nudging it further. Sorry.
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post #20 of 24 Old 07-14-2019, 05:23 PM
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As an aside, it's a little amusing seeing amirm pondering whether 0.00000001% distortion may finally be an inaudible improvement over 0.00000005%. As a guy who always "talked" the scientific method, facts, and objectivity he had the hardest time letting go of the believe in audibility of tons of things are simply aren't.
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post #21 of 24 Old 07-15-2019, 08:00 AM
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Quote:
Originally Posted by Steve Bruzonsky View Post
Gee, I guess I was imaging when I initially got two Theta Digital Prometheus monoblocks (NCore/Hypex 1200) early 2014 and quickly noticed how they sounded better than the Theta Citadel 1.5 monoblocks I already had for my front left and right. Sounded so good that I then ordered three more of the Prometheus to replace my other three Theta Enterprise monoblocks!

Sounds like you are saying all amplifiers sound the same if equivalent power. You are certainly entitled to your own opinion of course (and hopefully me mine).

I do agree that amplifiers like people should not discriminate!

Your system sounded different when driven by Prometheus because it had very different frequency response. The Citadel 1.5's with no global feedback had a very high output impedance. Thus every speaker they drove had an unintended active equalizer in series with the output. Prometheus has extremely low output impedance and minimum frequency interaction with the load.



From my experience it's also true that N-Core amps, at least as designed by Morris/ATI, sound more dynamic than most other amplifiers.


It's also true that you were the first Theta customer to notice the differences.



Jeff
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post #22 of 24 Old 07-15-2019, 08:30 AM - Thread Starter
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Your system sounded different when driven by Prometheus because it had very different frequency response. The Citadel 1.5's with no global feedback had a very high output impedance. Thus every speaker they drove had an unintended active equalizer in series with the output. Prometheus has extremely low output impedance and minimum frequency interaction with the load.



From my experience it's also true that N-Core amps, at least as designed by Morris/ATI, sound more dynamic than most other amplifiers.


It's also true that you were the first Theta customer to notice the differences.



Jeff
In all fairness I received the very first two Prometheus out of the factory - and within a day or two realized how outstanding they sounded, somewhat different and I thought better than the Citadel 1.5s, so I quickly ordered three more to replace my three Enterprises at center and surround!

Regarding what you are saying re frequency response, makes total sense! The improvement I heard was hardly just frequency response, but 3D imaging was more real and more like a live concert in an excellent sonic venue!

These days, if I change out any components, aside from using room correction measurements (Dirac with my prior Theta CBIVA SSP, Optimizer with my current Trinnov Altitude 32), I also use my ears with this test disc with frequency test tones from low to the very highest: https://www.highresaudio.com/en/albu...es-system-test

Interesting is that using that test disc, with my prior Theta CBIVA SSP, I could hear 8 kHz clearly, and 10 kHz maybe 50%, nothing above (last March when I reinserted CB for 10 days or so as my new Trinnov SSP was in for a minor repair and addng channels); whereas with the Trinnov SSP I can hear up to 12 kHz clearly but nothing beyond. I wonder does this also have to do with output impedance?

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post #23 of 24 Old 08-15-2019, 02:51 PM
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I stumbled on to an interview with Bruno Putzeys and Lars Risbo of Purifi. If you're interested you may follow along here:


https://audiophilestyle.com/ca/bits-...-putzeys-r815/


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post #24 of 24 Old 08-15-2019, 03:02 PM - Thread Starter
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Much Aclaimed New Purifi 1ET400A based Nord Amplifiers now available from Bruno Putzeys new Company Purifi https://www.nordacoustics.co.uk/purifi1et400aamplifiers

DIY modules to be available 4th quarter this year.

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