Are we on the verge of a SS revolution???

maty · « **Reply #220 on:** 15 Mar 2018, 02:56 pm »

My message to support, https://www.psaudio.com/contact/

Subject: PS Audio Stellar M700

Quote

Hi from Spain

I do not understand what is sought with the harmonic profile of said
amplifier and that it appears in Stereophile measurements.

In the forums of Audiocircle I commented my enormous strangeness.

- maty -

maty · « **Reply #221 on:** 15 Mar 2018, 02:56 pm »

I forget the link! Now I send a new message.

Subject: PS Audio Stellar M700, the Audiocircle link

Quote

Hi,

I am sorry. The link is:

http://www.audiocircle.com/index.php?topic=156250.msg1673278#msg1673278

- maty -

Roninaudio · « **Reply #222 on:** 15 Mar 2018, 03:12 pm »

Quote from: Tomy2Tone on 15 Mar 2018, 02:51 pm

What are the m700’s currently driving? I think you mentioned earlier you used the S300 with Dynaudio but then upgraded both speakers and amps if I read that right. And are you using the Direct Stream as volume control?

Originally, I did use the DSD as the volume direct to the 700s. With Dyn C1s, this produced a edgy sound (too bright as well) especially at volume. I now have the DSD running to a Cary pre-amp (perhaps upgrade to the BHK pre one day, not sure) then (all XLR btw , which made a difference) to the 700s. Many run the DSD direct to their amps and follow the motto "the best pre is no pre". I can't argue that, It just did not result in optimum sound for me. The amps power Wilson Sabrina's which can dip well into 2 ohms.

Impedance: 4 ohms nominal, 2.53 ohms minimum at 139Hz. Sensitivity: 87dB/W/m at 1kHz. Frequency response: 31Hz–21kHz, ±3dB, Room Average Response

maty · « **Reply #223 on:** 15 Mar 2018, 09:52 pm »

Response received: they send the message to the expert.

[Review] PS Audio Stellar M700 Mono Power Amplifiers

https://www.soundstagehifi.com/index.php/equipment-reviews/1138-ps-audio-stellar-m700-mono-power-amplifiers

BHK Labs Measurements: PS Audio Stellar M700 Mono Amplifiers

https://www.soundstage.com/index.php?option=com_content&view=article&id=1836:bhk-labs-measurements-ps-audio-stellar-m700-mono-amplifiers&catid=97:amplifier-measurements&Itemid=154

Stereorephile graphs do not have peaks at HF! Here yes, like the Icepower specs.

Chart 5 - Distortion and noise spectrum

1kHz signal at 10W into an 8-ohm load

maty · « **Reply #224 on:** 15 Mar 2018, 10:06 pm »

~~With Icepower class D module too.~~ Hypex Ncore.

Bel Canto e.One Ref600M power amplifier Measurements

https://www.stereophile.com/content/bel-canto-eone-ref600m-power-amplifier-measurements

Fig.7 Bel Canto e.One REF600M, spectrum of 50Hz sinewave, DC–1kHz, at 100W into 8 ohms (linear frequency scale)

BHK Labs Measurements: Bel Canto Design e.One REF600M Mono Amplifiers

https://www.soundstage.com/index.php?option=com_content&view=article&id=1515:bhk-labs-measurements-bel-canto-design-e-one-ref600m-mono-amplifiers&catid=97:amplifier-measurements&Itemid=154

Stereo mode 1kHz signal at 10W into a 4-ohm load

maty · « **Reply #225 on:** 23 Mar 2018, 05:22 pm »

One week later and PS Audio keeps silence.

maty · « **Reply #226 on:** 23 Mar 2018, 05:25 pm »

Bel Canto Design Black ACI 600 integrated amplifier Measurements

https://www.stereophile.com/content/bel-canto-design-black-aci-600-integrated-amplifier-measurements

Quote

Fig.9 Bel Canto Black ACI 600, analog input, THD+N (%) vs frequency at 20V into: 8 ohms (left channel blue, right red), 4 ohms (left cyan, right magenta), 2 ohms (gray).

and...

Only $25,000. Here there are not tubes.

wushuliu · « **Reply #227 on:** 23 Mar 2018, 08:07 pm »

How's the verging going? We there yet?

12 pages and I'm still not sure what's going on. Some of these threads are like watching Netflix.

Wind Chaser · « **Reply #228 on:** 23 Mar 2018, 08:14 pm »

Short attention span? The revolution has come and gone and you've been - LEFT BEHIND!!

wushuliu · « **Reply #229 on:** 23 Mar 2018, 08:16 pm »

Quote from: Wind Chaser on 23 Mar 2018, 08:14 pm

Short attention span? The revolution has come and gone and you've been - LEFT BEHIND!!

That would explain my hairpiece (uncredited).

maty · « **Reply #230 on:** 24 Mar 2018, 09:07 am »

[The administrator warns me not to duplicate the posts, ~~so only the links~~]

JohnR · « **Reply #231 on:** 24 Mar 2018, 09:12 am »

Quote from: wushuliu on 23 Mar 2018, 08:07 pm

12 pages and I'm still not sure what's going on.

H2s and H3s are battling it out with buffers and power supply chips, and no side is backing down. Radar charts have just been deployed in a surprise move to baffle the enemy.

maty · « **Reply #232 on:** 24 Mar 2018, 09:32 am »

Much SNR -> more details, more soundstage...

This week,

http://www.rohm.com/web/global/news-detail?news-title=industrys-first-power-supply-ics-for-high-fidelity-audio&defaultGroupId=false

That is why I find it so incomprehensible that some brands, after adding a BAD buffer to the modules they buy from others, damage the harmonic profile and, even more, the SNR!

With class D power amps one expects not to see harmonics and a very high SNR.

My choice are even: emotion, you add them via preamplifier. If SET design (tubes or SS) -> H2 predominant. Usually in class A.

maty · « **Reply #233 on:** 24 Mar 2018, 09:41 am »

Re: What is the MEGAschino Cherry ? by LarryD56

http://www.audiocircle.com/index.php?topic=149935.msg1675151#msg1675151

AmpDesigner333 · « **Reply #234 on:** 24 Mar 2018, 12:25 pm »

Quote from: Don_S on 11 Mar 2018, 01:10 am

Do you really want to start this debate all over again.

I guess 17 posts before it hits the Intergalactic Waste Bin.

12 pages and 4000+ page views later....

gregfisk · « **Reply #235 on:** 25 Mar 2018, 07:57 am »

Quote from: JohnR on 24 Mar 2018, 09:12 am

H2s and H3s are battling it out with buffers and power supply chips, and no side is backing down. Radar charts have just been deployed in a surprise move to baffle the enemy.

poseidonsvoice · « **Reply #236 on:** 25 Mar 2018, 12:46 pm »

Greg,

I quite agree. John R’s comment is off the charts hilarious

I am also convinced now that any thread that maty participates in, ends up becoming his blog or “sub” blog. I’m sure he has a following, kind of like a newscaster. Get out the popcorn!

Best,
Anand.

brother love · « **Reply #237 on:** 25 Mar 2018, 12:58 pm »

Quote from: poseidonsvoice on 25 Mar 2018, 12:46 pm

... I am also convinced now that any thread that maty participates in, ends up becoming his blog or “sub” blog...

And I never knew that the cookie monster never met a graph that he didn't love & post ad nauseam about!

poseidonsvoice · « **Reply #238 on:** 25 Mar 2018, 01:02 pm »

Quote from: brother love on 25 Mar 2018, 12:58 pm

And I never knew that the cookie monster never met a graph that he didn't love & post ad nauseam about!

Yup. It’s all good though. I’m all about the education. That being said I use honest fellas in the industry to guide me, only because non contexual discussions can easily lead to obfuscation, misinformation, and misinterpretations.

Best,
Anand.

maty · « **Reply #239 on:** 25 Mar 2018, 01:40 pm »

To the flat Earth believers:

IcePower 1200AS2

https://icepower.dk/support/download-page/

[PDF] https://icepower.dk/download/5748/ , page 12

1200 watts/4 Ohms -> SNR: 127dB "A weighted" -> V= 69,282 v

with 1 watts/4 Ohms -> V=2v

-> 127dB - 20log(69,282v/2v) = 127dB - 30.791dB = about 96 dB "A weighted"

to compare

1 watts/8 Ohms -> 93 dB "A weighted"

With class AB, 93 dB "A weighted" is very very good. With class D is very good, I think.

How much the others?