[maty]

https://www.rougeaudiodesign.com/alauda-s2

FILTRO SHAFFNER - Come filtro di rete viene utilizzato uno Schaffner FN284-10/06 con interruttore a bascula bipolare, presa IEC C14 e doppio fusibile (Ø5 x 20mm). Corrente massima 250VAC, 50/60hz, 10A. Induttività nominale 0.34 mH(2x) mH. Capacità CX220 nF. Corrente derivata <373 µA. Attenuazione @ 150 MHz: 13 dB. Attenuazione @ 10 MHz: 52 dB

[PDF] http://www.farnell.com/datasheets/1851814.pdf

Page 3 -> Attenuation graphs


Schaffner FN 9244B:

https://www.schaffner.com/product-storage/datasheets/fn-9244/

[maty]

http://www.apollonaudio.com/apollon-audio-as1200-class-d-ice-power-based-amplifier/

• Power rating (single channel driven):

1200W @ 4ohm

600W @ 8ohm


• Power rating (both channels driven):

700W @ 4ohm

620W @ 8ohm

*** IMPORTANT NOTE *** The Amplifier is capable of delivering 1200W @ 8ohm when driving only one channel. As many people assume, that they get two channels with 1200W power we want to clear up this misconception, so that you will not be dissapointed when you receive the amplifier.

700 watts is the max power in stereo

Efficiency: 80%

230V at mains: 4A

115V at mains: 8A

Then the RF/EMI filter better with 8A max for all world. stereo

If DIY, in Europe, RF/EMI filter with 3A max is enough. In a BIG discoteque, 4A. stereo


but the true is:

Filter with less max amperes -> more attenuation in the power band audio, < 300 kHz

[maty]

Usually, with speakers of 90 dB only need about 10 watts continuous. We need more power to the peaks. The home amplifiers work < 1 A.

http://www.doctorproaudio.com/doctor/calculadores_en.htm#calc_spl

Random phase: 92.5 dB

[maty]

mocenigo by mail:

Apollon has lowered the price of their amp to 990 EUR + (Austrian) VAT, so it is:

* 990 EUR for non-EU customers

* 1,188 EUR for EU customers

I have updated the first post.

[OzarkTom]

mocenigo by mail:

I have updated the first post.

I checked the shipping rate on Appolon Audio's website last week, $68 to Missouri.

Rouge and Nord was around $105.

[gregfisk]

I checked the shipping rate on Appolon Audio's website last week, $68 to Missouri.

Rouge and Nord was around $105.

All of these amps are about the same price, some have slightly nicer cases and they cost a little more. Wiring is slightly different as well but I'm not sure how much difference it really makes.

[gregfisk]

Well, I guess it just depends on what you want to spend your money on. Wires and cases or the actual product that makes the music sound good. Maybe these elements make a difference in sound and maybe they don't. I have as good an eye as anyone and probably better than most. I do design work for people and design things in general. When looks matter to me I happily pay more for whatever it is I'm buying. My Lampi Atlantic isn't the best looking dac I have ever owned for sure, but it sounds better than anything I've heard so far. So, I bought one.

I just ordered a very nice couch and chair for my great room. It really looks good and has very nice leather. I could have easily spent half as much for another leather couch and chair but I like these better. In this case I was willing to spend the extra money to get something I really like and that is well designed rather than something that just looks O.K. to me. It doesn't mean I have good or bad taste.

Everyone has reasons why they spend money on what they do. Just because someone decides they don't think it's necessary to spend money on certain aspects of a product doesn't mean they don't have a good eye or good taste, or that they can't see the difference. To think that is just being narrow minded IMO.

[OzarkTom]

Checking out the Apollon website on the Icepower 1200as amp, these are also custom made after you order. Lead time is currently quoted as a 2 week lead time.

Their 5 star website is very nice, must be a multi-thousand dollar website. They have instant messaging if you have any questions. I ask them about their best sounding amp, the 1200as was not it, but stated it was a best buy for the money. Answer was very speedy.

Face plate options are 4mm rack mount, or 10mm non-rack for the same price. 10mm is just a hair over 3/8 inches, very nice.

Price quoted is $1224 and $105 for shipping. You might message them to check on brokerage fees or other custom upgrades on your amp. Paypal is accepted.

Maybe it was Rouge that had the lower $68 shipping rate. I will check that out.

[maty]

Ferrites (speaker cables) inside class D amp with old IcePower modules. Red and black wires like my tweak with woofer wires in KEF Q100 coaxial speakers.

[IMG] http://uploads.tapatalk-cdn.com/20160515/479ffba2e3c85fa1002ee8def91d6aa3.jpg

[IMG] http://maty.galeon.com/WP-imagenes/kef-q100/KEF-Q100-crossover-styroflex-bypass.jpg

[OzarkTom]

All of these amps are about the same price, some have slightly nicer cases and they cost a little more. Wiring is slightly different as well but I'm not sure how much difference it really makes.

I heard a rumor that the 100as ice edge module might be out. I will wait on that one. Heck, with the speakers I use, 10 watts per channel would blow my ears out. No 1200as for me.

[Audiogeek2]

For someone who doesn't own and has no intention of owning an AS1200 based amp - you sure post a lot about them....

I have no issue using my Mivera Takachi case AS1200 amp with my horns which have a sensitivity of 100db.
If you want real feedback about the AS1200 look at the Mivera feedback threads-  real info from actual owners of the amp, not just conjecture and speculation from guys who don't even want the amp.

[OzarkTom]

For someone who doesn't own and has no intention of owning an AS1200 based amp - you sure post a lot about them....

I have no issue using my Mivera Takachi case AS1200 amp with my horns which have a sensitivity of 100db.
If you want real feedback about the AS1200 look at the Mivera feedback threads-  real info from actual owners of the amp, not just conjecture and speculation from guys who don't even want the amp.

If the ice edge technology is only in the 1200as, then that is probably what I will buy. There are now five companies making the 1200as ice edge, and I am sure there will be a lot more before the year is out. Also, PS audio is getting some great reviews from mags and real owners on their icepower amps. Check out their website. M700's are now rated Class A by Stereophile.

Maty also posted a lot on these companies, has he bought one yet?

[Audiogeek2]

PS Audio make some great gear, I used to have one of their dacs. The M700 looks like a nice amp, but the 700AS is a lower end offering than the 1200AS from Icepower. The 1200AS does not benefit from an input buffer, and can be had for a lot cheaper than the M700. As 1200AS based amp seems more appealing to me.

If you rate the M700 so much are you going to buy a pair?

[OzarkTom]

PS Audio make some great gear, I used to have one of their dacs. The M700 looks like a nice amp, but the 700AS is a lower end offering than the 1200AS from Icepower. The 1200AS does not benefit from an input buffer, and can be had for a lot cheaper than the M700. As 1200AS based amp seems more appealing to me.

If you rate the M700 so much are you going to buy a pair?

Who knows? Just looking at all my options.

I have never heard M700's BTW. All reviews are just reviews until you get to hear the equipment yourself in your system. Everyone here knows that. 1200as reviews are no different.

[Audiogeek2]

Who knows? Just looking at all my options.

I have never heard M700's BTW. All reviews are just reviews until you get to hear the equipment yourself in your system. Everyone here knows that. 1200as reviews are no different.

Everyone needs a starting point of where and what to start listening to when selecting a new piece of gear. Specs, professional reviews, enthusiast feedback can help provide that starting point. The feedback threads here are the most information you will find anywhere about the 1200AS - great for anyone wanting to know the options.

You are a hundred percent correct that you will never know how something sounds unless you listen to it in your own system - ideally over several days.

On the flip side it is equally important to ignore the noise from guys who constantly talk about stuff they have no experience with whatsoever. 

What options are you looking for? What kind of system?
You couldn't lose with one of the Mivera amps if you really wanted to try a 1200AS, they are in so much demand that all the guys that upgraded to SE have sold the Takachi amps in minutes for no loss. That it is cheaper than anything comparable is a credit to Mike.

[mr_bill]

Are the PS Audio M700 amp Ice modules using a different module technology than the 1200 Ice Edge module?

[mresseguie]

If the ice edge technology is only in the 1200as, then that is probably what I will buy. There are now five companies making the 1200as ice edge, and I am sure there will be a lot more before the year is out. Also, PS audio is getting some great reviews from mags and real owners on their icepower amps. Check out their website. M700's are now rated Class A by Stereophile.

Maty also posted a lot on these companies, has he bought one yet?

Hello, Tom.

I just wanted to clarify something you stated in the above quote. You stated, "There are now five companies making the 1200as ice edge, and I am sure there will be a lot more before the year is out."

I believe what you meant by this is that there are five companies using the 1200as modules to produce amplifiers. There is only one company making the 1200as modules, and that is ICEpower.

As for the PS Audio M700 amp that you mentioned, consider this statement:

"In the Stellar M700, the Gain Cell drives a 700ASC class-D power module from the Danish company ICEpower. I asked Paul McGowan, CEO of PS Audio, why they chose this module rather than, say, one from Hypex, another class-D specialist. He said that they spent a lot of time listening to modules from various manufacturers, and the 700ASC was the one whose sound quality most closely matched that of the Gain Cell." This quote is from Robert Duetsch's review of the M700 in Stereophile (January 23, 2018)
Read more at https://www.stereophile.com/content/ps-audio-stellar-m700-monoblock-power-amplifier#7M8TWdQKIr3ZXImP.99

You misstated Robert's review when you stated, "Check out their website. M700's are now rated Class A by Stereophile."

In the final paragraph of his review, Robert stated, "Set up side by side rather than stacked, and sitting on IsoAcoustics Orea Audio Equipment Isolators, the Stellar M700s came ever so close to matching the sound of my high-end reference monoblocks, Theta Digital's Prometheuses—which are ranked Class A in "Recommended Components" and, at $12,000/pair, cost four times as much as the PS Audios. The Stellar M700 is an outstanding bargain."
Read more at https://www.stereophile.com/content/ps-audio-stellar-m700-monoblock-power-amplifier-page-2#T6WiXJvb63rfvORk.99

The Theta Digital's Prometheus amplifiers are rated Class A. He did not declare the M700 amps to be Class A.

If you're going to post information in my circle, please make certain it is factual and without errors first.

Regards,

Michael

[audio.bill]

Regarding Stereophile's rating of the PS Audio Stellar M700 amps, in the April 2018 issue Recommended Components on page 76 they are indeed currently rated in their Class A (Solid State) category.

[mr_bill]

He’s correct:

Class A

PS Audio Stellar M700 monoblock: $2998/pair $$$
The Stellar M700 incorporates the latest version of PS Audio's Gain Cell—described as "a proprietary, fully differential, zero feedback, discrete, class-A MOSFET circuit"—using it to drive a class-D power module from the Danish ICEpower company. The Stellar M700 has both balanced (XLR) and single-ended (RCA) inputs, weighs a mere 13 lbs, and is specified as providing 350W into 8 ohms. RD used a pair of M700s to drive his Monitor Audio Platinum PL300 II loudspeakers, and described the amp as having "very little sound of its own, and nothing that I could describe as a distinct class-D character." The PS amps impressed RD with their distinctly smooth sound—"tubelike wouldn't be entirely inappropriate as a description"—and noted that they were able to drive the Monitor speakers "to volume levels as high as I could tolerate without amplifier or speakers ever sounding distressed." In measuring the Stellar M700, JA noted that it slightly exceeded its rated power output, and concluded that it "offers respectable measured performance." (Vol.41 No.2 WWW)
Read more at https://www.stereophile.com/content/recommended-components-2018-edition-power-amps#HpoG3wOepUJ6fyy3.99


I also understood he meant 5 companies making the amps and not actually making the module. We all know that is only B & O.

[OzarkTom]

^^^^^^