|
|
I am scheduled to get a prototype soon. Could they possibly be "THAT' much better?
You are "really blessed" to get the usually closely guarded prototype to evaluate from a manufacturer without being affiliated to them in any way. If it's been designed to use GaN's Technology to it's "full" capabilities, to fix the two problems with present day Class-D, "switching frequency and dead time" problems, as Technics have done in the SE-R1 (but they do need small heat sinks) with the 1.5mhz switching speed that it's capable of, there is no doubt it will sound far better than the Icepower-1200AS2 modules, as they have those 2 problems that can't be fixed. If not and he cheaps out some and just uses it like the Merrill's or the AGD, GaN based amps did "without" the higher 1.5mhz switching frequency capabilities, it will be still better than the 1200AS2 based Class-D's, but not as good as the Technics SE-R1 |
important to you to be caught up in it, point of reference, we are not. Then why even bother commenting at all. Enjoy your obsession. You got the last 5 letters right, but you misspelled it, it’s passion, subjectively, objectively and technically. |
Not just me sunshine, there quite a few saying/thinking it beside me.
Love George |
tweak1
BTW, I will have a 200w GaN prototype soon. Even if it is amazingly better, it will cost significantly more, and out of range of my budget. Really!! so your the test pilot, looks like the members thoughts were right. And also wrong again, it’s just a couple of transistors that’s the difference, the GaN output transistors are a little more expensive than the Mosfets in what you have now. The rest of the amps build cost "should" be no different than what you have now, unless the maker want to price gouge. |
I hope that something comes along help you snap out of your obsession with trashing class D It will as I’ve said below, and I don’t trash class-D, I give their "Achilles Heels" x 2 problems they have, that GaN will fix if used like Technics with the SE-R1 did. then I will get one. If you can’t understand that, then that’s your problem. https://forum.audiogon.com/posts/1798165 tweak1
I will have a 200w GaN prototype soon. Even if it is amazingly better, it will cost significantly more, and out of range of my budget. (jetter, You lose your audience when whatever you have you oversell.)
This again will make many think, test pilot? And shouldn't cost much more as it just the GaN transistors vs Mosfet, that are little more expensive.
|
Do you actually know how much those low priced modules cost? Do you have any idea what the primary market is for these modules? If you thought subs, speaker arrays, and PA amps, you would be correct.
The same scenario goes for the $10k usd Rowland Research Continuum 2, It's used a tweaked (by Pascal) Chinese Sanway $100 subwoofer module. Cheers George |
You cannot buy the IceEdge modules from anyone. At DIY Audio at Head Case ect, they got a group buy together $700 for stereo. So if you get knocked back for one off purchase, just do that by maybe getting a few here together, the mighty dollar speaks big time, even with the Danes from B&O. |
I don't understand why people are not entitled to there opinions. Get over it, some people just like class d.
Ah yes but it goes the other way too, "some people just don't like the sound of most Class-D's" They are just as entitled to have their say. Cheers George |
arcamguy
If anyone has experience with both the 600M and the M700 A buddy and I thought the BC 600M’s were the best we’ve heard Class-D we were very taken by them, but it was on a benign flat 6ohm impedance load Rahl ribbon 2way speaker, we heard it on something else and it didn’t do near as good. And it’s too expensive here in OZ over $7k a pair My buddy then went OS and got to listen to the Technics SE-R1 "GaN based output Class-D with 1.5mHz switching frequency", he text while listening and said "this technology is the future forget the 600m’s". Cheers George |
One caveat: ordered Rothwell -10db Attenuator because preamp+power amp gain is too high, I can’t go beyond 9 o’clock on volume pot, so attenuator will help in pushing noise floor down and give system room to breathe. "One caveat: ordered Rothwell -10db Attenuator" You "push" both signal and noise down of the source and pre, and "maybe" create an impedance mismatch so your no better off. If you really want to lower the noise floor, get a preamp with less or no gain, then you’ll use most of the signal available from source, pre and power without boosting the noise floor. Cheers George |
Ah!!! yes, that was like arguing with my wife! |
You seem to be mixing things up and I think you’re mixing me up with miveraaudio. No, I was continuing your (ear muff) dig at miveraaudio , get a life. |
Tim Tim!!! See the forest through the trees.
Go back and read then read again. All my comments were in reference to the post above yours by Miriva, **** your worse than my wife.
|
"So wrong! So obvious!"
Just have a lot at his self promoting on other threads and you’ll see what I mean. Just like two other retailers here.
|
yes so I continued the payout.
Cheers George |
Oh dear, sunshine, I’m referring to the post above yours.
(so wrong , so obvious) like two other retailers are doing |
|
Hey, you started the attack, not me. Then this, that I noticed you quickly deleted. You’ve deserved everything I"ve said clarinetmonster2 03-02-2019 8:56pm EST To quote you:The bad being "switching frequency noise".Now put your money where your mouth is and show us that you can hear "switching frequency noise" in a blind test. Pretty cut and dry. |
really! water off a ducks back, if anyone believes in snake oil, voodoo ect such as fuses, mains leads ect ect.
Instead of what all good equipment was built using, EE laws, measurements, bench tests ec ect. I rather not have them as as you say "my fans" it's detrimental to what I believe.
Cheers George
|
I've looked at some of your other posts, and my reply is.
Tedious maybe to those that have no understanding of it's technology.
If you don't have the technical ability to see what the new GaN technology is all about, then it's best if you don't even comment on it, as it shows a large degree of incomprehension.
|
Also, because an amp uses GaN doesn’t necessarily make it better.
But one that does will make it better sounding than the "equal" one that doesn't, if both come from the same manufacture using the same topology, save for the output stage (GaN against Mosfet). Just like: Plasma v LCD v LED v OLED, Iphone 4 v 5 v 6 ect ect Better technology in the parts = better sound in the end for Class-D. Cheers George |
Speaking of directional mains fuses AND THERE IT IS!!! and the bait was very old and smelly. Right on cue, mention one word about SR’s directional AC mains fuses, or HFT’s and the snake oilers sniff it out. |
What if they are not? Like their directional ac mains fuse, there is only one answer to that. |
Im about now to try the Synergistic Research HFT (10 Pieces). You had me reading up till then, lucky it was your last sentence and not your first, if it was I would have ignored the rest of your post, I hope directional ac mains fuses aren't next? Cheers George |
I will pray for you.
Really!! with how your self shilling on these forums. And now your bringing god and love into it now. You are a piece of work. |
You are passing judgement on Guido Really! again!! If you bother to read yet again, which you have a problem with it seems comprehending, clearthink was expressing his opinions only, what he said quote: " I personally find". In no way was he trying to force his "judgement" onto "G" You need to take a "shill break" and get off threads that have nothing to do with what your selling in the near future. |
Just please refrain from passing judgement on people who feel otherwise.... You need to get off your horse, I don’t think for one minute guidocorona that clearthink was passing judgement on to you or anyone at all!! He was giving his own personal thoughts as he stated said "I personally find" read it!!!. As for your prima-donna resume, just because you have been a "self paised" jack of all trades musical, does not mean you were a master at any, or can even hear well either. |
scratcha
ClassD Audio The Class-D Audio (which is USA made and sold) is one to look out for as they say they will have their new models of the GaN technology Class-D amps coming out soon, don’t know if they will have it in kit form as well like their other products. Chers George |
The manufacturer trying to confuse people with the "tube" doesn't pass.
It's not really a tube, just the bottle of one with the GaN module stuffed into it. I think he regrets doing it as he did say,
"Company founder Alberto Guerra admitted that he did it largely for the sake of visual aesthetics. “Otherwise a class-D amp just looks like a box,” he said. The amp uses gallium nitride MOSFET output transistors, which Guerra says switch faster and allow the amp to have a noise floor in the -120 to -130dB range. Power is rated at 200W into 4 ohms."
Cheers George |
Think anti-Jeff Rowland Design Group style yep +1 Tim, the "glitz queens" and it probably sounds as good or better |
Here is a an email back to me from the US company "ClassDAudio" regarding the use of the new GaN Fet technology in any of their completed amps or very well priced Class-D kits they make, that use linear power supplies!! https://classdaudio.com/amplifier-kits.html"Hi George,These will not be available in kits. These amps are complex and expensive to manufacture. We’re hoping to have complete amps ready maybe in about a month. We’re still finishing case design. Tom" Cheers George
|
|
|
|
Looks like GaN is starting to take off. Not only Texas Instruments (Burr Brown) who are into the manufacturer of GaN transistor technology, but it seems Analog devices now also. GaN is already being developed into Class-D audio by a few amp manufacturers now, with great feedback on it's sound, compared to the older technology. Analog Devices getting into the manufacture of the GaN technology also https://www.analog.com/en/applications/technology/gan.htmlCheers George |
George, looks like you made my point. As Steve Colino of GaN (EPC) has said below, there is no need for any heatsink on the GaN transistors if they are used at todays switching speed. Only if you use the option to raise that switching speed to gain the extra sound quality, then there is the need for a heat sink to be mounted to the GaN transistors, as in the Merrill and Technics case. Once again you twist things, "it’s not a good look" if you try to put s**t on this new technology while your trying to release your own Class-D amps. Excerpts from Steve Colino’s email to me. V.P., Strategic Technical Sales EPC (Efficient Power Conversion Corporation)
"EPC9106 GaN FET we were able to get outstanding sound quality in the amplifier without heatsinking.
Our GaN FETs will give an even higher performance difference compared to MOSFETs in both sound quality and efficiency at 1.536 MHz switching speed.
The eGaNAMO2016 is a GaN FET amplifier platform that is capable of delivering a very high performance 200 W into an 8 Ω speaker load (400 W into 4 Ω) [8]. Its 96% system efficiency without requiring a heatsink.
You can take the value in sound quality and eliminating heatsink assembly costs while delivering your customers increased efficiency is a smaller form factor."
https://www.digikey.com/product-detail/en/epc/EPC9106/917-1090-ND/5036827" THERMAL CONSIDERATIONS With this high efficiency, the EPC9106 design allows for the complete removal of any classical or historical heat sink requirement. This elimination of the heat sink also reduces the potential contribution to radiated EMI/EMC emissions. |
|
Heatsinks are required, even for Gan devices switching at lower speeds, regardless of what EPC allegedly said. This is not correct. You can buy your own EPC GaN boards from Digikey, and yes they operate with no heatsink. Because EPC’s Steve Colino said to me, (and I posted up his email), they are at 600khz switching speed, you can increase that to 1 or 1.5mhz as Steve said, but you will have to use a heatsink on them. https://www.digikey.com/products/en?%20WT.z_cid=sp_917_0110_buynow&site=us&lang=en&mpart... |
Heatsinks are required, even for Gan devices switching at lower speeds
If you ran this thing under heavy conditions, it would fail And yes Gan devices have their own heat pad underneath which is sweated to the ground plane of the PCB. But that will be in every case that they are used in, your not going to twist it any other way.!!!! https://ibb.co/jTWd9nxI tend to believe the manufacture of the board, EPC and it’s designer Steve Colino, who stated only heatsinking is required on these GaN devices if the switching frequency is raised. Not by what you say. And from Merrill Audio who use the higher switching speed " Internally the Element 118 Power Amplifier Monoblock PCB boards are manufactured to the highest excellence available and further engineered for sustaining a most stable temperature distribution. Using 8 pounds of pure copper per monoblock, the highly refined heat distribution system maintains a steady temperature environment on the PCB boards, a condition absolutely essential for linear operation." |
Give it up Eric, as I said if you have a problem with what I post, eg: like in the way of links of proof of $100 Class-D modules in $10,000> amps ect, then combat them with opposing links if you can! Not go for the personal attack. |
That's not a personal attack. That's a summary.
In your eyes. |
Again with insults just after celander told everyone to cut out the personal attacks. If I have posted up links that are not correct in what's presented, please counter them with the corrected link/s that prove them wrong, instead of just attacking someone personally. |
Georgehifi has been spewing class D disinformation for years This deserves a retort, just for your information, I was the one who showed and posted all about this new GaN technology with it’s higher switching frequency and better dead time into this forum years ago. "YOU CAN"T HANDLE THE TRUTH"
I agree that the newer and faster GaN transistors may allow class D performance to get even better. Interesting times for audio. Hedging your bets there sunshine with that last statement, spoken like a true owner, seller or manufacture of present day Class-D technology, bet your one of the first to jump ship.
|
|
Already given, the Advance Search is very good within Audiogon forums, for your questions, and they are there.
Cheers George
|
that I completely fail to detect any of the sonic shortcomings that georgehifi claims exist on my amps due to traditional FET transistors, the switching frequency being too low and the filter used to remove this switching frequency being of poor quality. That’s your opinion with your hearing, there are countless others that have the opposite opinion to you. The rest of your bs post is just flaming and has no relevance. |
worldwidewholesales
Yes we are currently testing 2 Class D amps with the GaN technology.
Hi, I'm very interested, which ones are these GaN models you are testing? Where do you post up the test results, graphs? Or is this subjective listening to them? Cheers George |
I am not saying the latest 500K mosfet class D amps are state of the art Good, because they’re not current technology, will not allow them to be, but GaN technology looks like it might. BTW: Nice last paragraph sermon, that should get a few more buying your soon to be released Class-D’s made from Ice modules? http://tweakaudio.com/EVS-2/EVS_1200_amplifier/IMAG001.JPG |
