GaN amplifier from GaN themselves limited supply!!!
For those wanting one, here’s a place (subsidiary of Arrow Electronics) that has 5 of them, and they’re cheaper here too, only $940!!! https://www.richardsonrfpd.com/Products/Product/GS-EVB-AUD-BUND There must be others as GaN has about 50 outlets world wide on the GaN where to buy page, bottom of this page. https://gansystems.com/where-to-buy/ Cheers George |
Looks like there must have been a few purchases done since this thread went up, as they’ve now run out of stock. It says you can still back order though, 10 more units expected on the 28th Oct. https://au.mouser.com/ProductDetail/GaN-Systems/GS-EVB-AUD-BUNDLE1-GS? qs=vHuUswq2%252BszP6hR0ubJmfw%... There are other places they were sent to though, bottom of this page. https://gansystems.com/where-to-buy/ Pics from the video https://ibb.co/wMf0nGS https://ibb.co/wMf0nGS https://ibb.co/r3zjQyR Cheers George |
Here we have the video on the $1300 Gan by Gan Class-D and Power supply, fully loaded with a dac, volume control, switchable inputs two digital and two analog and variable feedback (closed loop/open loop) this is plug and play almost, all you need is a box. https://gansystems.com/webinar-playback-class-d/ 44th minute onward shows you how to use the feedback control in real time while listening to pick the right amout to suit your liking, so listening comparisons can be made. And as I said it also the Scamp connection which also gives many DSP control values to be had via you laptop. There is is the development stage another one from GaN which they call the Reference board which sounds to me like it could be even better? That could take a while though. Cheers George |
@dht4me @dht4me Do you know what the RCA input impedance of this board is, as I've looked and can't find it anywhere, maybe Rick Reigel could let you know if you don't? Cheers George |
The first mentioned history of the new GaN output devices here on Audiogon The new GaN transistors were reported here some 4-5years ago about how they will transform Class-D, especially the way Technics used them with the SE-R1 and it’s 1.5mhz switching speed instead of what everyone else uses around 500-600khz. Here are the first post on Audiogon mentioning the new GaN transistors from "Alex Lidow" of EPC who was the inventor of the Mosfet, or one of them. https://forum.audiogon.com/discussions/class-d-is-just-dandy/post?postid=1413463#1413463 https://forum.audiogon.com/discussions/class-d-is-just-dandy/post?postid=1413469#1413469 https://epc-co.com/epc/Applications/ClassDAudio.aspx And the video he uses and measures the original older GaN by GaN evo board this thread is about the newer model. And dht4me who has been in direct contact with Rick Reigel from GaN, says there is another "Reference Board" in the design stages. This present unit bodes very well for the members here who can do very simple kit assembly themselves, basically mount the GaN board it in a box add some rca sockets and speaker terminals. You got a killer Class-D GaN integrated amp with dac!! and variable feedback for well under $1500 that "could" blow any others here away, as dht4me reported when he demoed it to the LA audio crew and said, "I have built 4 of these to date, the first was for me but as soon al local Las Vegas audiophiles heard it they were begging me to build them one." Cheers George |
This is for others that are interested in this GaN by GaN amp Here is a test/measurement made by Amirm of Audio Science Review, one of the most highly respected sites for the truth on anything audio related. This GaN amp complete was loaned to them by an owner for test/measurement and "it had it’s variable feedback" "set to low" via GaN’s laptop downloadable program because the owner loaned it in to him in that way, trouble is a couple of measurements won’t be as good as they could have been Amrim says that in the tests, and reflects in his conclusion statement. "Performance here is above average compared to median of all amps I have tested (which lands around 78 dB SINAD). But it not stellar. Speaking with the designer, his focus was to keep the level of feedback low to show the advantage of the GaN transistors not needing much. He was not aiming to produce the best performance possible. Personally I wish he had targeted that given that is what we like to see here. As for heat there’s virtually none. " Again, no heatsink due to high efficiency.s for heat sinking it runs so cool there’s no need for it. Practical MOSFETs take time to switch and during that time, they generate losses in the form of heat and limit how fast you can switch them. GaN transistors aim to solve this problem as these few slides from GaN systems show:" Distortion at high power for a Class-D is incredible "We see that the distortion is still under control instead of shooting through the roof.!!" "I don’t think I have ever tested a switching amplifier with this level of frequency independence. Even Class AB linear amps struggle to produce such an absolutely clean response. Amplifiers with high amount of feedback run out of gain at higher frequencies and hence distort more. Not this design." Even techs with follow up comments on the thread were very impressed. https://www.audiosciencereview.com/forum/index.php?threads/gan-systems-amplifier-eval-board-measurem.... As for me getting one, all here know I only have Class-D preference for one, the Technics SE-R1 with it’s 1.5mhz switching frequency, even this GaN by GaN I started here, won’t shift my linear amps, yet!! Cheers George |
For those that are interested, don’t listen to the two detractors that have nothing on their minds but to put rubbish on the USA designed and made GaN by GaN Class-D amplifier for ulterior self motives, it’s obvious and clear. Listen to some one who has made 4 of them (which the above haven’t), and taken them to a audio listen session, and all local Las Vegas audiophiles heard it they were begging him to build them one. dht4me Cheers George |
dht4me There you have it, thanks for posting that up This says it all, the two that are trying their hardest to discredit this GaN by GaN Class-D have only their own interests in mind, and should look after their own interest and stop putting rubbish on things for their own monitory gains. There is another reference board in the design stages as I have been in direct contact with Rick Reigel from GaN.This is great news, can you please keep me (by PM) and others here updated on this? Wow!! that is really saying something as this is no slouch of an amp to be compared to. https://www.fmacoustics.com/products/resolution-series/fm-711-mkiii/ Cheers George |
Yeah, just throw more bandaid fix feedback at it. (just like the zero auto former you push for the OTL’s into hard loads) Everyone know too much feedback is detrimental to the sound, that’s why that GaN by GaN Class-D measured by Amirm had "very little feedback on it" programed from the owner, for the sake good sound, but of not measuring too well in certain parameters. (get with the program) and you and your mate stop putting on everything that’s in opposition to what you’ve got coming, not just on this thread I’ve seen but others too! And btw you can’t cure this kind of -75 degrees! of phase shift (red) with loads of feedback https://ibb.co/S06J7hf only a 4 x higher switching frequency will move that up out of the audio band!!! |
That’s right he has cred with OTL tubes that’s a given. Different altogether doing SS linear or D class, no cred there yet, until his long awaited Class-D comes if ever?? So he shouldn’t put rubbish on this GaN by GaN amp before he gets some, otherwise he’ll be no better than his mate ricevs. Cheers George |
If anyone wants to read the "White Paper" on this $1.3k GaN by GaN stereo amp/dac/pre and power supply complete less case and connectors here it is. Hard to get any hiend audio manufactures to give white papers on their products. https://gansystems.com/class-d/?utm_source=press-release Because you just can’t b*** ***t much with voodoo and snake oil in them. (that leaves the "boutique AC fuse" lot out that’s for a fact) https://au.mouser.com/ProductDetail/GaN-Systems/GS-EVB-AUD-BUNDLE1-GS?qs=vHuUswq2%252BszP6hR0ubJmfw%... Cheers George |
unsound Totally correct Class-D do not like low impedances (yet) that most of the real hiend speakers have. Also the switching frequency still has to be 4 x higher so it’s filter remnants and phase shift are "well out of the audio band" as Technics did with their impossible to get GaN SE-R1 From Absolute sounds reviewand maybe their SR-1000 integrated has also. https://www.lbtechreviews.com/test/hi-fi/technics-su-r1000 Low impedance stability and drive is the reason why I still like linear amps for my main system. I do have Hypex NC500 mono blocks though (with no input buffer and massive linear supplies) for the easier to drive second system though. They do well there, but still have that "segregated" uppermid/highs problem all Class-D’s seem have to me (which I’m sure is the switching frequency/phase shift problem) and where that Technics should shine Cheers George |
Ralph’s knowledge and expertise in this field is a given. I’ve owned his products for over 10 years as well. After reading several posts by Ric of late the kindest word that comes to my mind is: mehCorrect Clio, in the OTL vacuum tube field he’s very knowledgeable. (solid state/D class offerings, different animal altogether yet to see anything there) And the other is at best to me questionable tweaker. You can see it a mile away, both are only here to discredit what could be disadvantageous to what they are doing to soon to come Class-D offerings they have. And you can see it on the other Class-D threads, they do similar to them, also discredit or say they can "make" it sound better with tweaks. Cheers George |
WOW!!!! Didn’t take long, for the two that have the most to loose with their Class-D offering, to start rubbishing this GaN amplifier, as they do in other threads too. But they are so far out, they are in another universe. This is for others that are interested in this GaN by GaN amp Here is a test/measurement made by Amirm of Audio Science Review, one of the most highly respected sites for the truth on anything audio related. This GaN amp complete was loaned to them by an owner for test/measurement and "it had it’s variable feedback set at low" because the owner had it that way, trouble is a couple of measurements won’t be as good as they could have been Amrim says that in the tests. "Performance here is above average compared to median of all amps I have tested (which lands around 78 dB SINAD). But it not stellar. Speaking with the designer, his focus was to keep the level of feedback low to show the advantage of the GaN transistors not needing much. He was not aiming to produce the best performance possible. Personally I wish he had targeted that given that is what we like to see here. As for heat there’s virtually none. " Again, no heatsink due to high efficiency.s for heat sinking it runs so cool there’s no need for it. Practical MOSFETs take time to switch and during that time, they generate losses in the form of heat and limit how fast you can switch them. GaN transistors aim to solve this problem as these few slides from GaN systems show:" Distortion at high power for a Class-D is incredible "We see that the distortion is still under control instead of shooting through the roof.!!" "I don’t think I have ever tested a switching amplifier with this level of frequency independence. Even Class AB linear amps struggle to produce such an absolutely clean response. Amplifiers with high amount of feedback run out of gain at higher frequencies and hence distort more. Not this design." Even techs with follow up comments on the thread were very impressed. https://www.audiosciencereview.com/forum/index.php?threads/gan-systems-amplifier-eval-board-measurem... As for me getting one, all here know I only have Class-D preference for one, the Panasonic SE-R1 with it’s 1.5mhz switching frequency, even this GaN by GaN I started here, won’t shift my liner amps, yet!! Cheers George |
I have absolutely no interest in those boards......even if they were free.Then why are you here trying to derail this thread???🤦♂️🤦♂️🤦♂️ This is the second time this feature packed GaN Evaluation board has really got under your skin. A little strange for this kind of reaction, I believe you’ve just shown your colours. As it seems the way your going on in this way, that it’s detrimental or in direct opposition to what your attempting to do with members here with other Class-D modules, as you can only get one these, and no more, so it’s of no use to you. And for everyone’s else’s information, it’s a USA based Company, and nothing to do with China at all. GaN Systems Corp. 2723 South State Street, Suite 150, Ann Arbor, MI. USA 48104 T +1 248-609-7643. Cheers George |
arch2 They’re not parts Arch, but the complete made up item without box. It’s easy as abc to abc arch, if you can put a system together, you could do this, if you took time look at the data sheet over a few times while doing it, everything would sink in. And don’t forget, if something puzzles you, we all here have access to the data sheet to help out, and you "could" end up with one helluva GaN Class-D Integrated with dac. for $1.3k It’s all here iec AC to the power supply, +- power supply connector to the Class-D board, I drew in the input rca’s and speaker terminals https://ibb.co/bHjMpSs the rest is just mounting screws a box and speaker terminals. Cheers George |
