GaN based SU-R1000 Technics Integrated Class-D, review by TAS
aberyclark @aberyclark Can you post a link to this video?. Also isn’t Ken Micallef anti digital?? https://ibb.co/kXvsMZ3 Can’t understand Stereophile giving it to him to review. Cheers George |
This thread is to do with "GaN based SU-R1000 Technics Integrated Class-D" Why is it your on every post but your own ??????????????????????????????????????????????????????????????????????????????? I never bought AGD into it here, but seeing it was I gave the big problems it has with claimed 32 and 50amp current through those tiny tube pins/sockets. And if you want to turn a blind eye to it then well good for you. Cheers George. |
It’s sad, he’s the biggest offender of what he accuses others of doing. And the lack of comprehension... well that’s a whole other story. I’ll state it once again, because you don’t comprehend! "There is no way on the AGD that those tube pins can possibly take 32A of current let alone 50A!!! If they do, then burnout trouble to both pins and socket connections will happen eventually" Then the socket and tube will have to be changed, and the even bigger trouble is guess what!! the GaN amp module is inside the tube!!!! Big bucks for that service work. For his sake hope it doesn’t happen in the warranty period, for owners hope it does. |
1. You are accusing AGD with blatantly lying as to delivering 32A.Your dreaming, ask any tech, you try putting 32-50Amps!! as quoted through those 6550 leaf contact pin/sockets and see what happens to them over time, even the designer said the tube thing was a bit of a gimmick in an interview. (Yes for the gullible to swallow). Again with switching frequency! Yes, 1.5MHz is higher than 800kHz, not better.You have no idea what the switching noise filter has to get rid of it before it get to your speakers and what it does to the phase integrity of the audio band. This is the phase shift at 600khz https://ibb.co/yPT2bH0, for 800khz the red trace would only move to the right so it’s 70 degree "worst point" at 10k now, will then be at 20k instead with 800khz. So you still have bad phase shift with 800khz in the audio band down to 2k instead of 1k. Still bad news. And bwt why are you here, this is a Technics SU-R1000 thread stop shilling for AGD, your only causing it more hurt. |
Really First off Im going to let you know about an amp company that makes such a stunning GaN amp, that I immediately negotiated the USA Dealer position . It is nothing like any of you have yet heard and I stake my name on it . The AGD Production amps are capable of delivering 32A of current on the $7500 model and 50A on the $18K model. They switch at 800Mhz. They are the only GaN amps where the MOSFET is designed for HiFi ground up. The other amps are using GaN devices optimized for battery chargers.He’s a shill for AGD, there is no way that those tube pins can possibly take 32A of current let alone 50A. He’s talking out of his .. And he has no idea about the GaN transistors themselves that get used in these audio amps whatsoever, as the ones for battery chargers couldn’t take the current or the voltage that the audio ones use, again he just talking out of his . And 800khz switching frequency yes is a "bit" better than 600khz, but no way near as good 1.5mhz that Technics uses in the SE-R1 and I believe from what someone said the SU-R1000 also. . |
That doesn’t surprise me at all, if the Rowland was the $10k Continuum S2. As in that they just used a Pascal "tweaked?" Cheap Chinese Class-D modules made for sub-woofer amps. http://www.theaudiobeat.com/equipment/pics/jeff_rowland_continuum_2_large_inside.jpg https://s25.postimg.cc/g9j21ldv3/20170819_180541.jpg And here is the $100 Chinese Sanway subwoofer amp https://imgbb.com/kBHf1S4 Cheers George |
Ok, so we're going down that path well here we are. And from Absolute Sound, quite the opposite " The new Technics SU-R1000 integrated amplifier is one of the most innovative and best-sounding pieces of electronics I’ve had the opportunity to audition in recent years." And from Stereophile a "Webinar" with the Technics guys. Review yet to come. https://event.webinarjam.com/replay/42/2owr9fm9cl0cg7czrw Cheers George |
The two I trust the most are Stereophile and then TAS. Can’t wait for the Stereophile one as it will come with bench tests which "usually" backup the listening tests if you understand them . Yes we can look at another the minor publication Ibtech reviews gave it 5 out of 5 and loved it also "Beautiful warm soundscape with enormous depth and dynamics Cheers George |
I’m positive there are, but you don’t do it by making amps nonlinear or with selective distortions in them. You do it with equalizers if needed or change whatever is that you don’t like the sound of, usually the speakers or room. (not by changing the linear items for non linear ones that's crazy) Cheers George |
Glad someone around here is stand on solid ground. And many with that negativity, are just doing that so they can shill for their own commercial interests. And yes nothing wrong with the "a straighwire with gain" adage, as it implies no colouration, which is a distortion. George lives on his own deserted island.But you live in the clouds and have no idea about: switching frequency vs low order output filter vs resulting in phase shift down into the audio band. Cheers George |
That’s exactly what I did in the 2nd system with my Hypex NC500 monoblocks (same as BelCanto Reference-600 monoblocks). Two things I did that took them to another level, I now have a massive linear supply and the other was when I also completely bypass the Hypex modules input gain stage, because my MSB Discrete R2R DAC has up 7.5Vpp variable output and can drive each of the NC500 poweramps balanced in stage itself direct. Would you rather have your 1.5MHz and lesser SQYes defiantly the 1.5mhz or more switching speed "and better sound quality" it brings. Because the 70 degrees of phase shift in the upper mids/highs https://ibb.co/2thS6y2 on Class-D’s will then be almost reduced to 0, like good linear amps that have FR’s out to 200khz and because of that they also have almost 0 phase shift in the audio band Cheers George |
audioman58 Great output stage setup for the bases to me the best of linear high bias SS amp/s. Gryphon, Dan Ago, Krell, John Curl etc etc all still go this way, and still to me nothing competes with them when hearing them. But Class-D is going to be the norm that's fact, especially with offshoots of Technics SE-R1 and it’s 1.5mhz switching frequency, but still even these amps can’t drive speakers like Wilson Alexia’s etc. Like what those Gryphon, Dan Ago, Krell, John Curl etc etc linear complimentary bi-polar amps can, and they'll still be around for those that want the very best, with the very best of speakers that are usually very hard to drive. As it not possible "yet" for GaN or any complimentary Mosfets to keep almost doubling their wattage for each halving of impedance from 8ohm to 4ohm to 2ohm like the big Bi-Polar amps above can do. Cheers George |
Perhaps it is for other designers but Alberto knows more about GaN’s than others.Well for those that know it’s not good to put all that wattage, current, signal etc etc through those tiny touch contact tube pins, they will be a problem after a while. Even the designer said the tube thing was a bit of advertising gimmick in an interview. AGD’s Audion first gen is "only" 400kHz and is considered to be an excellent product? Their second gen is up to 800kHz I believe.See even he knows that the higher is better. As the SE-R1’s at 1.5mhz!!! is minimum, to have close to zero phase shift back in the audio band. As this Hypex at 600khz shows has (red trace) https://ibb.co/2thS6y2 with 70 degrees!! phase shift at 10khz! and still 50degrees of of phase at 2khz!!!!! >2mhz in the future will be the best. |
Don’t think I ever said it had 1.5mhz switching speed??, just it’s big bro the SE-R1, I seriously hope it does too. As 1.5mhz switching speed is far better than 600khz, as then there’s no 70 degrees phase shift (https://ibb.co/2thS6y2) then from 1khz to 20khz in the audio band. And I’ve always maintained they (all Class-D’s) have a problem driving speakers like Wilson Alexia into very low impedance’s. Cheers George |
