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bhobba

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bhobba last won the day on November 30 2014

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About bhobba

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    Seriously DAC Addicted
  • Birthday 17/11/1955

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  1. Hi All I think Mike is a bit busy right now. He said he wanted to a post about the new speaker he wants to design, but as can be seen he hasn't yet so I will ring him Monday. Thanks Bill
  2. Radiant ebony. Mike made a special stand containing the external crossover on a special spring platform he uses in all his speakers these days. When he rang me to tell me he had completed tuning and burning in, he said he was very impressed with the final result, so impressed he wants to design a speaker using the new SEAS magnesium driver coated with Graphene that helps with the breakup that is very difficult to control in the crossover. It took Mike many tries over a number of years to get it just right. I think Mike can comment on anything else. My speaker will be down at Mike's so anyone can hear it. Anyone got any ideas on when to hold the GTG? Thanks Bill
  3. There are some pictures here: Thanks Bill
  4. Hi All Well, after a long wait, my Magnesium Limited's are now finished. I had a listen to them a while ago now but have not got around to writing it up. Well there is nothing to be said except they are the finest speaker Mike has yet build, and I have ever heard. Its strengths are speed and crystal clear transparency, like a window to the performance. I heard things in familiar recordings I never heard before. A number of people have now heard it and were equally impressed. Needless to say Mike is very happy and has been giving thought to a new speaker based on mine. But he is best to speak about that. Please do go down to Mike's if you can and have a listen. It's a bit different to Mike's usual speakers, being of a more crystalline clarity than organic kind of sound. There will be a GTG to hear it, but no date has been set. Feel free to suggest a date. Thanks Bill
  5. Samsung is actually bringing out two 8k series in 2020. Everyone is talking about the 950TS which many think was the TV of CES. That's their premium model. But they are also bringing out a lower tier model without the gee wiz no boarder, bezel etc that will be a lot cheaper - but as far as picture quality goes not much different. I think they are looking at that replacing their premium 4k models and will be priced competitively to other companies premium 4k models. You will not see much of a difference, except as I mentioned in the larger sizes, but the better up-scaling would likely be visible. To me, and this is of course just a guess, it's just a marketing ploy to differentiate Samsung from the competition. It will look at least as good as 4k models so I would not worry on that count. Thanks Bill
  6. Hi All Samsung has recently released their new 2020 line up unveiled at the CES. They are going into 8k in a big way despite the fact you need screen sizes 75-80 (preferably 80) inches to see a difference at normal viewing distances - the 65 inch 8k model I have - forget it - providing the 4k model has their new AI up-scaling, which Samsung has now put in their 4k. models. I have the Samsung 8k 65 inch and it beats hands down the previous top of the line Samsung 4k it replaced and I simply love it. But that was before they put the new AI upscaling in the 4k models. BTW a note about the now heavily discounted end of year prices before the new 2020 models hit the stores - the difference in price is not that much and may make you say - what the heck - its an expensive TV anyway - so get the 8k anyway - that's the way I now look at it. I need to also add some prefer the upscaling in the Sony or other brands so its important to carefully check them out before forking out the cash. Anyway here is the side by side review with the new up-scaling in the 65 inch 4k: https://www.youtube.com/watch?v=o2scswNMgMY Ok - you need 80 inches - but these large screen sizes are now the fastest growing market for Samsung, so they really need some way of taking advantage of 8k, but, are very concerned about the bandwidth required to transmit 8k content, so have come up with a sneaky, nearly magical way to do it - called AI Scalenet - which had me very intrigued. It can even transmit 4k as standard definition.- which is simply - well amazing. Here are a couple of reviews of the new models: https://www.trustedreviews.com/reviews/samsung-q950ts The exceptional texture and detail work isn’t just notable with native 8K sources, either. Samsung’s 8K AI Upscaling system now features a new Deep Learning element that appears to greatly increase the sense of detail and texture in the most detailed parts of the picture. If you thought 8K TVs were pointless because there’s no native 8K content, Samsung’s latest 8K Upscaling system is good enough – with native 4K sources, anyway – to force you to think again. https://theappliancesreviews.com/samsung-q950ts-8k-review/ AI ScaleNet technology reduces data loss during video streaming. AI ScaleNet compresses the content during transmission from the provider, and then restores it to the TV. Thereby, the new technology halves the bandwidth requirements. According to Samsung, it will continue to actively improve this technology, considering it very promising. In particular, the company has agreed with Amazon Prime Video to jointly test the AI ScaleNet. OK how does it work: https://news.samsung.com/global/developing-ai-scalenet-enabling-seamless-high-resolution-8k-streaming Here is some more detail (see from 27 minutes): https://www.youtube.com/watch?v=g6SWYFEeA64&list=PL7PfK8Mp1rLE89RvwBh2IdCD3h6uAvgGm&index=29&t=1625s I think exactly how they do it is their secret but as they allude to it is based on something like the following: https://cv.snu.ac.kr/research/taid/ Interesting times ahead I think. Thanks Bill
  7. I have an 65 inch 8k television and love it. But that may be because of other factors that SAMSUNG puts in their flagship TV rather than the resolution eg their new AI up-scaling. You will see all sorts of arguments one way or the other if 8k is worth it, but really you need to hear from those organisations that have done the experiments: Also read the following: 8K Live Encoding at IBC 2019 Please read the link and watch the video, but I will summarize the findings, and they are very surprising. First despite what others will tell you, you can see a difference in 8k TV’s compared to 4k. The question is why - and that’s where its surprising. What Harmonic found from 8k and 4k sources into 8k TV’s is 8K looked substantially better. But then they applied (hopefully high quality) down-scaling on the the 8k to make it 4k and compared that to the 4k direct. Surprisingly the down-scaled 8K looked substantially better on the 4k or 8k TV. Now it was very close to the 8K direct into both TV’s. In fact people then found it very difficult to tell the difference between the two on normal size screens of say 65 inchs (the one I have). Conclusion - Harmonic believes we will switch to production in 8K but watch it in 4k - at least initially until screen sizes increase substantially. Just goes to show fact is stranger than fiction. Another interesting finding by another company, ISIZE, is the down-scaling used, by the use of AI, can achieve better quality pictures at substantially lower bit rates: https://www.isize.co/wp-content/uploads/2019/09/IBC2019_iSIZE_v81.pdf They found by transmitting, using AI to lower the resolution to 2/5 or 1/2 the resolution of 4K, depending on the content of each group of frames, then using a simple bi-cubic up-scaler, you can increase the 4K quality for about 60% the bit rate. Of course the source they apply the AI down-scaling to can be 8K instead of 4K. In this way you can greatly reduce the transmission bit-rate of 8K material to values of about 2.5 to 10 mps. But using whats called Adaptive Bit-rate Streaming - also called Dynamic Optimization by Netflix, this would equate to something like 5–6 mbs: Optimized shot-based encodes: Now Streaming! At the moment you need about 20 mbs (sometimes a bit less - say 15 mbs). Because of this I think 8k will be with us quite quickly and not at very high bit-rates so that only those with ultra-fast connections can watch it. Thanks Bill
  8. Having heard the difference the isolation platform makes I agree with Mike. I also have owned the BHK Amp and pre. Very good. But the best I have heard is actually no amp - that's right - no amp. The Chord TT2 is a DAC with an output stage that produces 18W. I heard it through my ML5's which are 89 db sensitive - the ML2's are a bit less sensitive at 86 db so 18w may not work too well with them - but, due to the ears logarithmic response (you need 10 times the power to sound twice as loud - that's the same as 10db - so it will only sound a bit less than the ML5's) its worthwhile checking it out - can save money as well since the amp is gone. Mike has my Chord down at his shop right now - if you can make it down there check it out. I have my Magnesium Limited's being completed soon - but its only 84 db sensitive. Likely will not work well with the Chord - but hey what the heck - will try it anyway. Just on this interesting power thing I have two Arion 500w monoblocks in my system right now when driven by 2v. I have 89db ML3's and use a Direct Stream DAC that produces about 2v at max volume. Each digit on the volume control - it goes to 100 - is .5 db. I find I listen to music at about 40 - 80 would be 10db down - or 50w on peaks - 60 would be another 10db down or 5w on peaks and 40 would be 10db down again - a puny .5w on peaks. It's amazing how little you need. Thanks Bill
  9. I heard them directly driving Mikes ML5's at his store. Mike was skeptical but was shocked how good it was. A direct comparison to the Grandiote was not done but I think it was better. He was impressed enough to really get his finger out with his Seas Exotic speakers that will be 92 db sensitive and an easy drive for the DAC, BTW I think its way cool as well. Amongst other albums I heard was Christmas with Dino. I still cant get it out of my mind. Thanks Bill
  10. Hi All Mike has a Chord TT2 which has the best sound I have yet heard from a DAC (yes I prefer it to the Grandinote). I have heard it on the ML5 - Mike can certainly check it out on the ML2, Its about $7K but it's DAC and amp combined. It may be what you are after - possible issue is HT Thanks Bill
  11. Could be - I can get carried away with tech. But I really like the HD up-sampling. Thanks Bill
  12. BTW that is only too true - and it is maddening because the cost of proper calibration can be a bit pricey. My installer said something like $1K to have it done properly. But another person said Todds Hi Fi did it for $135.00 but I am not sure how good they are. Manufacturers can't do it because the lighting conditions of the room affect the final outcome of what we see. This needs to be taken into consideration when calibrating a TV – so out-of-the-box perfection just isn’t possible. Besides what's in the showroom is simply to make your eyes pop - it's not even close to correct. I use the natural setting on my TV but even that would be vastly improved by proper calibration - its just that damn cost thing. Added Later: Checked with my installer - $700.00 for calibration. Not cheap but I have seen reviews where once calibrated some high end TV looked identical to a moderately priced one. So maybe its really a bargain. I personally will need to think about it. Thanks Bill
  13. IMHO it is, which is why I got it. But opinions vary. While I love Foxtel HD up-sampled to 8K others have posted they thought Sony OLED up-sampled to 4k better. So please, please do not get carried away with the technology - I do that a lot but its not a good idea - go down and check it out for yourself. My friend that checked it out for me did not compare up-sampled HD or check it - it was simply good luck on my part it turned out so good. Of course its the way of the future and prices will drop fast. Nowadays you can hardly buy a HD TV they are nearly all 4k. In a few years it will be the same for 8K. Will we eventually have 16, 32k etc. I have my doubts about that - on my 65 inch TV you can put your face right next to the TV and see no pixels. But then again they say eventually they will have TV's that cover the whole wall - 16k etc may be of some value then. Thanks Bill
  14. Did you read the link I gave - here it is again: http://www.insightmedia.info/8k-tvs-top-tv-line-ups-for-a-reason/ At normal distances (9 feet) 8k is judged 30% better with 60% better depth. Your claim it's not noticeable is based on the Snellen eyechart - but as explained above that is not the whole story. No digital content is transmitted lossless - but hopefully what is missing is not perceptible. With even more modern codecs than Blue Ray (and even with the same coded HEVC) tricks can be done reduceing it to some very low bit rates: If you think you know more than those doing research in it fine - but I tend to believe them. That may make me a fool - I will let others judge. The new up-scaling techniques do add resolution using AI to guess it - how effective it is is for you to judge - I find it makes genuine HD look better than 4K did on my old TV. But that's me - others have posted they do not like it. SD however is not as good. Its entirely up to the consumer if it will succeed in the market. Netflix doesn't reduce perceived quality in its main trick - dynamic optimization (a form of adaptive bit-rate using AI) - but is 30% more efficient and much more tolerant to changes in bandwidth of the internet connection I however love my 8K TV. Just check it out - you may love it to. If you do not then you can save yourself heaps. Thanks Bill
  15. Don't worry - prices will drop quickly just like 4K's. Thanks Bill
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