Mobe1969 Posted September 30, 2020 Share Posted September 30, 2020 Yeah I'm interested in linear PSUs too. Is it possible to have an external one that you run say a Lumagen and oppo off of, or that would defeat the purpose? Link to comment Share on other sites More sharing options...
cwt Posted October 1, 2020 Share Posted October 1, 2020 15 hours ago, Mobe1969 said: Yeah I'm interested in linear PSUs too. Is it possible to have an external one that you run say a Lumagen and oppo off of, or that would defeat the purpose? Good question ; this bloke likes individual ones it seems [and for his oppo203] https://audiobacon.net/2018/06/29/linear-power-supplies-for-audiophiles-getting-closer-to-live/ Link to comment Share on other sites More sharing options...
Mobe1969 Posted October 1, 2020 Share Posted October 1, 2020 1 hour ago, cwt said: Good question ; this bloke likes individual ones it seems [and for his oppo203] https://audiobacon.net/2018/06/29/linear-power-supplies-for-audiophiles-getting-closer-to-live/ Yes, @wooferocau mentioned it on the Oppo thread I believe. I was wondering though rather than piecemeal modding (and voiding warranty) on a lot of devices if you could do it. I guess not for this. The Lumagen has an external PSU doesn't it, so the linear PSU replaces that? It is kind of falling into something I was wanting to do, and that is rationalize all of the DCS power supplies to various av devices, so have an external linear PSU you could feed the Lumagen, and other DC devices. So you may need different voltage outputs etc. I guess for the oppo tchnically you could then mod it to bypass the AC input and cable up to the DC side of it from the external LPSU. DC Power packs in the AV area are a bit of a mess to be honest! Link to comment Share on other sites More sharing options...
TP1 Posted October 1, 2020 Share Posted October 1, 2020 19 hours ago, wooferocau said: @TP1 You run an upgraded PSU to you Lumagen ? Any chance of a couple of pics ? It,s my next addition. .....Thanks.. Will do 1 Link to comment Share on other sites More sharing options...
wooferocau Posted October 1, 2020 Share Posted October 1, 2020 Small glitch involving Kaleidescape ..Jim Peterson and Kris Deering are meeting with them today to discuss the "fix" ...... 1 Link to comment Share on other sites More sharing options...
cwt Posted October 1, 2020 Share Posted October 1, 2020 6 hours ago, Mobe1969 said: Yes, @wooferocau mentioned it on the Oppo thread I believe. I was wondering though rather than piecemeal modding (and voiding warranty) on a lot of devices if you could do it. I guess not for this. The Lumagen has an external PSU doesn't it, so the linear PSU replaces that? It is kind of falling into something I was wanting to do, and that is rationalize all of the DCS power supplies to various av devices, so have an external linear PSU you could feed the Lumagen, and other DC devices. So you may need different voltage outputs etc. I guess for the oppo tchnically you could then mod it to bypass the AC input and cable up to the DC side of it from the external LPSU. DC Power packs in the AV area are a bit of a mess to be honest! Theres maybe a work around with daisychained ultracap 1.2's ? This is the sort of psu upgrade that Ayre would love https://uptoneaudio.com/products/ultracap-lps-1-2 Quote There has never been a power supply like this before! The UltraCap LPS-1.2 will elevate the performance of whatever component you power with it. [The adventurous could even purchase two units and hook their outputs up in series, with each one set to either the same or a different voltage—making possible 10/14/16/17/18/19/24V! ; An even more interesting application would be for a DIY hobbyist to use two units harnessed together and center-tapped to produce a pure and isolated bi-polar (+ & -) supply for audio circuit use.] 1 Link to comment Share on other sites More sharing options...
Mobe1969 Posted October 1, 2020 Share Posted October 1, 2020 (edited) 11 hours ago, cwt said: Theres maybe a work around with daisychained ultracap 1.2's ? This is the sort of psu upgrade that Ayre would love https://uptoneaudio.com/products/ultracap-lps-1-2 Ideally a box like that with multiple outputs of selectable voltage so it has say 6 dc outputs you could choose voltage. And ideally one with a decent torroidal transformer in it like say this https://store.acousticsounds.com/d/138258/Musical_Surroundings-24V_Linear_Charging_Power_Supply-Power_Cords https://uptoneaudio.com/products/js-2-linear-power-supply I'm pretty sure those oppo linear PSUs have multiple voltage outputs to the oppo, so technically you could but one of those and put it in a case and take other outputs, so long as the rating high enough. EDIT: OK after more research, the oppo internals are multi voltage, and amperage wouldn't be enough to power Lumagen also... BUT, there are it seems plenty of multi output linear DC power supplied out there. If they are single torroidal/AC stage ground loops may be an issues if powering audio gear (https://www.mysoundaffairs.com/blogs/articles/75817348-hi-end-audio-dc-power-supply-with-multiple-voltage-outputs-architecture-and-design) but should be fine for non audio. I actually REALLY need a linear PSU for my miniDSP (it does suffer visibly from power supply noise), and when/if I get a Lumagen I'd like one for that. So the Lumagen is 12V 5A center positive, 5.5/2.1mm, the miniDSP is 12V .3A 5.5/2.1mm center positive, so something like this would do the trick: https://www.aliexpress.com/item/1005001480398971.html I guess it depends how much you want to spend / improvement really. I've seen high end ones for just the Lumagen (see FidelityAudio in the UK) OK here is a dual AC 12v 5A https://www.aliexpress.com/item/4001026887809.html?spm=a2g0o.productlist.0.0.c8cf58f8MWxMRj&algo_pvid=edce1a48-3593-41d0-bb1d-f7afdfb76563&algo_expid=edce1a48-3593-41d0-bb1d-f7afdfb76563-2&btsid=0bb0624516015877246881203eabb3&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ Edited October 1, 2020 by Mobe1969 1 Link to comment Share on other sites More sharing options...
TP1 Posted October 2, 2020 Share Posted October 2, 2020 For comparison purposes I used a still frame in a 1080 streaming video on Apple TV. This image is with standard SMPS Next Image was with Linear PSU in place. Differences are more noticeable with video running but essentially colour seems better saturated and rendered with Linear PSU and contrast a touch better too. On the big screen, the green and red looked more realistic. I use the same LPSU to power Lumagen and Zappiti. 1 Link to comment Share on other sites More sharing options...
wooferocau Posted October 2, 2020 Share Posted October 2, 2020 @TP1 i did ask previously...but "Any" chance ( please) of a pic of the PSU you use....thanks... 1 Link to comment Share on other sites More sharing options...
TP1 Posted October 2, 2020 Share Posted October 2, 2020 Modifications to the JS-2 PSU are custom made transformer and choke by Hashimoto Transformer Co in Japan plus upgraded capacitors. These mods were done for audio purposes and I don't know if they make any difference to the picture. From my experience with audio use, the choke and speed of the PSU were the primary reasons that this PSU performed so well. Link to comment Share on other sites More sharing options...
wooferocau Posted October 2, 2020 Share Posted October 2, 2020 14 minutes ago, TP1 said: Modifications to the JS-2 PSU are custom made transformer and choke by Hashimoto Transformer Co in Japan plus upgraded capacitors. These mods were done for audio purposes and I don't know if they make any difference to the picture. From my experience with audio use, the choke and speed of the PSU were the primary reasons that this PSU performed so well. Thankyou......my order will be going in very shortly.... 1 Link to comment Share on other sites More sharing options...
TP1 Posted October 2, 2020 Share Posted October 2, 2020 4 minutes ago, wooferocau said: Thankyou......my order will be going in very shortly.... I don't know if you run any other DC powered gear in your setup, but the linear PSU makes an even bigger difference for the likes of media players like Dune & Zappiti as well as streamers like Roku. It also has the juice to power both devices simultaneously. You will just need to order an extra DC output cable if its needed. Link to comment Share on other sites More sharing options...
Mobe1969 Posted October 2, 2020 Share Posted October 2, 2020 12 minutes ago, TP1 said: I don't know if you run any other DC powered gear in your setup, but the linear PSU makes an even bigger difference for the likes of media players like Dune & Zappiti as well as streamers like Roku. It also has the juice to power both devices simultaneously. You will just need to order an extra DC output cable if its needed. So the Lumagen connector is 5.5/2.1mm center pos? Also note that article I posted. For dual outputs, ideally you should have dual ac transformers from a noise perspective. https://www.mysoundaffairs.com/blogs/articles/75817348-hi-end-audio-dc-power-supply-with-multiple-voltage-outputs-architecture-and-design I have ordered a cheap low power single one for my miniDSP just to see the effect. Something I can easily measure the effect without additional hardware. I will get one for the lumagen and oppo too eventually. Link to comment Share on other sites More sharing options...
cwt Posted October 2, 2020 Share Posted October 2, 2020 19 minutes ago, TP1 said: I don't know if you run any other DC powered gear in your setup, but the linear PSU makes an even bigger difference for the likes of media players like Dune & Zappiti as well as streamers like Roku. It also has the juice to power both devices simultaneously. You will just need to order an extra DC output cable if its needed. Nice info TPI thanks ; makes me happy i bought a zappiti duo rather than the pro as a seperate lpsu has better isolation Link to comment Share on other sites More sharing options...
TP1 Posted October 2, 2020 Share Posted October 2, 2020 (edited) 1 hour ago, Mobe1969 said: So the Lumagen connector is 5.5/2.1mm center pos? Also note that article I posted. For dual outputs, ideally you should have dual ac transformers from a noise perspective. https://www.mysoundaffairs.com/blogs/articles/75817348-hi-end-audio-dc-power-supply-with-multiple-voltage-outputs-architecture-and-design I have ordered a cheap low power single one for my miniDSP just to see the effect. Something I can easily measure the effect without additional hardware. I will get one for the lumagen and oppo too eventually. A group of us spent a couple of years all up in buying, building and testing linear PSUs for audio. There are so many theories on how to do this but the proof is in the actual performance. For digital audio you can hear differences in speed between PSU's - for example whether a drum hits hard or if it sounds rounded off by comparison. That speed seems to translate into overall accuracy as well . You don't often see choke modified linear PSU's for a couple of reasons. Apart from cost and complexity , a lot of choke PSU designs are for vacuum tube amplifiers which are not normally associated with speed. The beauty of John Swenson's design is that he has added the purifying aspects of the choke design without sacrificing speed. But then who knows where it can end? This Taiko music server starts life as an Asus motherboard and is sold for over $40K Edited October 2, 2020 by TP1 typo Link to comment Share on other sites More sharing options...
TP1 Posted October 2, 2020 Share Posted October 2, 2020 2 hours ago, Mobe1969 said: So the Lumagen connector is 5.5/2.1mm center pos I think mine is 2.5mm centre positive plug. Link to comment Share on other sites More sharing options...
Mobe1969 Posted October 2, 2020 Share Posted October 2, 2020 (edited) 52 minutes ago, TP1 said: I think mine is 2.5mm centre positive plug. Argh. Odd given ever single other website I've checked says 2.1mm, I'll wait until my lumagen arrives and check myself. I don't want to preemptively get the wrong one. It'd be lovely 8f the people that make these incredibly expensive devices just went the extra mm and put information like this on their website. I gue# when you only make $thousands$ from each sale, providing useful information is costly... Edited October 2, 2020 by Mobe1969 Link to comment Share on other sites More sharing options...
wooferocau Posted October 2, 2020 Share Posted October 2, 2020 https://uptoneaudio.com/products/js-2-linear-power-supply My JS-2 PSU ordered and reserved.... 1 Link to comment Share on other sites More sharing options...
Administrator Marc Posted October 2, 2020 Administrator Share Posted October 2, 2020 11 hours ago, Mobe1969 said: I gue# when you only make $thousands$ from each sale, providing useful information is costly... Sheesh, tough crowd. What have Lumagen done to offend you so much to make a comment like that? I would not think that the mm pin size of their DC plug would be something that any manufacturer would consider 'useful information' to be included in standard published specifications. I bet one simple email to Lumagen to ask this very specific question would get you a very quick answer though. 1 Link to comment Share on other sites More sharing options...
TP1 Posted October 3, 2020 Share Posted October 3, 2020 14 hours ago, Mobe1969 said: Odd given ever single other website I've checked says 2.1mm, It may well be 2.1mm. I am using a 2.5mm plug which often works with a 2.1mm socket but not vice versa. I'll have to locate my 2.1mm lead and check to be sure.. Link to comment Share on other sites More sharing options...
TP1 Posted October 3, 2020 Share Posted October 3, 2020 Ok. The Lumagen DC socket does in fact have a 2.1 mm centre pin. Apologies for any confusion. The Lumagen plug is in the centre and with a 2.1mm plug on the right and 2.5mm on the left. I have been using the 2.5mm ( because it worked) but the 2.1 mm is a more snug fit. Lumagen's attention to detail in their design extends to the DC plug as well. Notice the extended insulator on the Lumagen plug? This is to prevent short circuits when connecting the plug when the power is live. It is a small detail but I and a couple of others I know of have experienced shorts when live swapping leads . 2 Link to comment Share on other sites More sharing options...
wooferocau Posted October 3, 2020 Share Posted October 3, 2020 Yep , Alex from "Uptone Audio " confirmed.....2.1mm for the Lumagen . Should have my new PSU in approx 3 weeks... 1 Link to comment Share on other sites More sharing options...
Mobe1969 Posted October 3, 2020 Share Posted October 3, 2020 6 hours ago, Marc said: Sheesh, tough crowd. What have Lumagen done to offend you so much to make a comment like that? I would not think that the mm pin size of their DC plug would be something that any manufacturer would consider 'useful information' to be included in standard published specifications. I bet one simple email to Lumagen to ask this very specific question would get you a very quick answer though. "Good thinking, 99" (Get Smart throwback). Got a response. 12VDC 5A with a 5.5 x 2.1mm center positive. 1 Link to comment Share on other sites More sharing options...
wooferocau Posted October 5, 2020 Share Posted October 5, 2020 VERY nearly there .......( RE...New Firmware / Up-scaling Improvements and Sharpening Feature,s ) 1 Link to comment Share on other sites More sharing options...
wooferocau Posted October 5, 2020 Share Posted October 5, 2020 http://www.lumagen.com/testindex.php?module=radiancepro_updates FW 092320 Posted 10520 Added sharpening enhancement feature which can be accessed in menu under Input: In Configs: RES: Enhance (or with right arrow). Has level setting from 0-7 (7 being extreme sharpening) and a sensitivity setting which can be set to High or Norm (the High setting avoids sharpening low level changes). You can also access sharpening with right arrow command if you set the option under Other: I/O Setup: Remote Ctl: R/Left arrows option for this. Several improvements in FPGA have improved pixel precision especially for 1080 being upscaled to 4k. Fix for DTM with some fast scene changes causing distracting color change (problem originally seem in Umbrella Academy with bright clouds in background). Fix for menu command to reset all settings except CMS. Fix for being unable to copy input settings to virtual inputs. Please continue giving us your detailed feedback on issues via email at support@lumagen.com . Update time ~5 minutes @230k from previous firmware. 3 Link to comment Share on other sites More sharing options...
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