thyname Posted July 6, 2019 Share Posted July 6, 2019 Are the two output rails independent? In other words, is the galvanic isolation preserved when using both outputs for two separate devices in JS-2? Thanks Link to comment
Superdad Posted July 8, 2019 Share Posted July 8, 2019 On 7/6/2019 at 6:53 AM, thyname said: Are the two output rails independent? In other words, is the galvanic isolation preserved when using both outputs for two separate devices in JS-2? Thanks The JS-2 design has one R-core trans with a single high-current secondary, a single set of Schottky diodes, and a single large DC inductor/choke--feeding 66,000uF of capacitance--which in turn feeds two separate specially balanced cap>regulator>cap networks. Both of the outputs are "floated"--that is their -VE output "ground" is not common to AC mains ground (as is often the case with other supplies), but indeed they are common to each other and therefore the JS-2 outputs are not galvanically isolated. I hope this information is helpful to you. By the way, I have seen a few other multi-rail linear power supplies which, while having more than one transformer secondary and more than one diode bridge, still had its outputs with -VE ("ground") common to each other--and to AC mains ground (yuck on the latter). I think the earlier HDPLEX units were this way and I think Keces still is. thyname 1 UpTone Audio LLC Link to comment
R1200CL Posted July 8, 2019 Share Posted July 8, 2019 18 minutes ago, Superdad said: therefore the JS-2 outputs are not galvanically isolated. But will that affect anything? Like if you’re using dual LPS-1.2 and a SonicTransporter ? Or just an opticalRendu and a EtherRegen ? Link to comment
jamesg11 Posted July 8, 2019 Share Posted July 8, 2019 Yes, knew this re js-2 & isolation, & hence was aware of potential sonic compromise when I powered the mac mini + ultrarendu from it. I’ll get round to using lps1.2 on the rendu ... but - for my edification! - what is the extent of the downside running both mini & rendu off the js-2? macmini M1>ethernet / elgar iso tran(2.5kVa, .0005pfd)>consonance pw-3 boards>ghent ethernet(et linkway cat8 jssg360)>etherRegen(js-2)>ghent ethernet(et linkway cat8 jssg360) >ultraRendu (clones lpsu>lps1.2)>curious regen link>rme adi-2 dac(js-2)>cawsey cables>naquadria sp2 passive pre> 1.naquadria lucien mkII.5 power>elac fs249be + elac 4pi plus.2> 2.perreaux9000b(mods)>2x naquadria 12” passive subs. Link to comment
Superdad Posted July 8, 2019 Share Posted July 8, 2019 1 hour ago, R1200CL said: But will that affect anything? Like if you’re using dual LPS-1.2 and a SonicTransporter ? Or just an opticalRendu and a EtherRegen ? Well you are not really clear in your above examples. a) How would separate UltraCap LPS-1.2 units be related to a JS-2 powering a SonicTransporter? [1: The -VE of the charging side of an LPS-1.2 is always completely isolated from the output of the UltraCap unit; 2: A JS-2 powering a SonicTransporter is not going to have enough current left over to charge two LPS-1.2s--not that there would even be any benefit to doing so.] b) While some loss of galvanic isolation might occur for an opticalRendu and EtherREGEN with common -VE supply, the EtherREGEN is already highly (actively) isolated, so I doubt any degradation would be heard. 1 hour ago, jamesg11 said: Yes, knew this re js-2 & isolation, & hence was aware of potential sonic compromise when I powered the mac mini + ultrarendu from it. I’ll get round to using lps1.2 on the rendu ... but - for my edification! - what is the extent of the downside running both mini & rendu off the js-2? We have people do this all the time. Works and sounds great. I'll put it this way: There is more upside to be gained from powering an ultraRendu from the ultra-low output impedance / ultra-low noise LPS-1.2 than there is downside of the ultraRendu being powered by the JS-2 due to it having common -VE with the Mac mini. Hope that makes sense. UpTone Audio LLC Link to comment
jamesg11 Posted July 9, 2019 Share Posted July 9, 2019 You are definitely getting more subtle in your articulation of ‘problem’ situations, as the years pass the door. But, I get it. Superdad 1 macmini M1>ethernet / elgar iso tran(2.5kVa, .0005pfd)>consonance pw-3 boards>ghent ethernet(et linkway cat8 jssg360)>etherRegen(js-2)>ghent ethernet(et linkway cat8 jssg360) >ultraRendu (clones lpsu>lps1.2)>curious regen link>rme adi-2 dac(js-2)>cawsey cables>naquadria sp2 passive pre> 1.naquadria lucien mkII.5 power>elac fs249be + elac 4pi plus.2> 2.perreaux9000b(mods)>2x naquadria 12” passive subs. Link to comment
R1200CL Posted July 9, 2019 Share Posted July 9, 2019 6 hours ago, Superdad said: Well you are not really clear in your above examples. My post no 415, previous page may be more clear, but I guess you answer some of it now. Link to comment
musicguy Posted July 27, 2019 Share Posted July 27, 2019 First , A big thank you to Mr Crespi. His upgrades to my mac mini and suggestions have been magical. The improvements in sound have been huge!! 2014 Mac mini -mmk-js-2-isogen-lps 1.2 = huge upgrade in sound!! musicguy Superdad 1 Link to comment
rncasper Posted September 23, 2019 Share Posted September 23, 2019 I'm thinking about purchasing a JS-2 to power both a BROOKLYN DAC+ and a SonicTransporter i5--any thoughts/issues? Thanks. Link to comment
Superdad Posted September 23, 2019 Share Posted September 23, 2019 15 hours ago, rncasper said: I'm thinking about purchasing a JS-2 to power both a BROOKLYN DAC+ and a SonicTransporter i5--any thoughts/issues? Thanks. Piece of cake for the JS-2 to power both simultaneously. Thanks also for your call---and for your JS-2 order! UpTone Audio LLC Link to comment
rncasper Posted September 24, 2019 Share Posted September 24, 2019 My pleasure, and MUCH thanks for the in-depth conversation. Very useful--and can't wait to get my JS-2/see what everyone's saying . . . Superdad 1 Link to comment
nbpf Posted October 6, 2019 Share Posted October 6, 2019 I have just realized that it is about one year since I have bought a JS-2 and I feel it's time to say again thanks to the UpTone Audio team for making available such a great product! During the last year, I have used the JS-2 mainly to power an LPS-1.2 and an Allo DigiOne Signature and it has worked flawlessly. Meanwhile, the JS-2 has become an integral part of our living room. It has taken hold of a shelf below the Naim DAC and the SuperNait 2 and I enjoy its design and build quality every day. Superdad 1 Link to comment
Popular Post JSWBach Posted November 17, 2019 Popular Post Share Posted November 17, 2019 I am a Japanese audiophile. I got JS-2 a week ago. Before describe my impression, let me explain about the digital part of my audio system before introducing JS-2. Basic construction is: Mac mini --> MUTEC MC3+USB --> MYTEK Brookln DAC+ MC3-USB and Brookon DAC+ are synchronized by the clock from a clock generator. Further I am using 10MHz OCXO clock for the clock generator. Between Mac mini and MC3+USB, I used a USB isolator (HUMANDATA USB-029H2-RP). I used a DC power supply for Brookon DAC+, but the result is not so good. So I was looking for a good power supply. The reason that I know UpTone Audio is USPCB A>B Adapter which some Japanese audiophile uses. I was very surprised by the sound when I used this adapter in place of a USB cable. Then I visited the UpTone Audio homepage, and I found JS-2 and MMK, and I visited this forum. I decided to buy JS-2 and MMK. The result is much better than I expected. The sound becomes very much clearer. Now I enjoy the sound by JS-2 and MMK. I appreciate Alex Crespi and the members of this forum. thotdoc, andru26 and Superdad 2 1 Link to comment
Superdad Posted November 17, 2019 Share Posted November 17, 2019 5 hours ago, JSWBach said: I am a Japanese audiophile. I got JS-2 a week ago. .... ....The result is much better than I expected. The sound becomes very much clearer. Now I enjoy the sound by JS-2 and MMK. I appreciate Alex Crespi and the members of this forum. Thank you so very much for joining Audiophile Style just to share your kind words. We hope that you enjoy your JS-2 powering your Mac mini and Brooklyn DAC+ for many years. And even if your system changes in the future you will find use for the JS-2 with other audio components. We do not have as many JS-2s in Japan (maybe about 15 that I know of) as we do in other countries but we hope that word will spread there. And always feel free to ask questions here in this forum or via direct e-mail contact. Bernstein 1 UpTone Audio LLC Link to comment
Krishnan Posted November 27, 2019 Share Posted November 27, 2019 Alex, thank you for all the answers to my inquiries, and the prompt shipment of the JS-2. I am from India, yet the Uptone team made the purchase completely hassle free. I bought the JS-2 to power the SOTM SMS200 and clock. While waiting for the devices, I thought I would try powering my passive pre-amp. (My setup : Musical Fidelity M1CDT+DAC->Tortuga Audio Balanced Passive pre->Schitt Vidar mono blocks->Monitor Audio PL100s). I wish all audio equipments have an external DC option that can be powered by a JS-2. Being new to Linear Power Supply, I was simply blown away to notice how much improvement a good LPS can add to your setup. Though a Passive pre-amp has very minimum circuit path that depend on DC power, JS-2 brought in a significant improvement to the output. Specifically, I could notice a more prominent darker background. The over tonality got refined leading to improved sound stage and imaging. Overall songs sound more "musical" and very refined. Great product from up-tone! Superdad 1 Link to comment
Barton Posted December 10, 2019 Share Posted December 10, 2019 Has anyone with a sensitive system compared JS-2 vs lps-1.2 for powering just an ultrarendu or optical rendu? Thanks in advance. Link to comment
kennyb123 Posted December 10, 2019 Share Posted December 10, 2019 2 hours ago, Barton said: Has anyone with a sensitive system compared JS-2 vs lps-1.2 for powering just an ultrarendu or optical rendu? Thanks in advance. I preferred the LPS-1.2 over the JS-2 for powering my microRendu 1.4 - but in my situation I was using the other rail in my JS-2 to power a Mac mini. I even preferred an LPS-1 over that second rail as I reported here: Barton 1 Digital: Sonore opticalModule > Uptone EtherRegen > Shunyata Sigma Ethernet > Antipodes K30 > Shunyata Omega USB > Gustard X26pro DAC < Mutec REF10 SE120 Amp & Speakers: Spectral DMA-150mk2 > Aerial 10T Foundation: Stillpoints Ultra, Shunyata Denali v1 and Typhon x1 power conditioners, Shunyata Delta v2 and QSA Lanedri Gamma Revelation and Infinity power cords, QSA Lanedri Gamma Revelation XLR interconnect, Shunyata Sigma Ethernet, MIT Matrix HD 60 speaker cables, GIK bass traps, ASC Isothermal tube traps, Stillpoints Aperture panels, Quadraspire SVT rack, PGGB 256 Link to comment
lxgreen Posted December 28, 2019 Share Posted December 28, 2019 What is the difference between the JS-2 and the power supply in the Signature RenduSE? Link to comment
Superdad Posted December 28, 2019 Share Posted December 28, 2019 14 hours ago, lxgreen said: What is the difference between the JS-2 and the power supply in the Signature RenduSE? The JS-2 is a dual-output, choke-filtered, 5~7.6 amp linear power supply with custom R-core transformer—and was designed by John Swenson. The power supply in the Signature RenduSE is a single-rail, low-current supply built into the chassis and dedicated to producing about 7V for the ultra/optical Rendu. It was designed by Sonore associate Barrows Worm and utilizes a custom toroidal transformer and I believe Belleson voltage regulator modules. andru26 1 UpTone Audio LLC Link to comment
Popular Post jcn3 Posted January 23, 2020 Popular Post Share Posted January 23, 2020 My second JS-2 has arrived! I could tell an immediate improvement in detail, texture, and soundstage (primarily depth). Look forward to it actually warming up. andru26 and Superdad 1 1 (1) holo audio red (hqp naa) > chord dave > luxman cl-38uc/mq-88uc > kef reference 1 (2) simaudio moon mind 2 > chord qutest > luxman sq-n150 > monitor audio gold gx100 Link to comment
Rhed6 Posted February 17, 2020 Share Posted February 17, 2020 Can the JS-2 power the Enther REGEN and ISO REGEN? If so, any benefits if any going this route? I do have the ISO with the UC 1.2. Link to comment
Popular Post andru26 Posted February 17, 2020 Popular Post Share Posted February 17, 2020 1 hour ago, Rhed6 said: Can the JS-2 power the Enther REGEN and ISO REGEN? If so, any benefits if any going this route? I do have the ISO with the UC 1.2. From Uptone website: JS-2 has can generate up to 7A of current and each output can be used at 5V, 7V, 9V, or 12V. The EtherRegen has an input range of 7V/1.4A, 9V/1.0A, 12V/0.8A Uptone Audio recommends powering the ISO Regen with the UltraCap LPS-1.2, which has an output of 1.1A. From the above info, it's very clear that JS-2 can easliy power the two devices with its max 7A output. The question you might want to ask is whether using two separate UltraCap LPS-1.2 for powering the devices might yield better results due to the galvanic isolation of the LPS-1.2. Superdad and Rhed6 1 1 Link to comment
jamesg11 Posted February 19, 2020 Share Posted February 19, 2020 ... currently, I’m using the JS-2 to power the lps1.2 ...! As well as RME dac. (& yes, I like a pun). Superdad 1 macmini M1>ethernet / elgar iso tran(2.5kVa, .0005pfd)>consonance pw-3 boards>ghent ethernet(et linkway cat8 jssg360)>etherRegen(js-2)>ghent ethernet(et linkway cat8 jssg360) >ultraRendu (clones lpsu>lps1.2)>curious regen link>rme adi-2 dac(js-2)>cawsey cables>naquadria sp2 passive pre> 1.naquadria lucien mkII.5 power>elac fs249be + elac 4pi plus.2> 2.perreaux9000b(mods)>2x naquadria 12” passive subs. Link to comment
seaharp1 Posted February 21, 2020 Share Posted February 21, 2020 On 2/19/2020 at 12:00 PM, jamesg11 said: As well as RME dac Hi, What is the barrel size for the RME ADI-2? Thanks Link to comment
Superdad Posted February 22, 2020 Share Posted February 22, 2020 7 hours ago, seaharp1 said: What is the barrel size for the RME ADI-2? My records, based on e-mails with JS-2/RME ADI-2 owners, indicated that the DC input jack for that DAC is 5.5mm x 2.1mm. UpTone Audio LLC Link to comment
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