Re: [SlimDevices: Audiophiles] why is increasing the power supply amp rating
chill;509312 Wrote: I've never been able to hear a difference between the stock switcher and a linear supply. My SB2 is built into a box with my home made pre-amp, so I made up a linear supply just because it was easier than adapting the switcher to work off the pre-amp's IEC inlet. When I was testing the home made supply I did a few back-to-back tests, and couldn't tell the difference. But. My network connection to my SB2 is via an 'ethernet-over-the-mains' adapter, which works flawlessly up to insanely high bitrates. I recently added an ipod dock to one of the pre-amp inputs, and that came with a cheap switching PSU. To my surprise I found that the presence of that PSU on the same mains socket as the ethernet adapter resulted in regular dropouts in the internet connection to the SB2. That was proof to me that a messy supply certainly can affect other devices. I'm still not convinced there's any difference in the sound though. In the old days the EU ps 220V was crappier than the ps used by US people, all logitech branded SB3 comes with a better supply, my old supply works but its smells hot even if it works properly... Btw my Meridian gear which can be considered high end is filled with switch mode psu's so the technology is not inherently bad, just the usual audiophile fud/conservatism that always hamper real development of high end audio. How you do things is important. -- Mnyb Main hifi: SB3 (soon to replaced by a Touch :) It is on preorder) Bedroom/Office: Boom Kitchen: Receiver (soon to be replaced by my SB3 and the SBRto be stuffed in a box in the attic ) I use a Controller various ir-remotes and a Eee-PC with squeezeplay to controll this Mnyb's Profile: http://forums.slimdevices.com/member.php?userid=4143 View this thread: http://forums.slimdevices.com/showthread.php?t=74250 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
[SlimDevices: Audiophiles] Transporter or wait for Touch?
I have a Mac Mini running SBS and a library that includes an increasing number of 24 bit 96KHz files (AIFF), mainly from digitizing vinyl but also from Naim downloads. Squeezebox radio in the kitchen for non HiFi but impressive listening. Huge frustrations with all software SB players I have tried to run on the MacMini - currently through a HiFace USB to S/Pdif into a Naim Uniti. No switching of digital interface rate - hi-def files are being downsampled. Will be purchasing a SB Touch (I am on the Logitech notify list) to feed the Uniti through digital output. (The Uniti does play from a UPnP server, but I much prefer the SB functionality). My main system though is a venerable Naim 82/180 with Flatcap 2. I had been planning to wait to try the Touch to see if I should buy a second one for this system, but given the delay I have been looking again at the TP option. As TP is no longer being manufactured, but currently still available, I would welcome comments and views on the comparison with the Touch for audiophile use. -- nonnoroger nonnoroger's Profile: http://forums.slimdevices.com/member.php?userid=35581 View this thread: http://forums.slimdevices.com/showthread.php?t=74471 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter or wait for Touch?
nonnoroger;510175 Wrote: I have a Mac Mini running SBS and a library that includes an increasing number of 24 bit 96KHz files (AIFF), mainly from digitizing vinyl but also from Naim downloads. Squeezebox radio in the kitchen for non HiFi but impressive listening. Huge frustrations with all software SB players I have tried to run on the MacMini - currently through a HiFace USB to S/Pdif into a Naim Uniti. No switching of digital interface rate - hi-def files are being downsampled. Will be purchasing a SB Touch (I am on the Logitech notify list) to feed the Uniti through digital output. (The Uniti does play from a UPnP server, but I much prefer the SB functionality). My main system though is a venerable Naim 82/180 with Flatcap 2. I had been planning to wait to try the Touch to see if I should buy a second one for this system, but given the delay I have been looking again at the TP option. As TP is no longer being manufactured, but currently still available, I would welcome comments and views on the comparison with the Touch for audiophile use. Personally - as you are planning on buying a Touch and using S/pdif to your Naim Uniti anyway - I would also try its analogue outputs into the 82/110. I think you may be impressed. -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... SB Touch Beta (wired) - TACT 2.2X (Linear PSU) + Good Vibrations S/W - MF Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Townsend Supertweeters, Blue Jeans Digital,Kimber Speaker Chord Interconnect cables Kitchen Boom, Outdoors: SB Radio Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=74471 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter or wait for Touch?
Wait for the Touch. Personally, Transporter is a non-starter. Components are already EOL. Only two year warranty, no guarantee on post warranty fixes. Look elsewhere: Touch + Unity or new Naim DAC as you're a Naim man. Dave -- DaveWr DaveWr's Profile: http://forums.slimdevices.com/member.php?userid=9331 View this thread: http://forums.slimdevices.com/showthread.php?t=74471 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter or wait for Touch?
Thanks guys. Just the advice I was hoping for - and yes, a Naim DAC is also on the shopping list. -- nonnoroger nonnoroger's Profile: http://forums.slimdevices.com/member.php?userid=35581 View this thread: http://forums.slimdevices.com/showthread.php?t=74471 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter or wait for Touch?
You see I was nice to you. I bought a Linn DS and use Skweezy. A Touch + DAC does have some advantages though - radio streams in particular. Dave -- DaveWr DaveWr's Profile: http://forums.slimdevices.com/member.php?userid=9331 View this thread: http://forums.slimdevices.com/showthread.php?t=74471 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter or wait for Touch?
It doesn't make sense to me to buy a NAIM DAC and a Touch. The music you want to listen to is on a hard drive - no way should you have to convert that to s/pdif to get it into a DAC when it could/should be streamed direcetly. Linn do it right with the DS, Logitech do it right with the Transporter etc; if you want a Naim solution wait until they develop their own streamer. Plus, don't Naim suggest you'll need a power supply for their (£2k) DAC? Plus a £300 mains lead for each? Plus their own expensive s/pdif leads. What kind of engineering is that!?!?! -- JezA JezA's Profile: http://forums.slimdevices.com/member.php?userid=21219 View this thread: http://forums.slimdevices.com/showthread.php?t=74471 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter or wait for Touch?
JezA;510264 Wrote: It doesn't make sense to me to buy a NAIM DAC and a Touch. The music you want to listen to is on a hard drive - no way should you have to convert that to s/pdif to get it into a DAC when it could/should be streamed direcetly. Linn do it right with the DS, Logitech do it right with the Transporter etc; if you want a Naim solution wait until they develop their own streamer. Plus, don't Naim suggest you'll need a power supply for their (£2k) DAC? Plus a £300 mains lead for each? Plus their own expensive s/pdif leads. What kind of engineering is that!?!?! It is not at all clear that Naim will develop a pure streamer - the Uniti and UnitiQute seem to be the closest. Even if they do, it will not work with SBS. This is an SB forum after all. I would have been happy to have a TP if it was still current - perhaps we should say Logitech did it right with the TP rather than do it right? But what do you mean by stream directly? I would like to stream in the most direct way - in the Mac running SBS, but there is no SB software player currently that is up to the job. And before we start another cycle of responses, I do understand why. If the analog output from the Touch proves good enough I will not need a separate DAC. Which DS would you equate with Naim when you are comparing prices? -- nonnoroger nonnoroger's Profile: http://forums.slimdevices.com/member.php?userid=35581 View this thread: http://forums.slimdevices.com/showthread.php?t=74471 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter: Wordclock in and Processor Loop
I do not _know_ that the Transporter word clock in outputs something. seanadams says it does not (That also means it cannot I presume). I might have been fooled into some audiophile truth that wordclock in is better than no word clock in, also for a DAC. The Meitner and dCS DACs have wordclock in, right? And they are expensive and good, right? But they are not data sources and DACs at the same time. Status: I now have the RME controlling the Behringer's output timing by Wordclock and the Transporter DAC input by the clock signal embedded in the spdif signal. And it works. Case closed. -- Valentino Valentino's Profile: http://forums.slimdevices.com/member.php?userid=15986 View this thread: http://forums.slimdevices.com/showthread.php?t=74426 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter or wait for Touch?
See here: http://www.petertyson.co.uk/ebuttonz/linn/digitalstreamplayers/index.shtml The is pre-haggle obviously. Dave -- DaveWr DaveWr's Profile: http://forums.slimdevices.com/member.php?userid=9331 View this thread: http://forums.slimdevices.com/showthread.php?t=74471 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter: Wordclock in and Processor Loop
bhaagensen;510237 Wrote: Hi, Valentino: How do you know that 'Wordclock IN' actually outputs something, rather than e.g. simply doing nothing? Maybe you wrote it, but I couldn't find an exact reason. That was my initial reaction since the Behringer's happy lights went all unhappy and the whole system stopped playing when i tried activating Wordclock In while in asynchronous mode. Let me add that the reason for using the Behringer is because of web radio which seems to favour 48kHz. I must have web radio. My hirez-files are not that many, and I've made 44.1kHz SRC-copies of them already. On the fly sample rate conversion in Squeezeboxserver would be nice of course, but AFAIK the server only allows for conversion to 1/2 or 1/4 Fs depending on Squeezebox model. -- Valentino Valentino's Profile: http://forums.slimdevices.com/member.php?userid=15986 View this thread: http://forums.slimdevices.com/showthread.php?t=74426 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter and word clock base-rate multiplying support
I, too, run the TP slaved to a word clock, in my case it is slaved to the clock output of an EMM dac. The clock does 44.1kHz and 48kHz, but not multiples of these frequencies. So, I wonder, has anyone found a solution to the problem posed by Elberoth in the original post? Some kind of clock-frequency multiplier? -- captain cripes captain cripes's Profile: http://forums.slimdevices.com/member.php?userid=17975 View this thread: http://forums.slimdevices.com/showthread.php?t=73025 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter: Wordclock in and Processor Loop
Valentino;510286 Wrote: That was my initial reaction since the Behringer's happy lights went all unhappy and the whole system stopped playing when i tried activating Wordclock In while in asynchronous mode. Let me add that the reason for using the Behringer is because of web radio which seems to favour 48kHz. I must have web radio. My hirez-files are not that many, and I've made 44.1kHz SRC-copies of them already. On the fly sample rate conversion in Squeezeboxserver would be nice of course, but AFAIK the server only allows for conversion to 1/2 or 1/4 Fs depending on Squeezebox model. Assuming you are running on a PC, you can remove the Behringer completely and force SOX on the Server to resample EVERYTHING going to the TP to 44.1 or 48 or 88.2 or 96 - regardless of its original sample rate. By the way, you are not going to get a low-jitter solution using two DAC's running at the same time in parallel, one for the tweeters and one for the woofers... unless they are the SAME DAC they won't get close to each other in terms of sample timing and all sorts of odd things will be happening to the sound. You shouldn't have more than one clock master... and ONE DAC has to provide that. -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... SB Touch Beta (wired) - TACT 2.2X (Linear PSU) + Good Vibrations S/W - MF Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Townsend Supertweeters, Blue Jeans Digital,Kimber Speaker Chord Interconnect cables Kitchen Boom, Outdoors: SB Radio Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=74426 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter or wait for Touch?
JezA;510264 Wrote: It doesn't make sense to me to buy a NAIM DAC and a Touch. The music you want to listen to is on a hard drive - no way should you have to convert that to s/pdif to get it into a DAC when it could/should be streamed direcetly. Linn do it right with the DS, Logitech do it right with the Transporter etc; Could you quantify what do it right means apart from the obvious avoid s/pdif which indeed can simply things, but does not in itself rule out the possibility of doing it equally well by other means. Plus, don't Naim suggest you'll need a power supply for their (£2k) DAC? Like any other hi-fi company Naim always suggests going further up the hardware hierarchy for better sound. The DAC works fine on the internal supply. Plus a £300 mains lead for each? See my previous answer, including the part saying that the DAC is provided with a power cable, so again this is a upgrade rather than necessity. Plus their own expensive s/pdif leads. What kind of engineering is that!?!?! See my previous answers. Their Naim DAC removes all jitter, but the process depends heavily on the quality of the S/PDIF signal, so it is understandable that they would want the cable to meet certain requirement as the DAC could otherwise become rather ordinary in terms of jitter-handling. I don't know why you seem to consider Naim's cabling system so outragous. In fact their recommended and own speaker and signal cables are moderately priced. Basically at the cheapest level compared to e.g. a company such as Chord. A whole bunch of other manufacturers tout cables costing much more. And it is only recommended practise. Several inexpensive alternative offerings are available. In any case. Naim's products are costly and should as such be considered on equal terms with other luxery products. That is to say, it is a very personal matter whether it is worth it or not. Some buy expensive cars, art, houses, or/and travels etc., and some by expensive hi-fi. It is unfair to assume nothing else than that each such individual finds the cost worthwhile. -- bhaagensen bhaagensen's Profile: http://forums.slimdevices.com/member.php?userid=7418 View this thread: http://forums.slimdevices.com/showthread.php?t=74471 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] My Transporter makes strange noises
NewBuyer;509460 Wrote: Do you mean a ground loop through the ethernet cable? Please explain. That is what I was thinking. I didn't know they were transformer isolated, that's good to know. -- johnM johnM's Profile: http://forums.slimdevices.com/member.php?userid=34243 View this thread: http://forums.slimdevices.com/showthread.php?t=73247 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter: Wordclock in and Processor Loop
What level of jitter-induced distortion can one expect? -- Valentino Valentino's Profile: http://forums.slimdevices.com/member.php?userid=15986 View this thread: http://forums.slimdevices.com/showthread.php?t=74426 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Coax vs. BNC connector for Transporter to Processor?
firedog;505959 Wrote: Isn't it true that BNC will is a true 75 ohm cable whereas with S/PDIF it is only close to 75 ohm, giving theoretical advantage to BNC? Not really. While the BNC is clearly a superior connector the standard is 50 ohm and it was originally designed for 50 ohm cables. So you're garden variety BNC connector is 50. There are 75 ohm BNCs, you can tell by looking at them. The 50 ohm connector has plastic surrounding female center pin and plastic lining the inside of the male outer contact. When they are connected there is solid plastic dielectric between the inner and outer conductors. The 75 ohm BNC removes the plastic in an attempt to match impedances. I'm not sure how well the connector actually does this and its kind of a kluge-job. I haven't even checked my Transporter to see which kind of connector they use, hopefully the 75 ohm type. Its funny that years ago I remember checking out a very expensive Mark Levinson DAC with BNCs that were the 50 ohm type. -- johnM johnM's Profile: http://forums.slimdevices.com/member.php?userid=34243 View this thread: http://forums.slimdevices.com/showthread.php?t=73093 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
[SlimDevices: Audiophiles] Another source for FLAC Music download
Hi, Just read about this danish music label (http://www.dacapo-records.dk/) which sells it's musicdownloads as FLAC 16bit but also (some of them)as Studio Master 24 bit 44.1 or 88.2 KHz. It's mostly Classical. Cheers -- Letten Duet - Audioengine A5 Classic - Sony surround reciever - Jamo 5.1 Speakers / JBL 120Ti 2 Boom's SC 7.4.1 on Laptop running Windows XP Linksys WRT54G wireless router Letten's Profile: http://forums.slimdevices.com/member.php?userid=16718 View this thread: http://forums.slimdevices.com/showthread.php?t=74503 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Coax vs. BNC connector for Transporter to Processor?
True, most BNCs are 50 ohm. Type N, which is a BNC on steroids, has a smaller pin for the 75 ohm version. You will destroy a 75 ohm jack with a 50 ohm plug. But, lucky for us, that does not apply to BNCs. They are mechanically the same, except for less Teflon around the female pin. If anyone is interested, we have some graphs on our site which show what sticking a RCA in place of BNC does. Lots of technically gobbledygook, and obviously for a *non-*Slim Devices product. So, only if someone asks. May not be kosher to give free ad space to someone else's product. At one time, we had a graph showing how much a 50 ohm connector in a 75 ohm system messes things up. It may be lost by now. Surprisingly, there isn't that much of an anomaly when you stick one in. It is much, much less than that of sticking a RCA jack in. Which should not be surprising. The only difference is less Teflon in the connector, for the 75 ohm version. The idea is to reduce the capacitance, which has the effect of raising the impedance. The RCA is a different story. The physical dimensions are all wrong. But... You would think that for as much as those guys charge. Pat -- ar-t http://www.analogresearch-technology.net ar-t's Profile: http://forums.slimdevices.com/member.php?userid=13619 View this thread: http://forums.slimdevices.com/showthread.php?t=73093 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Coax vs. BNC connector for Transporter to Processor?
johnM;510330 Wrote: I haven't even checked my Transporter to see which kind of connector they use, hopefully the 75 ohm type. Yes they are 75#937; -- seanadams seanadams's Profile: http://forums.slimdevices.com/member.php?userid=3 View this thread: http://forums.slimdevices.com/showthread.php?t=73093 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter or wait for Touch?
If you spend hundreds of pounds on a Naim s/pdif lead, is it the zeros that are more 'zero-ey' or the ones that are more 'one-like'? Do you get more 0s with a Naim lead, or more 1s? Do they come in a different order? Did they go to a better school? The Naim DAC purports to buffer and re-clock the data; it doesn't retrieve the clock-signal from the data stream, so surely if the design is any good it should work with any vaguely decent lead, unless of course it is susceptible to other kinds of intereference, such as RF, which would be a pity in such an expensive product. Do it right at the very least means doing it in such a way that s/pdif leads are not part of the solution, for the very reason that, as you tell me, they can affect the sound of a (re-buffering re-clocking) DAC! If you have a cd transport, s/pdif is a pretty much unavoidable necessity. If your data is on a hard-drive s/pdif is completely avoidable, as the Transporter, Squeezebox and Linn DS gear demonstrates. -- JezA JezA's Profile: http://forums.slimdevices.com/member.php?userid=21219 View this thread: http://forums.slimdevices.com/showthread.php?t=74471 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter or wait for Touch?
JezA JezA;510409 Wrote: If you spend hundreds of pounds on a Naim s/pdif lead, is it the zeros that are more 'zero-ey' or the ones that are more 'one-like'? Do you get more 0s with a Naim lead, or more 1s? Do they come in a different order? Did they go to a better school? The Naim DAC purports to buffer and re-clock the data; it doesn't retrieve the clock-signal from the data stream, so surely if the design is any good it should work with any vaguely decent lead, unless of course it is susceptible to other kinds of intereference, such as RF, which would be a pity in such an expensive product. I am not arguing in favour of using 100's £ on digital cables. I'm simply saying two things. a) That this (expensive cables) is how things work in hi-fi everywhere. b) That there is a technical good reason to support the importance of the quality of the s/pdif cable. I am not asserting anything on how a) and b) relates to each other. In fact I tend to agree with your sentiment. JezA;510409 Wrote: Do it right at the very least means doing it in such a way that s/pdif leads are not part of the solution, for the very reason that, as you tell me, they can affect the sound of a (re-buffering re-clocking) DAC! If you have a cd transport, s/pdif is a pretty much unavoidable necessity. If your data is on a hard-drive s/pdif is completely avoidable, as the Transporter, Squeezebox and Linn DS gear demonstrates. Also, it is unclear how the Naim DAC works. If there are 10 close but different clocks which are switched between intermittently to keep the buffer from over or underflowing then that itself is a form of jitter and/or imprecision; but if those 10 clocks belong to different sampling frequencies (ie 32, 44, 48, 96, 192, etc) then the buffer must over or underflow at some point. If the buffer was just kept topped up over the network such issues would not arise - why pick a clock which 'nearly' matches the one in the s/pdif signal when the correct frequency is in the file header!???! Its not unclear to me, but apparently it is to many. I'm in fact presently engaged in a discussion at the Naim forum where I'm trying to explain how the jitter-rejection part of the DAC works*, so although I would like to comment here I provide a link to that discussion as to avoid writing the same twice. There is of course also the whitepaper which says it all. http://forums.naim-audio.com/eve/forums/a/tpc/f/8772903417/m/8602935827 Though as an answer to your final question I can say that one clue is to consider the relationship between jitter and data-rate. The frequncy is not in the file-header of anything received by the DAC. I don't know what a file-header in S/PDIF is. The clock is encoded in the data-stream. The 10 clocks are inteded to (approximately) match, *not* various audio-frequncies such as 44.1, 48, 88, etc, but rather some interval around any fixed one of those, say 44.1. -- bhaagensen bhaagensen's Profile: http://forums.slimdevices.com/member.php?userid=7418 View this thread: http://forums.slimdevices.com/showthread.php?t=74471 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Coax vs. BNC connector for Transporter to Processor?
ar-t;510375 Wrote: True, most BNCs are 50 ohm. Type N, which is a BNC on steroids, has a smaller pin for the 75 ohm version. You will destroy a 75 ohm jack with a 50 ohm plug. But, lucky for us, that does not apply to BNCs. They are mechanically the same, except for less Teflon around the female pin. If anyone is interested, we have some graphs on our site which show what sticking a RCA in place of BNC does. Lots of technically gobbledygook, and obviously for a *non-*Slim Devices product. So, only if someone asks. May not be kosher to give free ad space to someone else's product. At one time, we had a graph showing how much a 50 ohm connector in a 75 ohm system messes things up. It may be lost by now. Surprisingly, there isn't that much of an anomaly when you stick one in. It is much, much less than that of sticking a RCA jack in. Which should not be surprising. The only difference is less Teflon in the connector, for the 75 ohm version. The idea is to reduce the capacitance, which has the effect of raising the impedance. The RCA is a different story. The physical dimensions are all wrong. But... You would think that for as much as those guys charge. Pat Actually, Canare makes a true 75 ohm RCA connector. The assembly is very similar to a BNC and it does a good job of maintaining a constant impedance. A big factor in connector impedance matching is maintaining a coax geometry throughout the connector. This is what the Canare does. -- johnM johnM's Profile: http://forums.slimdevices.com/member.php?userid=34243 View this thread: http://forums.slimdevices.com/showthread.php?t=73093 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Coax vs. BNC connector for Transporter to Processor?
I have heard that crap before, and that is exactly what it is. Yeah, I've heard the excusetake some metal out and, blah, blah That theory falls apart as soon as you mate it to a typical RCA. WBT claims the same nonsense. You can maintain it all that you want. The geometry is just plain wrong. Sorry, the Laws of Physics are not malleable by marketing departments. Pat -- ar-t http://www.analogresearch-technology.net ar-t's Profile: http://forums.slimdevices.com/member.php?userid=13619 View this thread: http://forums.slimdevices.com/showthread.php?t=73093 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] why is increasing the power supply amp rating
iPhone;508106 Wrote: Of course none of this matters with the Squeezebox because there are internal switching supplies inside the Squeezebox after the main power supply. So feeding a Squeezebox with a Linear PS versus a Switching PS makes no difference whatsoever. This has been discussed by Phil and myself on this Forum many times and backed up with the testing we have done. I can measure the noise. Maybe you can't, but it is there. -Especially on the clock chip.- I can show the difference in noise sidebands on the SPDIF output. If I am not mistaken, I may have posted that on this, or other, forums. Whether or not the linear supply has less noise.just because it is linear is no guarantee it is low noise. Most are not. Additionally, the noise from the local regulators -can- override the noise of the external linear. Pat -- ar-t http://www.analogresearch-technology.net ar-t's Profile: http://forums.slimdevices.com/member.php?userid=13619 View this thread: http://forums.slimdevices.com/showthread.php?t=74250 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] With current SPDIF receivers ......
Kellen;506300 Wrote: The WM8804 is driven by a 12MHz oscillator. The incoming S/PDIF signal is locked onto using a digital PLL. This data is then placed into a buffer. The 12MHz oscillator is used to generate a clock, and values are pulled out of the buffer as needed. PLL = Jitter. Plain and simple. TI tried something similar in their RX chips. OK, 'splain to us how 12 MHz is a multiple of 44.1 kHz or 48 kHz? It isn't. Pll. Jitter. Maybe not as much as the next guy, but it is there. Besides, those 12 MHz clocks are so-so when it comes to jitter. A lot of that is the supply. Few people use supplies that are quiet enough. Pat -- ar-t http://www.analogresearch-technology.net ar-t's Profile: http://forums.slimdevices.com/member.php?userid=13619 View this thread: http://forums.slimdevices.com/showthread.php?t=73882 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Transporter: Wordclock in and Processor Loop
Valentino;510322 Wrote:
What level of jitter-induced distortion can one expect?
I haven't been able to understand how to make SOX do fixed 44.1. That
would be nice.
This will resample all flacs to 44100:
flc flc * *
# FT:{START=--skip=%t}U:{END=--until=%v}D:{RESAMPLE=-r %d}
[flac] -dcs $START$ $END$ -- $FILE$ | [sox] -v0.998 -q -t wav - -t flac
-C 0 - rate -v 44100
paste this into custom-convert.conf (replacing the previous flc flc * *
entry), shutdown and restart SBS.
--
Phil Leigh
You want to see the signal path BEFORE it gets onto a CD/vinyl...it
ain't what you'd call minimal...
SB Touch Beta (wired) - TACT 2.2X (Linear PSU) + Good Vibrations S/W -
MF Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x
LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Townsend Supertweeters, Blue
Jeans Digital,Kimber Speaker Chord Interconnect cables
Kitchen Boom, Outdoors: SB Radio
Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85
View this thread: http://forums.slimdevices.com/showthread.php?t=74426
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