Re: [SlimDevices: Touch] Fad hum on the headset out
soundcheck;539466 Wrote: No. It is currently just a short unshielded CAT-5 patch cable because I am sitting quite close to the router. It just hit my mind, that perhaps the WLAN interferes with the headphone cable. As soon as I disconnect LAN, WLAN takes over which might explain that hum gets even worse when I disconnect LAN. But it shouldn't be hum. Hum is usually caused by groundloops. That's good. Shielded is difficult to get right (and unnecessary anyway). Do you have your headphones plugged directly into the Touch? are you using a USB drive connected to the Touch as well? is the hum also present on the RCA analogue outputs? -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... Touch(wired/XP) - 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=77816 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Fad hum on the headset out
soundcheck;539740 Wrote: Hi Phil. I think I figured it out - at least partially. It's the ethernet jack. If I touch the ethernet jack metal frame with my finger, hum is gone (or goes heavily down - I guess it needs to be measured). It becomes even more obvious if you unplug the ethernet cable and touch the frame then. I don't have any other cables, only power cord and earphones, connected to the Touch. I guess there is no other way then returning the device. :( Or I just listen to music with my finger plugged in into that ethernet jack. :) Just kidding. No it's not very funny the whole thing. Do you have any other ideas, what to do with this? Cheers BTW: I just read at Amazon.de , that I am not the only one having problems with the ethernet jack!! The squeezebox guys should have a closer look at that IMO hot topic. If the ethernet jack turns out to be a weak point they should quickly revise the product and the grounding scheme of that jack. The jack should be galvanically isolated from the network. Since the hum changes when connecting the cable there must be problem somewhere. We don't want to have the poluted ethernet ground in the device. That's definitely a problem with your Touch. Mine doesn't do that. I'd return it - talk to Support and see if this is a known fault... -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... Touch(wired/XP) - 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=77816 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Fad hum on the headset out
Yeah, I think you got a bum unit as Phil suggests. I just tried all Touch outs into my AVR, cranked volume 100% on both Touch AVR (nothing playing, obviously), no such hum while tapping Touch's ethernet jack. I do get a consistent hum with Touch's headphone out in this scenario, but I believe that is normal for a headphone jack output to a fully cranked amp volume. Tapping Touch's ethernet has no effect on this hum for me. -- toby10 toby10's Profile: http://forums.slimdevices.com/member.php?userid=12553 View this thread: http://forums.slimdevices.com/showthread.php?t=77816 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Fad hum on the headset out
toby10;539758 Wrote: Yeah, I think you got a bum unit as Phil suggests. I just tried all Touch outs into my AVR, cranked volume 100% on both Touch AVR (nothing playing, obviously), no such hum while tapping Touch's ethernet jack. I do get a consistent hum with Touch's headphone out in this scenario, but I believe that is normal for a headphone jack output to a fully cranked amp volume. Tapping Touch's ethernet has no effect on this hum for me. Here we go. :) You got the same issue. I am talking about the headphone jack. The hum starts at power-on. Unplug the ethernet cable to see if it gets worse. Try to ground your ethernet-jack with the finger and tell us if the hum disappears. Just touch the outer frame. Cheers -- soundcheck soundcheck's Profile: http://forums.slimdevices.com/member.php?userid=34383 View this thread: http://forums.slimdevices.com/showthread.php?t=77816 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Fad hum on the headset out
soundcheck;539761 Wrote: Here we go. :) You got the same issue. I am talking about the headphone jack. The hum starts at power-on. Unplug the ethernet cable to see if it gets worse. Try to ground your ethernet-jack with the finger and tell us if the hum disappears. Just touch the outer frame. Cheers Yes, that's what I did. My Touch is connected via WiFi. Tapping the ethernet jack with my finger has no effect on the hum. No hum at power-on (at normal volume). I'll gladly try other suggestions for you. Maybe wet my finger first? :) -- toby10 toby10's Profile: http://forums.slimdevices.com/member.php?userid=12553 View this thread: http://forums.slimdevices.com/showthread.php?t=77816 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Fad hum on the headset out
toby10;539766 Wrote: Yes, that's what I did. My Touch is connected via WiFi. Tapping the ethernet jack with my finger has no effect on the hum. No hum at power-on (at normal volume). I'll gladly try other suggestions for you. Maybe wet my finger first? :) Cranking up power usually increases the noise floor. Hum shouldn't exist at all on such a high-tech device. And noise is something different then hum. Let see perhaps it is not that easy. Perhaps some others chime in into that discussion. Before monday I can not return the unit anyhow. If it turns out to be a general design, production or quality issue, I'd wait with a new order until Logitech comes out with an official statement on the issue. If I'd get some more people on the list, I'd write an official ticket. -- soundcheck soundcheck's Profile: http://forums.slimdevices.com/member.php?userid=34383 View this thread: http://forums.slimdevices.com/showthread.php?t=77816 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Fad hum on the headset out
Well now it looks like my headphone out cable is bad, causing my original reported hum at 100% volume to be inaccurate. Moving this cable around causes static and the hum to be present then go away. Try moving your headphone input around, actually spinning it in your headphone jack, see if that has any effect. Hum or not, connecting or disconnecting or touching the Touch's ethernet has no effect on my unit. I really think you just have a bum unit (and that I have a bum mini-jack cable). -- toby10 toby10's Profile: http://forums.slimdevices.com/member.php?userid=12553 View this thread: http://forums.slimdevices.com/showthread.php?t=77816 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Fad hum on the headset out
Well now it looks like my headphone out cable is bad, causing my original reported hum at 100% volume to be inaccurate. Moving this cable around causes static and the hum to be present then go away. Try moving your headphone input around, actually spinning it in your headphone jack, see if that has any effect. Hum or not, connecting or disconnecting or touching the Touch's ethernet has no effect on my unit. I really think you just have a bum unit (and that I have a bum mini-jack cable). -- toby10 toby10's Profile: http://forums.slimdevices.com/member.php?userid=12553 View this thread: http://forums.slimdevices.com/showthread.php?t=77816 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Fad hum on the headset out
It could be the headphone mini-jack that is the problem...? I'll do tests later when i've finished my chores... -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... Touch(wired/XP) - 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=77816 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Fad hum on the headset out
soundcheck;539430 Wrote: Hi folks. Just got and connected my Touch. Started it up, configured it and hooked up my headphones. Already at power-up I can hear pretty obvious hum in the background and as soon as I disconnect my ethernet cable it gets even worse. Faulty DOA device? Am I doing something wrong here? What do you think? Cheers are you using SHIELDED cat-6 cable? -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... Touch(wired/XP) - 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=77816 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Fad hum on the headset out
I've noticed on many different devices that this could cause a hum: A modified sine wave source- which usually is from using a poor quality UPS. Make sure you're not plugged in through anything like that- if you're using a UPS, make sure it's true sine or pure sine wave. That can make a big difference. You may also get this effect if you plug into a DC to AC power inverter from a solar-powered system or your car. -- FredFredrickson FredFredrickson's Profile: http://forums.slimdevices.com/member.php?userid=16584 View this thread: http://forums.slimdevices.com/showthread.php?t=77816 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
