![]() ![]() ![]() I made a "re-amp" box out of a Jensen transformer in the past, I think a 1:1 transformer will work? I guess I'll try to another tactic of isolating the HD500 from the guitar amp's input with a transformer. It would make it a much more robust product than many of their competitors. I have to admit I've wondered why Line 6 doesn't think about integrating USB isolation directly into the product, since so many people have so much frustration. Very unfortunate, since it would solve so many problems that so many people are having. Presumably the HD line continues this, even though there has not been a need for the increased bandwidth since before the XT line.Īll usb isolator devices on the market, short of some very expensive (like $1,000+) medical devices or whatever, can only do "full speed" - "USB 1 specified data rates of 1.5 Mb/s ( Low-Bandwidth) and 12 Mb/s ( Full-Bandwidth)." So the fact that every single USB isolator product claims "full speed" and either USB 2.0 "compliant" or "compatible, it turns out to be misleading, and "full" is slower than "high." I found some discussion that people who went from XT to X3 found their USB ports were suddenly incompatible. I would love some official confirmation of this, I can't find it documented anywhere. ![]() Evidently it is not capable of falling back/negotiating at older/slower standards. I have no idea why it would need so much bandwidth for changing patch settings, and it certainly needs a tiny fraction of that for audio. I know Line 6 sometimes uses their hardware as licensing dongle so I'm afraid they may deliberately break the functionality of a USB isolator like this somehow? Every other USB device I tried works fine through the isolator.Įvidently, and I can not find any documentation of this, the HD500 will only work with "high speed" USB 2.0 "480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s) (now called "Hi-Speed")". I'm probably going to end up buying other ones to try. I tried every conceivable combination of cables, with/without USB hub before/after the isolator, TWO completely different computers, etc.ĭoes anyone have any insight on if a device like this can possibly work with the HD500? Why would the OS be able to see it, retrieve the plug-n-play info to correctly recognize it as specifically a Line 6 HD500, but refuse to load the driver? When the HD500 is plugged in through the USB isolator - ALL the different noises are gone! BUT - the driver won't load!! It sees that it is an HD500 but will not load the driver. There are several on the market, probably based on the same ADUM3160 or adum4160 chips. However, since every single other device I use has always been perfectly happy the way things are, the obvious solution is use a device to galvanically isolate the USB signal between the HD500 and computer. So if I completely change many things in my system, losing several aspects of functionality, I can actually reduce all the sources of hum and noise coming out of the guitar amp. I had to use a 3 prong to 2 prong adapter on a tube phono preamp (which of course the phono preamp doesn't like), disconnect the FM antenna coax that goes to other recievers in my house (and yes I have a coax isolator that solved a similar problem I had a long time ago, it didn't work in this case), disconnect audio connection from jam room/studio to another reciever in another room, and put my Profire 2626's power cord and a few other things on a power strip on an isolation transformer also with no third prong ground connection. ![]() I've just been through the harrowing experience of finding all the ground loops and other sources of noise when trying to use HD500 with computer and guitar amp simultaneously. ![]()
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