Impedance Matching Question

Nice find, now that looks good I think, seems to be tube input with ss output great combo to get low output impedance and high input impedance.
100k input impedance and 1ohm!!!! output impedance, can be used as a unity gain buffer, or preamp with gain and volume control.

" 8 DIP switches that allow us to select the gain (0dB/6dB) and whether using it as a pre-amp or as a buffer with the help of a flat screwdriver (like the one included)."

https://www.head-fi.org/showcase/ifi-audio-itube.16539/reviews

https://www.audiostream.com/content/ifi-itube-active-tube-bufferpreamplifier

Cheers George

Thanks George for the iTube comments.

astelmaszek - initially I thought the iTube2 at $399 was more than I wanted to spend, however after finding a deal on the iTube for $239 shipping included, I’m thinking that’s just a little more than the Burson cable at $200 and the iTube has more capabilities than a cable. This same authorized dealer is also offering the iTube2 for $279 shipping included, so I ordered one. I’m thinking I’ll just have fun trying it in various places of my systems, and then always have a good way to use any amp with the VTL if I so desire. Thanks for your recommendation of the iTube.

I've had mine for ~2 months and still delighted. Hope you are too, but use good interconnects, not the included ~6" ones.

Also agree about the miracle box thing😀. It serves the music so well..

This maybe interesting for those with impedance matching questions, that I posted on another theard, I'll copy to here as well.

I’ve dealt with impedance matching for many years now, having the product that I have.

With impedance matching if one stays with the 1:10 or higher ratio you’ll have things covered. This goes for source to pre and from pre to amp/s

All you have to worry about then is if the "1" (source or pre) has an output coupling cap, (if they’re dc coupled no problems) and that cap is large enough to maintain that impedance 1:10 ratio flat from 20hz to 20khz you’ll have no problems

If not and it’s too small you may get a change in that ratio in the bass maybe down to 1:2, if this happens because of that coupling cap being too small then you’ll get a "voltage divider" scenario happening in the bass rolling it off too early, maybe at 50 or 100hz and giving a thinner sound with lack of perceived level in the bass.

Cheers George