Lumin upgrade


I’m thinking about upgrading my Lumin U2 mini to the new Lumin U2, and would like your feedback.

My current front end is comprised of the Lumin U2 mini, powered by an SBooster LPS. It’s fed Qobuz via Ethernet from an optical cable coming from a Cisco switch, (converted to copper Ethernet just before the mini, using a cheap converter box with a Jameson LPS wall wart and a short Furutech CAT6 cable).

I’m using an Audioquest Coffee USB cable to feed a Benchmark DAC3 HGC, which runs balanced into a Benchmark AHB2 amplifier. The AHB2 draws current from a separate 20A power line, and uses Kimber cable speaker cables to drive a set of ATC SCM40s.

My listening space is about 16’ wide, with a 35’ length, and has basic treatments at first reflection points, on the ceiling above the listening position, as well as corner bass traps. I listen to pop, mid-later century rock, vocal and combo jazz, and some folky stuff too, usually at moderate (70-75 dB) levels.

My question is, will the upgrade to the Lumin U2 provide a substantial improvement to the sound (soundstage, smoothness, depth, etc), and, is my system resolving enough that I’ll be able to hear it? I do have mild tinnitus in my left ear, with commensurate HF loss, but most days my hearing is still quite reliable.

I was considering an Aurender as my next upgrade, but then saw the new U2 (with excellent price/trade-in for my U2 mini from a local dealer), so thus the questions.

Thanks to all in advance for any advice/opinions.



@jimboman The Isotek syncro uni is usually used for hum, as you mentioned, but it's a kind of a secret that it always improves the sound.

I think it's a big part why I can listen to my stereo during the day now.

@macdude Regarding listening during the day, do you mean, at low levels, things are cleaner/clearer?

I'm coming up on a year of ownership with my Lumin U2.  And I still absolutely love it and to this day, I have no desire to upgrade - and that says a lot. I was your typical, insecure audiophile but finally found a source that gave me loads of security. This Lumin also has something only few other streamers possess. An optical input. For those with fiber optic LANs, it's a no-brainer. 

Hi I have a U2 as well and love it.  If you want to try the fiber optic input you can get a media converter ethernet to optical (Lumin recommends Trendnet).  As long as you are currently hard wired to your U2, you take the ethernet cable that is plugged into your U2 and plug it into the media converter then run a short 2-3 ft run of optical into the U2.  The media converter is around $125 plus you need an optical 2 SPF sleeves and an LC Cable another $75.  It is a great way to go.

There is information on the Lumin website under support (Fibre Networking).  In there example they show a switch that has a SPF slot.  In my example you don't mess with your current switch you just add the media converter to the end of your current Cat 5 run.  If you need a new switch anyway and don't mind running a new cable to your U2 then that would be ok too.

Hope this is not too confusing !