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Got mine today, Canadian user here. Beware, had to pay 10$ duty fees through Canada Post, get ready to equally pay for the TAXES on it.... On the other hand, just used the device for a little bit. It's as advertised, happy user here :)
I received mine this weekend, and Ispent the last two days listening through it. It feels nice and solid, the sound quality is great, though I haven't used it to drive speakers yet. If I have a complaint, it's about the brightness of the LEDs. The power light was easy enough to correct with a Light Dim, but the power brick has an extremely bright strip, that I eventually turned towards the floor. The light behind the colume knob is also pretty bright as well. I might need to take the front panel off and see what I can do to reduce its brightness. On the whole, it's a great little DAC/amp for $65!
Got mine! Quick question with seasoned users. Using this on my desktop PC, Win 10. When the DAC is powered off, the PC still defaults to send all audio to it, and I have to manually change the default device within windows to switch it back to my regular speakers. I assumed if it was powered off, it would switch pack to the PC soundboard, but doesn't appear to be the case. Do other PC users experience this?
I noticed that if I select one output it'll stick with it. So when I select the Topping, it's the device that gets used next time I boot. I also have an Asus Xonar Essence STX soundcard, and if I select that, it's the default next time I boot. Win 10 makes it really easy to switch between devices though, so that's nice.
Yeah, it's easy enough to switch, was hoping Win 10 or the driver would be smart enough to go in a disabled state when the Topping is powered off.
Will this work with Simple Audio Listen and the HD6XX?
Since those are powered speakers, yes.
As to the Senns, also Yes.
On HD6XX, for most people these will be fine. For anal people (like me), the power output is quite a bit short.
Would this have enough power for my old Technics surround speakers? here is a website with the info. i think it wont, but it shouldn't hurt to ask. I have two that came with a center speaker (was to upgrade a 2.1 to a 5.1 shelf system in the 90s)
the back of the speaker says 8 Ohms 10w music, 40w din
No. This will only work with powered speakers (speakers that have a built-in amplifier of their own), or headphones.
The TP30 will power passive speakers, although given the merger output, you'd want to use high sensitivity speakers.
Lol 140mw into 32 ohms? whats the output impedance of the amp? they dont list the more useful specs... Would advise you do not purchase.
Does this work well with Apple computers?
I agree. It would be nice to know if anyone has hooked this up to their Apple computer. It would be equally useful to know if anyone has hooked up an iPhone, via an OTG cable. The specs only indicate Android compatibility. So, if anyone on here has tried these, please post.
I am running it off of my iMac.
Guess I didn't CLEARLY mention that as my primary source of input in my review you'll find below.
(it's down there, but buried, sort of, I guess.)

Better edit that, SORRY GUYS!

Did do a BRIEF trial off my iPhone... but as iPhones don't need a DAC, and I don't see this as a portable that you'd strap to a mobile device, I didn't really do much with it.
Used a 3.5 pin to RCA's for my interconnect.
I had this unit. When connected as USB DAC there was noise from the speakers which was quite audible. Noise goes away when RCA in was used. So my unit had issues with DAC function. So i returned it
So, I've had the TP30-Mk2 for oh, about 2 months now. Giving it a reasonable run-in time, comparison plays between the multiple sets of headphones that I own, tried several sets of iem's with it as well.
I thought I'd toss out a bit of a review, in case they wake up this drop again.

SOURCE ; iMac playing iTunes via Songbird FLAC and lossless and Apple Lossless.

Headphones used; Beyerdynamic DT770's--T1 Teslas, both v.1 and v2 Did NOT trial the 600 ohm DT880's at all, the T1's were just tried to see if they could be driven at all... they were, but not particularly well. Sennheiser 600, 650,(chosen for their specific sound sig, which I prefer over the "better" Senns), Grados. Almost every version of the Grado. All the way from the PHENOMENAL original RS1.
Massdrop X Fostex THX00 mahogany.
Audeez, Stax, HiFiman, just to see if this thing could push magnaplanars. Not So Much, although there was some noise coming from the HiFimans, just not great, so we'll not mention them again...
IEMs; NuForce Primo 8, MEE Pinnacle P1, Shure 535's, Etymotic,(various), RHA T20, Echobox Finder x1, a couple of the
Sennheiser IEM offerings, and the Beyerdynamic idx160. A couple of Westones.
NOT going to discuss every set of sounds per eargear item here, as it's tedious and not always helpful to other sets of ears than my own, but will give an OVERALL sense of how these appreciate the various sound sigs represented by my fairly eclectic range of eargears chosen. I tend to prefer 'phones that offer a more neutral, flat, "clinical" presentation of the musics, maybe lean more toward mid and high-rangers with a SMOOTH, present, but not heavy or bloomy bass. Much of that is per my music preference for classical music, I guess. One can use equalizers to play with sig, and I like the more accurate representation of what was originally recorded better than phones which colour the music in any one direction.
NOTE- I don't own AKG. I am not a massive fan of the AKG sound, so prefer to spend my cash elsewhere, it's not a political statement in any way.
OTHER NOTE- I did not examine the ability to play speakers, as my speakers are hard to drive and need a high-power amp like a Carver to drive them. The specs imply that the amp could drive passive bookshelf speakers adequately.

Comparison equipment; JDS Labs The Element. Schiit Fulla 2. Schiit Modi 2. A couple of iBassos. Stuck to DAC/amps in the class bracket and that were solid state, as comparing it against tube amps isn't really just, they are 2 very different experiences.
Kind of Music chosen; Lots of classical with much strings, voice, Beethoven through Bernstein and Glass. Lots of electronic music a la Wollo, Boddy, Roach, Serrie, etc. Much Leo Kottke guitar happiness, with some Bluegrass and Appalachian schtuff tossed in. Classical piano. Silk Road Ensemble. Popular and Rock, from Joplin to Foo Fighters to Neil Young to classic Santana, to The Killers to Maroon 5 and so on. Jazz and Blues , Muddy Waters, early Severin, Puente. I don't really do Rap, Dub, or Hip-Hop, although I did run a little Black Eyed Peas and Outkast through it.
My musics were chosen to represent the spectrum and check out what this DAC/Amp offers in the way of clarity, speed, presentation of details and ability to translate input from my iMac running Lossless, FLAC, Songbird et al from iTunes, and several streaming services, as I believe that this is the purpose for which most buyers... buy.

The Meat; The is the summary, the overall take away, the mean/average result of my cross-gear listen; after you read this you could, essentially, skip the more detailed review following and have a good sense of how I appreciated this DAC/amp and whether it's worth buying, especially if on a budget, and how well it turned out in my assessment. More conversational than techie-speak...
I found the Topping TP30 Mk2 to be a very responsive, accurate DAC/amp that offers a pretty crisp, sparkling-yet-smooth presentation of the various musics used in the audition. It's a really NICE entry-level DAC/amp for those just entering the world of higher end audio listening with a nice price-point and looking for an excellent all-arounder as their first/early choice for a DAC/amp. It has great portability, but I found it best used on my desktop for stationary listening as I either work with my photography images or just sit back to LISTEN to the music. Kind of BULKY for strapping to an iPhone and carrying around, it's rather obviously meant for table-top use. It also LOOKS nice, which I personally think is part of the audiophile experience. It's satin-y smooth, tactile, and the interfacing was easy, easy to set up, easy to find the toggles, knob, buttons. The jack-port is the 3.5, which makes it an immediate attractant to IEM's use. I personally would prefer a 1/4 incher, as I am more of a cans fan, and don't really like adding adaptors to my audio stream. It faired well against the JDS Labs and The Schiit equipments, but I appreciated a bit more detail and "presence", a bit more speed, with the others and feel the higher-end qualities represented with the JDS and Schiits, especially returning again and again to The Element as a preferred experience.
The TP30 does a very nice job of presenting detail to many of the electronic musics heard,(which is what I think solid state DAC/amps do very well, as opposed to live and organic), it showcases the tricky and intricate noises and rhythmics that sequencer electronics generate, especially with pieces by Boddy and Serrie. All those little ear-tickling sounds in the background of their music are healthily presented with this DAC/amp, but not quite as forward as I would like. The sound is clean and fairly crisp, does justice to what I am hearing. With acoustic music, one still hears the little squeaky noises of fingers on strings, one still hears the intake of breath when lungs are involved, and I don't feel that anything is dropped by the amp, yet these sounds are a bit better resolved and present with the other DAC/amps compared. Nothing shrill or harsh in the vocals-especially after a 50-hour run-in time .
This is where, if you don't have a better/different device for comparison, you don't feel like you have missed anything in your listening session, it's ALL there. You won't feel like you should have spent more on your DAC/amp, it's a nice little workhorse that can do it all, and quite favourably. A winner at the price, FOR SURE.
OKAY. That's the Summary.

I will occupy a new comment box for the nittygritty side-by-side,more DETAIL comparison/review schtuff.
After my fingers get their feeling back.....
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" case they wake up this drop again." ;)
what do you think about the bass? the bass is much louder than when I plug my earphone on my desktop. I also feel like my desktop gives clearer (but less powerful) sound than this amplifier.