AIYIMA D05 Bluetooth 5.0 Power Amplifier 120Wx2 Stereo HiFi 2.1 CH Digital Sound Amplificador 24Bit/192kHz Class D Amp USB DAC Coaxial Optical OLED AptX, Support Subwoofer & with Remote (D05)

The first thing to understand about either of these is that they are dac-amps. When you are using digital inputs the signal stays digital all the way through except for the final output to the speakers. There are just a few amps that work this way but as digital inputs become the most common sources this is truly ideal because you are avoiding both dac adc conversions when using a digital amplifier - and you don't need a high end dac to get good sound. The downside is that the analog input must go through an analog dgital conversion and that is not a strong point of this amp. So as you read others' comments its critical to know what inputs they used. And, of course, bluetooth is not hifi either.I will say that using the digital inputs both of these are truly excellent. I have had many amps including an Aiyama A07, Sabaj A10, Hypex digital, several tube amps, and several class AB amps. In terms of top to bottom detail both the Hypex and D03/D05 are standouts. I did not find the Aiyama A07 as good in soundstage and 'rhythm'. Sabaj high end feels more digital.But don't forget that dac's can make a huge difference. I have some high end dac's including an RME and Marantz DAC1 so I know what a decent dac should do. The precision, imaging, and soundstage you get from D03/D05 are competitive.I highly doubt there's a significant power difference between them despite the specs since they both provided the same power supply (same as the A07 also). They had more power than I could use with the KEF Q100's I was driving. Sound of the two were very similar with the top end feeling a bit more lively with the D05. Both provide an exciting, detailed sound that felt 3d with the instruments suspended in space.I like the aesthetics and creature comforts of the D05 much more, however. Its a bit lower, longer, and narrower with a larger volume knob and more space for the speaker posts on the back. When you change settings the display changes so that you can see what's changed from a distance. There's a loudness contour that's useful at low volumes. And you can blank out the screen if you want. I haven't found any use for the eq settings. Note that a long press on the display button switches to hi gain which is about the same gain as the D03. The D05 is well worth a few extra bucks!Edit 4/18I've played some with the equalizer now and find it helpful. I particularly like the 'country' setting which add just a bit of warmth and reduction in treble. Its really a gentle room curve. Jazz and light rock setting are nicely understated. The heavy rock and rap are just too much bass though. Interestingly, the subwoofer out is unchanged by the equalizer but it is impacted by the tone controls. Unfortunately, if you turn the eq off and then back on it skips to the next eq setting. That's a pain since I really only use the country settingThere are two loudness settings.; 1 is more gentle but hits the upper bass more while 2 impacts low bass more with little effect on upper bass. Loudness, tone control, and eq settings are independent and can all be used at the same time.All these were tested with REW and a calibrated mic - not just my ears.

Perfect for my basic stereo music setup at my desk. I don't need surround theater, etc.Pros:- Clean amplification- Bluetooth works just as hoped- Plenty of power for my system (Polk ES15 speakers + 12" subwoofer)- Remote allows turning power off from a distance, volume up/down, turn off display, plus a few other convenient functionsCons:- Remote cannot advance music track forward or backward by bluetooth. (I really wish it had this feature. It would make the remote far more useful to me.)- No crossover for subwoofer (so main speakers will still get full spectrum of frequencies unless your subwoofer provides its own crossover with a line out to the speakers)Despite these disadvantages, I am quite happy and will probably buy a second one for my bedroom stereo system.

Overall, the Aiyima D05 is an excellent product. Great sound quality and very "non-class D" sounding. The sound is warmer and richer than other class D amplifiers, with plenty of power for most speakers. I'm using the D05 with a pair of Klipsch RB 81II stand mount speakers. The one thing I don't like about the D05 is the "popping/clicking" sounds it makes when you power it up, or switch sources, or (if you're watching TV with audio going through the optical input), every time you change the TV channel, the amp pops/clicks...they are not loud. I don't know if anyone else has experienced this. The popping/clicking could be completely benign, but it does bother me. In comparison, my Topping MX5 class D amp does not pop or click AT ALL...completely silent operation throughout with the MX5. That one bothersome thing aside, the D05 is an excellent sounding amplifier with abundant features and I highly recommend it.

Hard to believe the quality of the sound from my speakers generated by this tiny little dynamo. I am totally impressed and recommend this device highly. Very versatile and super simple with a great little remote as well.

This is an exceptionally poor quality product. The remote is terrible and the switches on the facade are fake. The worst part is that the supplied USB 2.0 cable causes all kinds of loud screeching and static sounds. It's unbelievable to me that a company could cut so many corners that their USB 2.0 cable doesn't work.

This amp sounds pretty good if you compliment it with outstanding gear.The deal breaker for me was the sonic glitches that were sharp, resonant, intermittent and were so impactful that I questioned if they would destroy my Triangle Bro 3 speakers.I returned the amp and my new Iotavx has no signs of spikes or glitches.You pay for what you get.

I purchased the AIYIMA D05 Bluetooth 5.0 Power Amplifier to run a pair of Canton Plus X speakers and a Sony poward subwoofer for near field listening. Amplifier worked very nice. These amplifiers are not really designed to run major systems such as a Definitive Technoklogy surround sound system such as their Mythos series or a pair of Bowers & Wilkens tower speakers. But the AIYIMA D05 Bluetooth 5.0 Power Amplifier works very well in a small space with small but excellent speakers and a powered subwoofer. It's also worth mentioning that the amplifier pairs very easily with most of my bluetooth devices except my P.C.

Good amplifier for the money has many input types. Sounds better than expected I do wish it had a user programmable EQ it dose have 5 or so canned EQs