AIYIMA D03 Bluetooth 5.0 Digital Amplifiers 150Wx2 Stereo HiFi 2.0/2.1 CH Desktop Sound Amplificador 24Bit/192kHz Class D Power Amplifier USB DAC Coaxial Optical OLED AptX Support Subwoofer

It offers excellent connectivity options, and the built-in DAC is a fantastic bonus, supporting high-res audio even over Bluetooth. It does get a little warm after continuous use for an hour. Its compact size makes it a perfect fit on my desktop table. I'm using it to drive my old Sony bookshelf speakers along with a T5 active subwoofer. The sound quality is outstanding with good stereo separation and imaging. It's truly value for money.

This is a great little amp which can give entry level integrated amps from Yamaha, Marantz, Denon, etc. a run for their money.I have set this up with ELAC B6.2 bookshelf speakers and feed audio from Fiio M9 over Bluetooth aptx hd.Bass: Full bodied and fast enough. No need to eq it up or down. Great bass I would say. The bass on my Marantz is probably very marginally tighter making it more nuanced, but really small difference - may also be because the Marantz has a flatter sound with lower bass by default. One good thing is that boosting the bass gives better results on this amp than on my Marantz because of the boost frequency and bandwidth.Mids: Marginally recessed compared to the Marantz PM5005 but better than Yamaha which has more of a V shaped signature. Overall ok mids, no issues.Treble: Again no need to eq it. This amp is not at all thin sounding, very neutral I would say.Pros:Comes with a 32V 5A power supply which should be sufficient for home use.Comes with a full function remote.Comes with the PC usb cable and optical cable.Small footprint.Bluetooth works flawlessly in aptx hd. No drops, glitches.Remembers last input mode, volume and bass treble settings.Has 100 step volume control. This is quite important for making subtle volume changes with sensitive speakers. If it had a 30 step volume I would not have bothered buying it.Cons:In bt mode you can do next/prev track but no pause button.Track change responds almost after a second - very slow and may confuse you to multiple key pressing initially.It gets quite warm (just short of hot) after sometime even at volume 50. I had expected it to run cooler. Update: I tested this with a 12V power supply and there was no heating. Sound was still quite loud for in room use with no degradation of sound quality. It also ran well on 12 v lithium battery.Power and Mode button has same icon on the front panel.Overall good price/performance. Poor recordings and old Bollywood songs will sound better on this with a treble cut than on a midrange focused high end amp.Giving 4.5/5 as of now. Recommended.

I was on the lookout for an economical amplifier since niggling issues kept creeping up on my NAD C320BEE. But new amplifiers of similar specs were just too expensive for my budget, and used amplifiers always were questionable with repsect to reliability and authenticity. Thats when I came across the current trend of digital amplifiers, or class D amplifiers. I was sceptical about the quality of these amps but after going through many reviews, I thought it was worth a try. So I ordered this AIYMA without much expectations as to the performance. Hooked it up and was thoroughly disappointed. It sounded thin and lifeless. I thought I may be made a mistake. But I didn't give up. I checked the connections once again and noticed that I had wrongly hooked up the banana speaker connectors, I had mixed up the +& - signs. No wonder it lacked bass! I gave it a second try and this time it was much better. Still, the midrange lacked body. I thought may be the tone settings were incorrect and I was right. The bass was turned down -10 db! Set it to 0 and then it began to sing. Boy was I pleased. The bass had more depth and the midrange had good presence. The highs were clear without being harsh. The music was truly enjoyable. This is a truly value for money proposition. Compared to my NAD, it lacked a bit of warmth, but it is very engaging. I found myself skipping through tracks, eager to know how each track sounds on this amp. And I was never disappointed. I found myself tapping my feet to each track. Now I don't know how hi end systems sound, but I know that this is a clean sounding, powerful amp. The only thing I miss on this amp is a larger display and a better enclosure, because this does look cheap to be honest. In fact, the front fascia had some minor scratches on it. Nonetheless, I would recommend this amp to anyone with a tight budget and space! Absolute value for money!

I was a little skeptical when I first started exploring this product online. However, I am glad that I bought it. It is well built, has a small footprint owing to it being a class D amplifier and the fact that the power-supply is external. Has almost all connectivity options. Most of all the quality of sound is awesome. It does not have an equalizer, but has bass and treble controls. My 3 way speakers sound so good when paired with this. I would highly recommend this to all audiophiles. Make sure you have good quality speakers that can handle the power output and render the base and treble.

I am use micca rb 42 series.sound excellent quality.bass with sound sofestication excellent.

Pros :Value for money amplifier giving wide range of choices for Inputs- USB, Aux, Coa, Opt , BlueTooth...and with 2.1 output (around 150W per channel @ 4Ohm imp speakers).best Audio output in the order of USB,Opt, BlueTooth , Aux (works with Iphone through decent connector)Cons:Lack of HDCP security protocol , prevents connecting Opt port to latest 4K TV and Jio Settop box for accessing sound for Hotstar, Netflix, prime videos.Bluetooth connection not easily recognisable on Laptops, Ipads . Worked with Iphone 11

Didn't think that this little amplifier can compete with big brands like Onkyo or Yamaha. As I have an onkyo avr and Yamaha rn 803 stereo receiver, I can compare this little amp with these big brands.Extremely happy with the quality and clarity of sound. There is no pop-up noise during power on & off.