Although the two buttons have both the same on/off symbol beneath, the left button turns the unit on and off, while the right button goes through the inputs. The bluetooth input puts it in pairing mode, and bluetooth connection is fairly secure, with me being able to send a reliable bluetooth signal with no dropouts even from a different room. The operation is super satisfying and while the unit looks spartan, it is fun and easy to use. AIYIMA Audio D03 is a Hifi Amplifier in Class D, priced at 160 USD at the moment of writing today’s review. Given the low price point, it will be compared to other entry-level and super affordable desktop hifi amplifiers, including Arylic A50 (220 USD).

AIYIMA Used D03 - US Warehouse AIYIMA Used D03 - US Warehouse

The overall signature can be described as neutral, clean, and fairly dynamic. Even after making abstraction of its price point, I am having a good experience listening to music using all of my speakers through D03, but the sound from the speakers alone seems to have some bass cutoff / rolloff, even quite high at around 70-80Hz. Unfortunately, it was quite complicated for me to connect my powered amplifier, the Adam Audio T10S, because it has RCA or XLR inputs, and I could not use the single RCA output of D03 easily, since T10S takes in stereo signal. It should be noted that I have absolutely no affiliation with AIYIMA. I’d like to thank AIYIMA for providing the sample for this review. This review reflects my personal experience with the AIYIMA D03 Stereo HIFI Amplifier. Every opinion expressed is mine and I stand by it. The purpose of this review is to help those interested in the AIYIMA D03 Stereo Amplifier find their next music companion. We listened to more songs than those named in this playlist, but those are excellent for identifying a sonic signature. PRaT, Texturization, Detail, Resolution, Dynamics, Impact, and overall tonality are all revealed by those songs. We recommend trying most of the songs from this playlist, especially if you’re searching for new music! There’s a subwoofer output for active subs, with a 2.1 V of power, and the unit has a THD of 0.001%. The recommended speaker impedance is 4-8 OHMs, and it has a power of 150W in 4 OHMs, with a 6% THD+N at maximum. The inputs include an RCA input, a USB input for PC, coaxial, Optical and Bluetooth. The bluetooth input allows for aptX, aptX LL and aptX HD, AIYIMA D03 being the best overall amplifier you can find at this price point as far as inputs and outputs go.

Downloads

I heard a lot of good things about the T9 and it costs less than the others but there are a couple of things that worry me:

AIYIMA D03 HiFi Bluetooth 5.0 Audio Amplifier 2.1 Wireless AIYIMA D03 HiFi Bluetooth 5.0 Audio Amplifier 2.1 Wireless

The said music is clean, has a good width, and a good amount of detail too. It is hard to explain what the resolution is like, but if you heard most IEMs in the 200 USD price range, that’s about as detailed as you can expect D03 to be with most speakers. For a multi room setup, or an entry-level setup with an entry level pair of speakers and an entry-level subwoofer, it will be better than anything I’ve tested and heard to date. And I scoured the markets for something to recommend to you my guys.

Specifications

Aiyima's D03 is an FDA (Full Digital Amplifier) amplifier offering a nice energy reserve as well as a precise and transparent sound reproduction. It is indeed capable of developing no less than 2x120W under 4Ω (THD+N 1%) with a high efficiency, thanks to a TI TAS5624A amplifier chip. It also benefits from a particularly complete connectivity, with USB-B, Optical Toslink, Coaxial, stereo RCA (ADC PCM1808) as inputs, but also a Bluetooth 5.0 reception. Practical, this last one allows to diffuse remotely its music, from a smartphone, while taking advantage of the high resolution Bluetooth codecs aptX and aptX-HD. On the output side, there are of course speaker terminals but also an output for active subwoofer, on RCA connector. Technical characteristics Specifications It doesn't have a SUB output (I'm not planning on adding a sub but it's nice to have the option and the D03/D05 have it). RÉSULTAT après 60H00 de rodage : Ne vous posez plus de questions et écoutez la Musique. Tout y est !