AIYIMA A07MAX 300Wx2 Class D TPA3255 HiFi Mini Mono/Stereo Amplifier

Having grown up with hi-fi amplifiers being large and heavy, even for modest power outputs, this tiny amplifier is amazing. It is very powerful and sounds very clear with plenty of punch through my Mission speakers. It uses the Class-D principle, which has been theoretically possible for many decades, but very difficult to make a practical working design. Texas Instruments have pioneered Class-D amplifier integrated circuits, and this amplifier unit utilises one of their best chip designs. Although the unit is very small and quite basic - just a volume control on the front - the sound quality and power you get for a such a low cost is incredible.

At this price point I want expecting much and I was very pleasantly surprised. I'm using a Wiim Mini streaming Tidal paired with Wharfdale diamond 9.1 speakers. The sound is accurate and clear. Bass is decent and it can fill a small room. It's a smart uncomplicated little box with solid banana connections for the speakers and a simple on off volume. Love it.

Compact, but gets slightly warm even with delivering circa 100W into 8 ohm. Currently using a 48V PSU, as the 32V is too quiet. I was expecting a louder volume with the amp bridged, but as the supply is on +48V and not +/- 48V, the only advantage bridged is when driving more speakers in parallel. Would recommend trying the amp with a pre-amp, as no clipping even on max volume. For price, size and sound, well worth it. Just a note for others, by going from a 36V supply to a 48V supply you can double the available power as power equals (V*V)/R. Just make sure your 48V supply can deliver at least 7-8 amps, otherwise it will cut out if only rated at 5 Amps as you get close to limit. If driving into 4 Ohm speaker then a 36V 10 amp supply should be fine.

Bought this largely on the strength of the recent Audiosciencereview. I'm driving mine from a pre amp and can control the balance remotely . I believe Amir was less happy with the integrated balance due to the on board pot'. I've not got 'Golden Ears' but to me the sound quality is very good considering the price point. Be aware there's no trigger in remote feature which for some (myself included) might be an issue. Still great value for money, my recommendation.

Lots of positive reviews of the A07Max here and I concur but one feature that I must have is headphone connection. The amp does not have this. I am glad that it is possible to connect a Bluetooth transmitter plugged into the Aux output at the back. Turn down the main Volume knob as this has no effect on the Aux. Actually there is no need to turn the amplifier on at all! Any source (tuner, cd, turntable not needing phono stage, etc) plugged into the amp can be heard through Bluetooth headphone without turning on the amp. Now I am happy (and my good lady too) enjoying the amp using my headphone.

I desperately want to get a second one to bi-amp my small hifi system but can't afford to at the moment, so much has been written about the sonic abilities of this amp but I can confirm everything positive written. I use it as a power amp as volume is controlled via my preamplifier, absolutely faultless can't wait to get my second one real soon hopefully, highly recommended.

Compact and easy to use. Just the stereo input and output with simple speaker outputs and a single volume control. Presently have this connected to a pair of Kef Egg speakers for “quiet” listening and the sound is very good, however, there is no way this amp produces 300 watts. The output is closer to 7.5 watts. As an experiment I have tried this with 3 other pairs of speakers, Monitor Audio, Yamaha and Wharfedale and this amplifier struggled. Either I have a faulty unit or the way the wattage is measured is in error. In my youth I was a singer and used a 100 watt PA system and was often asked to “turn it down a bit”. Back then in the 1970s 100 watts into a pair of 200 watt PA speakers was loud and rarely needed more than half volume. This nebulous modern manner of describing amplifier output is in my opinion dishonest and should be discouraged. What is wrong with stating the actual output in actual watts. Perhaps decades of listening to very loud music has caused very damaged hearing requiring hugely inflated output figures. If this amplifier had been accurately described with regard to its output it would be incredibly useful in my system as all I want is a simple power amplifier that takes sound from my mixer and amplifies it. In other words “Keep It Simple”. Update, 30 Oct 2024: Despite earlier misgivings, I now have 2 of these amplifiers and am about to buy a third one. I have been rearranging and further rearranging my study for some weeks and have made discoveries galore about these little amps. I still don't know how the makers come up with their 300/600watt power output, they did try to explain it to me but it was beyond my understanding, however, my very clever younger electronical engineer graduate brother told me that on this type of amp it has to do with the amount of power you put into it and the resistance of the loudspeakers. So I gave it more power and used lower resistance speakers and wham bam thank you mam, I have the sound I want. No bleurgh-tooth on these which is great because I have never got it to work, ever. Then there is the daisy chain facility, these have a stereo RCA input and a mini stereo jack Aux output...so, I plug an output lead into the RCA input into an second amp, then I can go from the second to a third and so on...each amp will pun a pair of speakers, so three amps give me 6 (3 pairs of) speakers...so I can combine the dynamics of my Wharfedale 10.1, Yamaha and Kef speakers into quite a pleasurable (well, to me it is) sound. The Wharfedales have an amazing bass sound so no subs needed here...I don't like wooly woofy bass, so the hard Kevlar cones on the Wharfedales are spot on for me, with the addition of 'bungs' in these speakers. All controlled via an Omnitronic PM444 usb mixer. It has taken a while to get there and a lot of tweaking plus the addition of good quality cables to get it sounding right and a fair bit of cartridge experimentation as well.

Plenty of power on hand here with the AO7 Max. Very well made Class D. Straight out of the box the amp sounds great, fairly balanced with good vocal presence and will probably .satisfy most people’s expectations.

Qué se puede decir de este Aiyima A07 que no se haya dicho ya en tantos videos que se han publicado? Sonido excelente, precio justo; no se calienta, no mete ruido; viene con una fuente de poder de 36 volts (los modelos parecidos de la misma marca y de la competencia como Fosi Audio y Douk Audio traen la fuente de 32 volts) ¿Eso importa? pues según los datos que publican las tres marcas mencionadas, el cambio de fuente de poder implica un aumento promedio de 25 a 30 whats, y si tomamos en cuenta que la fuente poder de 48 volts que vende Douk Audio por separado cuestas más de 80 dólares; pues el A07 tiene una pequeña ventaja sobre la competencia.

Le Aiyima A07 MAX est le dernier né des amplis à base de puce TPA3255 qui sont dernièrement très à la mode en raison de leur rapport puissance prix très favorable. Le A07 MAX est simple mais bien conçu, il dispose de gros borniers permettant de passer du câble d’enceinte de bon diamètre ou alors encore plus pratique, des fiches bananes. Il ne dispose que d’une entrée RCA simple, il vous faudra donc idéalement ajouter un DAC pour le brancher directement sur votre ordinateur et ainsi bénéficier de ses grandes qualités. L’installation est très simple, il est doté d’un bloc d’alimentation de 36 volts. Il peut également être équipé de blocs plus costauds jusqu’à 48 volts pour une puissance supplémentaire au prix d’un dégagement de chaleur plus élevé. L’ampli est à ce niveau bien conçu car équipé de petits trous permettant une meilleure dissipation de la chaleur. En utilisation et avec l’alimentation de 36 volts, l’amplificateur reste tiède. Il dispose également d’une line-out en mini-jack pour y relier un caisson de grave actif. L’allumage de l’ampli se fait par rotation d’un gros potentiomètre en façade, rien de plus simple. Détail intéressant pour les plus techniciens d’entre nous les op-amps sont remplaçables selon le désir de l’utilisateur, un détail sympathique pour les puristes. En l’état le son qui sort de cet amplificateur est remarquable, avec un rendu des percussions que je n’avais jusque-là jamais entendu sur aucun amplificateur chinois, les impacts sont époustouflants et transfigurent les enregistrements. La puissance développée par l’amplificateur est suffisante pour la plupart des enceintes et impressionnante par rapport à la taille minuscule de l’appareil. Un très bon appareil.

Potenza, dettaglio, profondità. Un campione di qualità/prezzo!!

I am in the process of breaking in. I felt this amp has sufficient juice with the 36v power brick supplied with the amp, however a 48v power supply option would helped customers extract more output from this amp. Out of the box the amp sounds great with the stock op-amps. I will have an op-amp rolling done to test the performance further. One notable inclusion are the speaker Banana Sockets they are strong and audio grade when compared to other amps with in similar price range. The only flaw I could find is the shape. Its more towards the side than going back, this can create some problems if you want to place a DAC on top of the amp unless Aiyima decides to launch a suitable DAC to compliment this amplifier. Over all a good amplifier for those who likes to listen to music with out tone controls. Muse or Sparko discrete Op amp rolling could be experimented to enhance the sound quality to the next level. Bare in mind these upgrades are not cheap

Use them with Wharfdale Diamond 12.3i and some old Wharfdale Denon 2 speakers no problems. I've nothing really to compare it with but it works and there is no hum and the volume control is lovely and smooth with no crackle. There is a delay from input to output , which means that if you want to use an active sub woofer you'll need to take it's input from the aux out of this amplifier as that is also delayed. Talking about delays, when you turn it on, nothing happens for a second or two which surprised me but does not upset me.