AIYIMA A07 TPA3255 2.0 Channel Power Amplifier 300Wx2 HiFi Class D Stereo Digital Audio Amplifiers Sound Amp For Passive Speaker Home Audio DIY with 32V Power Adapter

I purchased this amp as I decided to use my Monitor Audio Gold GX100 speakers again. I currently have a Denon Ceol N9 pushing some Dali Spektor 2s but thought the Monitor Audio’s needed some more oomph.Unfortunately, I could only connect into the Aiyima A07 through the headphone out socket on the N9 but it has done the job. So the current configuration is is the Ceol N9, into the A07 amp which feeds the GX100s. I have to say that even through this less than ideal scenario, the sound, to my ears anyway is stunning.I now have the upgrade bug and am going to try to improve the sound even more, but on a limited budget. I’m looking to buy a relatively cheap classic, but we built, CD player on ‘fleabay,’ and use it only as a transport device. I’m looking at an old Marantz, Sony, Arcam or Rotel. These can all be got for around £50. I’m then going to either buy the Aiyima A5 Dac Pro with an ESS9018K2M dac chip or the Aiyima A3 Dac with 2 x ESS9038Q2M dacs chips, and feed the audio into the one I finally buy through the CD players digital output(s). The dacs RCA outs will then going into my A07 amp, which will finally power my G100s.So basically, really impressed with the Aiyima amp and now looking forward to buying one of their dacs!

SUMMARYIt's a fantastic sounding budget amp with great power output.DETAILSWhat kind of a user am I?I don't claim to be an audiophile with many many years of experience but I do care about audio quality and I love trying different devices within a reasonable price range.I have tried several budget preamp/DACs/Amp/Integrated Amp combinations to this date and I will write my review based on my personal experience and comparisons.What is my set up?- A small room, everything on my desk with speakers close to me. Ceiling is high (3.5m)- A pair of Q Acoustics 3020i- Aiyima T8 headphone preamp/DAC- ifi Zen DAC v2- A Windows 10 PC with USB & Digital out- A mobile phone with bluetooth- Different audio streaming services with ultra quality / MQA outputWhat is included in the box?- 32V/5A UK power brick- A user manualWhat is not included in the box?- No kind of audio cable for connecting to the sourceBuild Quality- Looks beautiful and feels very solid- I like the compact design, it's very easy to place on your desk and under/over your DAC/preamp- Volume knob and power switch at the front feels very solid- Similarly input and output ports feel very solid at the backSetting up & connections- Very straight forward to set up. Just be careful to keep the power off when connecting to your speakers like normally you would do for any amp.Couple of things to mention about connections:- There is no subwoofer out, passive or active. However if you want to use this with a powered (active) subwoofer, you can use it as long as your subwoofer has the right ports (many of them do). Just run the output from A07 into your sub and then run its output to your speakers. A simple search online can lead to the guide.- There is a line in and also a 3.5mm input however there is no switch. The manual also says not to have them connected at the same time because they would run at the same time.Power outputAs I mentioned I use it to drive my speakers in a small room. Admittedly Q Acoustics are efficient and easy to drive but the power output can easily drive more difficult speakers. In terms of loudness, if I use this directly without a preamp, I can't go beyond 40% on the volume know before it starts getting uncomfortable that close and it can get very very loud if you turn up.32V seems to be very powerful for my setup. For more power hungry setups you can buy a 48V adapter or for lesser requirements you can go down to 24V. However reducing the power of the adapter may cause sound distortion at higher volumes so do your research.Sound qualityI used the device with 2 different methods:1- Connecting directly to my PC with line in2- Connecting my PC to my DACs through USB, BT and optical and RCA connection from DACs to A07.With line in it already sounds very clear and rich, if you go for full budget setup this is already it. It sounds beautiful and loud.However when you connect a DAC to A07 as a source, things get amazing. It sets a better sound stage, it gets more spacious, everything is clear and it sounds fantastic. I definitely recommend using a DAC with this thing for max benefit.Even comparing to more expensive amps I tried (up to 200£) and my well known brand 5.1 receiver for my home theatre setup, I experience no difference in music quality.This is of course personal at the end of the day. For my experience, I'm very happy with it and I don't feel differenceMy main combination is USB from PC to a DAC and RCA connecting from that DAC to this A07. Overall this is a very compact, efficient, budget friendly and high quality setup for my taste.CONCLUSIONFor convenience it would have been nicer to have a active sub out so that you wouldn't have had to deal with additional setup and paying for more cables but I'm guessing they have to cut costs from somewhere.Adding a passive sub out would probably require a more expensive device and that's not the point here.The point is, this thing sounds just amazing and at this price it's a no brainer. Best price / performance I got from a budget amp.

My Aiyima A07 arrived two weeks ago and I’ve been very surprised at the sound this little amplifier produces. I left the review a while because I've read things about running the amp for a while to allow the components to 'burn in'. I do think this has had an effect.Listening to a test track I was surprised at the grip on the music. 3 separated tracks seemed to be playing: the bass line was separate from the rhythm and both were separate from the vocals. And then the drums kicked. The song was more than I had heard it before, and the experience replicated on almost every track I listened to.I was replacing a broken Marantz PM 7200 – which I often listened to in Class A mode – and I was not expecting the Aiyima to match it, but at times it betters the Marantz. Listening to PJ Harvey I can hear her breathe, listening to Brant Bjork I can hear him play the guitar – which is different to hearing the sounds the guitar makes. Listening to ‘Oh Me’ on Nirvana Unplugged I can hear the change in pace at which they play parts.Youtube reviews speak of a ‘holographic sound’, I had thought this meant sitting in the sweet spot, but the depth I’m hearing between layers is very surprising. This amplifier seems able to keep time when playing music better than anything I’ve heard – and as good as it is, I’m excited to change the opamps to see where else it can be taken. This is amp is very good – not only for its price. Where a musician puts an instrument in the studio, that’s where it is in the song.Just one more thing – I can hear the grain in guitar fuzz tones.The above was written with the Aiyima A07 fed by a Behringer UCA202 DAC, which is not a good DAC, but the Aiyima sounds great. When I run it from my Topping E30 it sounds even better. The speakers are vintage B&W DM1. This is a good amplifier.

Used for a day so far. Overall good amp. I'm using this to drive q acoustics concept 20 (6ohm 75-100w). Sound quality is pretty good, a bit bassy compared to my regular marantz amp, but a little adjustment in windows EQ can sort this out, maybe it needs to break in. Volume wise, it's loud enough at 50% and do not cut out like Fosi Audio V1.0B I tried before this. Build quality is very good, the case feels tight and solid connection fits snug and the volume knob is smooth with good markings. Happy so far.