AIYIMA A70 Mono Power Amplifier with PFFB TPA3255 Mini Class D Amp with Subwoofer HiFi Home Theater Receiver with RCA/XLR/Trigger Input for Bookshelf Passive Speakers 48V/5A Power Supply

オペアンプを換装したら大化けのアンプになった。

Electronics engineer's review will be coming soon (tm) As a consumer, the A70 just works. It is a great amplifier with some really cool features I never knew I needed. As far as I can tell, it meets or exceeds all its specifications for TDP, power output etc. I will be evaluating this in more detail under different loads at a future date so for now I will cover more of the cool features: 1. XLR is a nice to have. I don't personally have any in my setup but occasionally I have used it for odd or specific setups. 2. The +6db is REALLY nice. Some audio sources are really quiet. The worst offender is an LG TV that automatically drops the volume every 30 minutes if you set it above a certain level in the UI. The trouble is, the TV doesn't actually know how loud the room is so this may be going from a comfortable volume to nearly silent. The +6db allows you to get the full range out if this amp with such sources. 3. The built in crossover is cool. Not used as I have a full equalizer for room calibration but I can think of times it would be useful. 4. The 12V trigger is awesome! I cannot wait to build a custom controller for this that allows it to be switched on and off with the rest of my setup to allow for energy savings. I really only have two gripes: 1. AIYIMA already has a product with the name "A70" which could be confusing. They also advertise this as being used for 7.1 surround setups, but having 8 of this seems like it would require excessive tinkering to get a room to sound good compared to an all-in-one receiver that is programmable.

Come al solito ho aspettato un pò prima di recensire. Che dire,lo sto usando con l'impianto HT in mono su un subwoofer con 2 altoparlanti 4 ohm da 25 cm messi in parallelo tra loro. L'apparecchietto,per le dimensioni, se la cava egregiamente: pilota il subwoofer alla grande,senza minimamente riscaldare. Si, lo consiglio!

Manque cruel de punch. Incapable d'alimenter un sub 12'. J'ai dû le retourner. Sinon objet joli.

Great amplifiers. I have tried quite a few amps over the years and these perform very well. The price to performance ratio is truly impressive. The A70's provide a wide soundscape with excellent detail retrieval and separation between the notes with a slightly laid back sound that I can appreciate. I also tested them using a set of older JBL speakers that have some slightly "bright" tweeters and I found that these Aiyima A70 Monos paired better compared to the Fosi V3 Monos I had connected previously. I am constantly very impressed with their sound quality. I then connected a powered Subwoofer and to my surprise I found that the Crossover knob on the back of the A70 worked better than the Subwoofer's Low Cut knob. I used a small screwdriver to make micro adjustments when dialing in the Low Cut on the 'Sub Freq' dial on the rear. A great feature that I was not expecting to use. I opened up the amp to inspect the build and immediately noticed that the A70 has a bigger and better heat sink compared to my Fosi V3 Monos, and they do indeed run cooler. There was plenty of power for my speakers and I only noticed a tiny amount of distortion at really high volume. I suspect that they may not sound quite as clean with really power hungry speakers at really high volume levels. I would easily recommend Aiyima A70 Monos and I am happy I bought them! (streaming Tidal, SMSL D0100 DAC, Mogami XLR Cables, 2 x 48V 5A GAN power supplies).