AIYIMA A70 Mono Amplifier with PFFB Home Audio Receiver,TPA3255 Class D Amp with Subwoofer for Home Theater Bookshelf Speaker,with XLR & RCA Inputs & Trigger Input

I'm currently using two of the Aiyima A70 mono amps that work great when paired with Dynasty ProAduio PX2 pre-amp. I wasn't able to run amps at full bore due to sound was too loud. No joke. Previously, I was using a Douk tube preamp which until it went out within 3 weeks of use. I thought sounded good until I decided to paired with the PX2 preamp, and they work really together. The Aiyima is clear and articulate as any full size amp I've had used before. I'm talking about NAD, Adcom, Hafler or Yamaha.And I had them cranked to just over 1/2 where the sound was too loud with no distortion or breakup. No Bluetooth with this amp. I was surprised at the headroom given, and the attack time was spot on. I'm not joking. But how long with these last, no idea. I got these new on sale, one for $118 and the other was $85. I highly recommend, will fill a room 18'x15' with no issues and volume to spare. So far a strong 4.5 amp!

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.

This is a mono (1-channel) audio power amplifier, but provides one full-range speaker 50-watt powered low-level output, and one subwoofer passive (mono RCA) output. I hooked it up in concert (Daisy-chained) with another 2.1 channel amplifier, and it sounds amazing, when I synced the timing.

[edit: I misspoke, the 12v trigger, handshaking issue is with my WiiM Ultra] There's a lot to like about the Aiyima A70 mono. The build quality is 5/5: it has heft & excellent heat dissipation. Thanks to the well thought out, large contact point, between the underside of the board and the case. Making the case the heatsink; just like its closest competitor. But unlike the other company's dedicated mono block (not the one pictured), this unit doesn't require fans, to keep it from having a core melt down (I'm exaggerating, of course, . . . kinda). There are two points that I don't see being well publicized: 1. Both front dials are indexed (+) 2. The 12v trigger has some handshaking issues with the ZA3 (-), confirmed by Aiyima and unfortunately, that last point keeps the A70 mono from being part of my audio chain.

This amplifier has loads of improvements over other similar amplifiers: - Beautiful Solid case work with sufficient size and spacing between connectors - Very powerful and clean sound with +6dB gain for RCA connection - Active subwoofer output with low pass filter adjustment - Mono full-range amplifier and sub-woofer amp modes - 12v trigger inputs works well with my DAC Improvements: - No pop sound on power on/off, every other amp has this issue but not this one - Does not heat up like others, somehow better thermal performance - Good quality speaker connectors, I am using 12 AWG wires without any issues HIGHLY RECOMMENDED

First of all must explain how this amp works. There is a switch on the bottom to set it for full range or subwoofer. When set for subwoofer duty, the front panel knob on the left adjusts the low pass frequency. Great for adjusting by ear while listening to music or test tones. Perfect for use with a passive subwoofer. I see online reviews that complain about the fact that this does not have a high pass filter to use as a full range mono amp. That is not its best use case. I am using mine with a 12" passive subwoofer I built myself and it works great. I think it is a much better amplifier than a lot of the low cost plate amplifiers out there and the cost is very reasonable. I love that these come with 48 volt power supplies instead of the 32-36 volt supplies that some of these low cost amps come with. That way I don't have to spend more money to upgrade to a 48 volt supply. I will add that this mono amp integrates well with the Aiyima A20 stereo amp which has a high pass filter and a subwoofer out. Last note - if bottom switch is set for full range, there is a small knob on the back that sets the low pass frequency for the subwoofer out on the A70. I really only have one possible negative. This works best with a high efficiency 2 or 4 ohm sub - something that can do 90 dB @ 1 watt. My 12" sub does that easily. If you have a small low efficiency sub, then this amp may not produce enough volume.

These are good. CRAZY good. Very, very surprisingly good. The TPA3255 + GaN power supplies have really skyrocketed the performance of these cheap Class D amps.

Prodotto come da descrizione

L社の125w/chの4チャンネルデジタルアンプ(定価25万)を本機4台に置換し、マルチアンプで以下のアルテックシステムを駆動した ホーン:803B/1.5インチドライバ ウーファ:402A/オンケン箱 ツイーター:コーラル プリアンプ:Xone92 チャンネルデバイダー:Ashly X-1001 一聴してA70monoの圧勝:音の立ち上がりが峻烈かつ抜けが良くなった。前後の空間表現についてはまだ望む所があるが、この価格、この大きさでこれだけ鳴れば充分合格だ。 これまでのアンプではこの大型ホーンを鳴らせなかったのが明らかとなった。48V/5AのGaNスイッチング電源、PFFB確実に中華デジアンは進化している。 これに、特注のアモルファス、コンデンサアレイをかますと空間表現が増し一気にワンランク上の音になる マルチアンプの場合1chずつ出音を確認出来るのはメンテの場合圧倒的に有利だ。また、各ユニットに付随する音量のバラ付きを考えると各チャンネル毎に音量を調節出来るメリットは大きい A70monoは買いだ。 ホーン:Altec 805B/1inch ドライバ、 ウーファー:Altec 416-8B , エンクロージャー:自作バスレフ箱(120L) プリアンプ:Xone 92 Aiyima 07Max2台から本機に変更した。 XLR/RCAを直に挿せるのは使用上メリットが大きい。また、ON/OFFスイッチが有るのも、アンプパワー設定を保存出来るので便利だ。 07Maxでも”スピーカーが変わった”かの様な出音の改善に驚いたが、本機では更に迫力が加わった感じ(但し電源の工夫が必須だか)。どうも価格22万円の500W/4chのDアンプよりトルクがあり、締引き締った低音が出る印象だ。 結論として4万以下で大型スピーカーを駆動するアンプならこの一択だ。 今のマルチアンプシステムへの変更導入も充実アリだ。

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

Das ist die Zukunft der TPA3255 Amps, diese Endstufen haben keine der Eigenheiten der einfacheren Konstruktionen, sie sind extrem sauber im Klang, arbeiten mit sehr verschiedenen Lautsprechern hervorragend zusammen, und haben wirklich Leistung ohne Ende. Auch die Lautstärke auf beiden Endstufen gleich einzustellen, ohne sie voll aufdrehen zu müssen, erwies sich als viel problemloser als gedacht, erstens sind die Regler gerastert, man kann also mitzählen, zweitens sind die Lautstärkesprünge pro Raster genau so dosiert, das man sie gut hören kann. Sie werden kaum warm, weniger als jeder Transitorverstärker, sind komplett leise, also weder Rauschen noch Knacken beim Einschalten, noch sonst irgendwas. Mitgeliefert werden richtig gute 48V/5A GaN Netzteile, eine neue Technologie, die kosten einzeln schon um die 50 €. Eine gewisse Möglichkeit den Sound zu beeinflussen hat man mit der Wahl der Eingänge, RCA ist dynamisch etwas limitierter, und sanfter, XLR ist wirklich SO sauber, das man denkt die Anlage wäre kaputt wenn eine Pause in der Musik ist, so ruckartig passieren die Klangereignisse, ohne jede Vorwarnung. PS: die ersten paar Stunden klangen sie noch etwas scharf, das war jetzt am 2. Tag weg

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).