AIYIMA A70 Balanced Stereo Amplifier with PFFB,TPA
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About AIYIMA AUDIO
Focus on audio products of Tube Amplifier ,Audio Amplifier,Preamp,DAC etc.
Our company Offer Design& Research and Development& Producing and Marketing ,OEM
We use the best components available in the design to satisfy your listening pleasure
Product Dimensions : 5.74 x 3.15 x 3.74 inches; 2.43 Pounds
Item model number : A70
Date First Available : March 8, 2024
Manufacturer : AIYIMA
ASIN : B0CXJ7LC88
Country of Origin : China
【With PFFB design】The AIYIMA A70 is the first stereo home audio Class D amplifier on the market based on the TI TPA3255 chip with a post-filter feedback loop (PFFB),The A70 Class D amplifier with PFFB implementation,it have no load dependency together with lower distortion
【Six-Layer Amplifier PCB Board & Four-Layer Tone Board Design】Provides better electrical isolation and impedance control,Achieve superior sound quality and high performance,Boosts signal stability and audio purity, enhancing performanceand interference resistance for superior sound output
【With 12V Trigger Input & RCA audio input】The trigger input to allow one button power up of the audio chain from the source,Simple and convenient; There is a switch to add 3 dB of gain to RCA input. This gain switch can be used to boost the signal input at RCA inputs
【With balanced input】the AIYIMA A70 Stereo Amplifier with XLR audio signal input ,This design minimizes interference and reduces noise floor
【With RCA & Sub output】Add the sub output with variable filter output,The sub output is controlled by the volume setting,and Added adjustable cutoff frequency (20-150hz/20-600hz) for low-pass filter output,Easily build 2.1-channel Audio systems to match any of your desktop speakers
【Professional Audio Components】Simple appearance with professional audio components provides excellent performance,With a measured SINAD of up to 96dB and a SNR of 116dB, it delivers exceptional audio quality.Excellent in Class D amplifiers; And upgraded high-quality terminals help to install more robust speaker terminals
【With 48V 5A GaN Power Adapter】The use of GaN transistors allows for high efficiency, low heat, safety, reliability and stability,to delivers strong amplification for your amplifier speakers
【Replaceable op-amp chips】Explore subtle changes in sound quality by swapping out op-amp chips to add to your customization fun,such as Sparkos SS3602, MUSES02, OPA2604, OPA2134PA, OP249, AD827, RM4558, LM4562, LME49720HA, etc
Patrick G. –
A fine bargain amp!
Used with 4 and 8 ohm stand mount speakers. This mini amp has great sound with deep bass and dynamic highs. Equals my expensive amps for sound quality. The amp is not going to drive large, multi-driver speakers in a medium to large room unless they are well over 87db sensitivity.
XXTwnz –
Very good so far
I’m using this amplifier for a desktop audio system with Revel M105 speakers and a WiiM Ultra acting (poorly) as the preamplifier. I wanted plenty of power since the Revel’s have only 86db sensitivity. I considered Hypex and Purifi DIY amplifiers that rate very highly but are overpriced for a PCB in a box. Technologically this amplifier has everything those do for much less. The majority of the design and the TDA3255 chips were made by Texas Instruments, including PFFB. As for the implementation, I have to hope Aiyima followed TI’s design guidelines and used decent components so this amp has some longevity. We all know Amazon reviews are like JD Power car reviews, only good for initial impressions and not long-term reliability.I have no problem with the separate power brick since it can only improve the audio signal by being outside the case with its noise and heat. You are also somewhat protected if the PS dies since you can get another without throwing the good part of the amp away. A third benefit is you can buy a power supply with more wattage to increase the output of the amplifier if you need it.Please note that the specs for this amp are like all from the far east. Exaggerated and unreachable. Some of the blame falls on TI for listing a ludicrous power figure @ 10% THD in their own data sheet. Nevertheless you can still get an honest 150-200 watts per channel with inaudible noise and distortion that rate far below .01%. With Post Filter Feedback (PFFB) the load dependency from the speakers is eliminated which means the frequency response is flat from roughly 20 to 20K Hz. Brilliant.So far this device has done exactly what I wanted. A class D amplifier based on the state of the art design that eliminates all the shortcomings of old class D. I’m not going to tell you it sounds “sweet and melodious with musical but not bright highs” because that doesn’t mean anything to anyone. It sounds like _nothing_ which is the best compliment an amplifier can receive.
lpniles007 –
Amazing sound
Looks cool but sounds great, very powerful.
Yan N. –
Superb balanced TPA-3255 implementation
I’ve always been a huge fan of Aiyima products, especially their TPA-3255 implentations. I do a little DJ on the side, and I was eager to try out a new setup with a pair of passive tower speakers + powered subs along with this amp. I use furutech XLR cables. It complicated setup a bit, but its well worth the boost in fidelity. I use furutech interconnects. Was going to use my own 48V 10A active pfc power supply, but discovered the stock power supply is actually quite advanced so I took a chance, bringing my other unit along as a backup.It did an excellent job of driving the speakers with plenty of headroom. Very low noise floor, clean and neutral, with tight low end. I’m an audiophile of 20 years, and others have said I have a good ear for evaluating the sound quality of gear. This is out of the box without any internal tweaking like I usually do (op amp swapping, recapping, etc.). Very pleased with this unit so far. Anything more fancy and expensive than this will be way past the point of diminishing returns. Highly recommended.
Stephe Koontz –
Best small amp I have listened to!
I tried the A07 Max and while it was decent, it wasn’t game changing to my ears. The A70 on the other had sounds so much cleaner and has nice tight bass. I went ahead and opened it up and installed some Sparkos Op-Amps and thing thing seriously sounds amazing. Especially for the all in cost, you aren’t going to beat it.About my system, Klipsch RP600M speakers, Topping E70 DAC and my vinyl setup is a Technics 100C AT-540ML cart with a tube based EAR834 clone phono pre-amp.
Carl1234 –
Sounds good but started making a lot of noise
After a few days of usage, I started hearing loud noises coming from this little amp frequently, to the point where I have to turn it off. This was with the 48V10A power supply.
JGatHome –
Worry free (from speaker interactions)
I’ve only used this with some speakers that I converted to passive (longer story). I don’t have the tools to check the complex impedance after my custom crossovers. I was worried that these could be hard to drive. This amp makes that typical class D issue a non-issue.They sound great. I paired these with a Wiim Pro and I’m a happy camper.FWIW, I was surprised how much more pleasant the music is with Wiim room compensation.
DrDave –
Amazing class D amplifier, but not for me
This Aiyima A70 class D amplifier is small & powerful. I’ve been into audio all my life, both as a music listener & my career (EE). I have 5 high quality systems, both tube & solid-state. The A70 sounds OK for casual listening, but just doesn’t do it for critical listening. Imaging is different than any of my quality amps, and it has a mechanical coloration that I can’t live with. The other thing I really disliked was the power switch, which requires a touch of the volume knob to it turn on. If you hit it a second time by mistake (easy to do), it jumps to the balanced input, even though unbalanced was selected by the rear switch. The quirky power switch bothered me more than the sound. I really tried to like this amp.
Matt Emburgh –
Purchased this amp to take the load off my Denon 3800 receiver. They are powering my front tower speakers with no hesitation. The sound quality is powerful and perfect. The trigger on/off feature is awesome. Clarity and detail are perfect.