Sabaj A20a 2022 Version Power Amplifier MA5332M Chip Class D Bridge tie Load Provide 350W Analog, Bluetooth 5.0 XLR RCA Input, RMS 170W x 2(4Ω) 0.004% THD+N

I bought 2 on sale and bridged them. Paired them with the 10d 2022 using XLR. Music is streamed via USB. This is arguably the cheapest way to start my "budget-fi" journey. They are quite good sounding on my R3. Base is fast and clean. No hissing, huming of any sort. The 10d 2022 DAC is good too, very quiet. Overall, very happy with the amps. Nice fit and finish and just enough power to play loud if you choose to. Otherwise, I have them set at 12:00 o'clock and let the DAC control the volumn (usually at around 50, half way point as well), quite loud already and yield around 75 to 80 dB sitting 7 feet away from the speakers. I also used them on my ELAC UB5 and these amps made them sound more "alive". I wouldn't buy just one 10a though. Buy a pair and bridge them. If you want to just buy one, get the 20A.

SMSL and Sabaj 2 brands from the same larger company; they are the only brands using this amplifier chipset: I was excited to have found this product and ordered two to run as monoblocks... According to Google: in 2022 the Sabaj a20a stopped being sold; it was returned to the market with a redesign that included a totally new power supply. I've seen no data that the revised version wasn't also sold in 2022, and A customer would have no way of knowing, because they look exactly the same and have the exact same specifications. It seems this seller is using the term "2022 Version" to indicate that you will receive the model that stopped being sold due to multiple significant issues. Of course you have no way of knowing this... What I received were 2 amplifiers that are unusable and seem likely to cause damage to my other components. The amps have high levels of hiss/hum that, according to analysis from multiple different AI agents, is attributed to the unshielded internal PSU (the one that was replaced). This occurs even with no inputs connected, with no other devices connected to the AC circuit, and at zero volume - so the noise is absolutely coming from within the amp itself. And not in some "normal" way, this is a problem. The amp will make sounds like "crack" while adjusting the volume - or just randomly. I'm unsure what that is attributed to - but it is a common characteristic according to forum posts. In the limited amount of time I spent actually trying to listen to this amp (before I became concerned for my speakers and other equipment) I experienced it "shut off" multiple times - just in the opening minutes of "Godzilla vs Kong." It wasn't hot... it just kept shutting down during loud sequences in the opening montage. Worst of all: the amp causes an insane ground loop with other equipment - whether on the same AC circuit, or just connected via RCA cables. I have a LOUD hum/hiss coming out of speakers THAT AREN'T EVEN CONNECTED TO THE AMP! I have never seen anything like this with home audio equipment, and I don't believe it is a simple "ground loop" issue. This amp doesn't connect its the safety ground to the chassis and then to the RCA terminal ground with a $.01 transistor - it connects the ground line from the power cord directly to the amplifier's daughter board. With no connection to the chassis! So, if the power supply (the one that caused sales to be halted and was replaced) has an issue and arcs to the metal box that you, your kids, or your pets may touch - that electricity would need to travel all throughout the chassis, somehow make its way up to the amplifier daughter board, then somehow make its way through the traces all the way back to the lug that connects to the ground wire - and then out of the unit and into your AC circuit. I'm sure this somehow, technically, meets some code; but it is a higher resistance path than chassis-to-ground, it is not how you or I would design something, and - combined with the fact that this power supply needed to be replaced - it's not something I want in my home. I have spent so much time looking into all of these issues, genuinely trying to get this product to perform. Then I come to find out that these issues are well-known, and that the product had a SIGNIFICANT internal redesign to try and resolve the exact issues I'm having. Well, I feel like I been scammed - like someone is trying to clear out their leftover inventory of the "problem" units. None of this background would matter to me if the product performed - but it doesn't. I wouldn't recommend buying this unless 1. You are looking for a project; 2. The price drops so far that it's cheaper than buying a new *proven* all-in-one board.

The people that say anything negative about this amp are crazy. This is 5 stars all day long. There amps have some of the best components and are very well put together. The ones that have the ice are even better. They should charge 30 x what there charging . These are beast in the true form

I bought two units to use as mono blocks. I use a tube buffer to add warmth in my setup. I replaced my Emotiva amp with these and there is very little sonic difference. The sound is clear and full bodied, just slightly brighter. I’ve had class D amps that got loud but sounded lifeless. These do not. At very low listening levels there is a channel imbalance (one is louder than the other). However, this only at very low levels. Even if you used as a desktop amp for near field listening, it wouldn’t be an issue. Also, these amps are quiet. When connecting the speakers to the amp, volume maxed with nothing playing, there is only a feint hiss with my ear close to the tweeter (using JBL 530, 87db sensitive). I’ve used them 3 days on the JBL and Goldenear Triton 7 with good results. These are powerful little amps that have not gotten warm. The build quality is solid. The case is aluminum with vents on the rear and possible heat sinks on the side. The amps are not heavy but have heft. They don't feel cheap. The power switch, however, does feel cheap (not cheaply made; inexpensive). It’s a large piece of plastic. The volume knob turns smoothly. It doesn’t scream cheap but I wouldn’t characterize it as high quality either. Considering it’s cost, it’s perfectly acceptable. The amp accepts RCA and XLR. I have not and likely will not try the bluetooth. I use them only as power amps. One clarification; the rating states 170x2 into 4ohm, that's at 10%THD. 1% is likely closer to 150x2; still, enough power to drive difficult speakers. In bridged mode, 300 is more than enough. Why 4 stars? I need to give it more time. I’ve had amps that sounded good and were powerful that lasted only 3 months at causal liaening levels (Hi Fosi Audio E10, I'm referring to you...). Let’s see how long these last. Hopefully for a long time!

This speaker amp had all of the makings of what would be a great amp. It is incredibly powerful, with great measurements and the ability to run as monoblocks. Furthermore it has a low pass filter built in and on top of that it has looks to back it up. Now why the low rating? The low pass filter is not for an active subwoofer out as many would have reasonably assumed, rather it is to use this as an amplifier for a passive Sub. Who in their right mind owns a passive sub these days. Sabaj was so close to making an absolutely killer product if you could run these as monoblocks each with their own low pass filters to run with dual active subwoofers. Instead they expect you to own 4 of them, instead of 2 and use them with passive subwoofers (and presumably be running from two independent DACs to duplicate the right and left channels) . What a waste of a great design. Not quite sure why they included bluetooth on this product, it is convenient but ultimately sounds pretty bad (quite a barebones implementation), could have done with just skipping that. Would have preferred if this came with a remote as well, but I'm not too torn up over that. I am hoping that Sabaj takes this as an opportunity to return to the drawing board and reinvent this product, because everything is already there.

I primarily purchased this device with plans to run them as monoblocks. There are very few options when it comes to cheap(er) monoblocks, so this was an easy purchase considering they are only $400 a pair. I’ve mostly used amps in the 30W per channel range and figured I’d try something with a bit more power for my Wharfedale Lintons. My two units shipped about a week apart, so I got to spend some time with a single A20a running stereo. Right off the bat, I got a huge increase in volume over my PA3s. REW and my UMIK-1 would achieve a 75db test tone with the PA3s at -24db on my DX3 Pro+. I achieved this same 75db on the A20a at -34db. Subjectively, I thought the bass had a bit more control and perhaps a bit more upper presence to the sound. Curious, I graphed them both on REW. They were essentially identical, with the A20a being about half a decibel louder, just enough to see both colored lines precisely mimicking one another. That being said, it sounds every bit as good if not a bit better than the PA3s. Or in other words, does not have a detrimental effect on the music. Having the extra headroom is a nice bonus too. The PA3s is still much quieter when it comes to hiss from the speakers while idle, so it may be the better pick with sensitive speakers or if sitting nearfield where it’d be easier to hear. So that’s with one. How much better can it get with two? Well unfortunately, I cannot recommend buying these with the intent to use them as monoblocks, at least with RCA connections. With a single A20a, I’d have the volume maxed and only get a slight hiss when I was near my Lintons. It didn’t matter where the volume dial was, the hiss was consistent and remained the same volume. In BTL (mono) mode, I’d have similar hiss levels when at half volume and it would substantially get nastier as I turned it up. Just like the super noisy Rega io, half volume is as high as I could go before the noise became too distracting, rendering the remaining half of the dial unusable. With the A20a, the hiss/hum was very unpleasant, more so than the io. Tried both units separately in stereo mode, and it was back to being pretty quiet. My only curiosity was if this issue would persist if using the balanced connection instead. So, removing the input cable factor, I connected one A20a in BTL mode to one of my Lintons. I flipped the switch between RCA and balanced input. Bingo! The balance setting was a great deal quieter! About the same hiss volume at full as the RCA was at half. Still audible, but bearable. So I would NOT buy these for mono use if using RCA inputs. So what was louder? A20a as monoblocks with the dial at half (the max noise I will tolerate) or an A20a in stereo with the dial at full? The single A20a was significantly louder! That was the dealbreaker right there. I’m not going to use two of the same amps when I get more usable power out of one. Again, balanced or bust. That being said, I didn’t get all that much more volume even when the dials were maxed in mono mode compared to stereo. There was a huge volume difference going from the PA3s to A20a, but a much smaller difference going from a single A20a to double. The added noise definitely isn’t worth it, double the chance for unit failure isn’t worth it (multiple “red dot” failures reported over on ASR), and twice the effort in powering both on/off each listening session isn’t worth it either (I had mine opposite each other on my Linton stands). Oh well, it was fun to try. At the end of the day, I do like this unit… kinda. I wish it came in black, but I also wish Sabaj left out the unnecessary bluetooth, low-pass filter, and the volume dial. Make it strictly a power amplifier. Sure, the plasticy power rocker and knob could feel of higher quality, the blue light could be less bright, and the unit itself could use a visual facelift, but I’m more concerned with having features I don’t want or need. Those savings could have been passed on to the customer and made these even more competitive in their price range. All is forgivable if the unit performs as expected, but as described above, this one’s a toss up depending on your use. Still, I think it’s a good buy at $200, especially if you need power for cheap. As for me, its back to the PA3s.

works really well in mono block or stereo configuration. sound is a bit cold and analytical , however it sounds AWESOME paired with a TUBE preamp or warmish DAC.

First of all I want to say that the "2 star" reviews seem really unjustified in my opinion. Especially after reading their reviews. This is not a bad amp. It just tries to do too many things. There was a previous reviewer that mentioned that, and I thought how is that a bad thing, well it is. Sabaj should make 2 versions of this amp. A bridgeable version, and a straight stereo version. If you want to use this as a mono block, I would not recommend this amp. Having no remote trigger, then having to turn two amps on and adjust the volume is not the way to go. The power switch and volume control do not feel like they are built to last. Also the binding posts are cheap and found on $40 amps. When I first turned the amp on, I heard nothing. When I started to pull the speaker plug out of the terminal I heard sound. The binding posts were not screwed all the way in. I screwed them in an still heard nothing. After pulling the speaker plug out a couple of times it worked. No issues after that, but it is concerning. When it was in bridge or "BTL" mode, it was hooked up to a speaker that was 87db, 4 ohm, 200w, 350w peak. It did push this speaker decently, but I didn't do a full review as I was already disappointed. In stereo mode the speakers were mush. This seems like a step up from the desktop amps that are selling like crazy, and it should do well in most systems. Just know what you are looking for and have some efficient speakers, 90db or higher. Contact me Sabaj, I'll double your sales.

Ne ho presi due e li uso in configurazione mono per le vie dedicate ai bassi in una configurazione di multi amplificazione attiva, il risultato è eccellente, riescono a pilotare i woofer da 30 cm delle Kef 105 in modo superiore ad amplificazioni in classe AB estremamente potenti...con un consumo di watt bassissimo.

Paired with the visually matching a20d 2022 Dac these amps do a great job. Smooth, detailed and powerful. Impressed!

Po przesiadce ze wzmacniacza klasy AB jestem zdumiony, że tak małe urządzenie jest w stanie napędzić kolumny podłogowe. Miałem obawy czy brać 1 czy dwie sztuki, ale do głośności których używam pojedynczy w zupełności wystarcza. Dźwięk bez zarzutu, kompletny zestaw z zasilaczem, porządna jakość wykonania, do tego można odtwarzać bezpośrednio przez bluetooth. Podłączyłem do Creative G6 i streamera olio. Przydało by się jeszcze jedno wejście na gramofon. Polecam, zwłaszcza na promocji.

Bueno pero no llego con el cable correcto