No background music please! Really distracting for me

Honestly, KZfaq needs exactly this type of objective review on cheaper gear. Thanks, I hope this channel grows!

Hey! Good job! I'm here because Cheapaudioman recommended your channel and I'm glad to see I like what appears to be your first video. I'm looking forward to more. I've subscribed so I can see where the channel is going. Good luck with it! 🙂

Great information in this video. The music and narration are crack up. The music makes me feel like I'm sunny and cheery; it's like I'm a child again. And the bot-like narration is also just as weird. I was considering buying another A-07 but, with the knowledge I've gained from this video, I'll probably go with the Fosi. the fact the Aiyama is downgrading it's components to increase their profit margins is very helpful to know.

A solid first effort. I'll give you a sub just for the teardown. It's nice to know what's inside these things and how they perform. I know others have complained about your music but it wasn't too bad and I got somewhat used to it. At a minimum turn down the volume next time and make sure it's the type of music that won't draw attention to itself. Despite what others have said, I would still recommend background music if you're going to use narration software. I could be wrong but I feel like it would balance out the voice and keep it from being its own distraction. Anyway, I look forward to your next video.

14:03. I 100% agree! Volume and power really should be different controls! 1) I do not want to adjust my volume level when I turn the device on and off! 2) I do not want to place a bunch of wear and tear on the volume pot just because I want to turn on and off my device everyday.

THIS is the type of rigorous testing and reviewig that needs to be done. Too much lip service on audio products these days.

All the best of luck with your new channel, dude! Subbed! (I just ordered one Fosi V3)

Your review and analysis was great and informative. Some comment on sound quality would be useful. Keep up the great work!

One of the best comparison and review videos I've ever watched. Please keep making such videos. Good luck.

Nice test. I'm probably getting the V3 with the WiiM Pro Music streamer. Thank you!

Great first video, would be keen to see the SMSL A50 next.

Very good review. I appreciate all the work that went into this, and i hope you continue praying reviews like this one.

We need more channels like that. Subscribed

Great review! It would be nice if we have measurements with 48V/5A PSU (max power, THD, etc). Not to mention, I subscribed to your channel.

would love to see a battle beween v3 or a07 vs a similarly priced vintage amp

The Fosi V3 actually measures cleaner than a $625 mini Gan 3 class D audio (brand) amp

I must commend the exceptional quality and depth of your video presentation. Being deeply rooted in the audio electronics domain, I truly appreciate the nuances you've brought forward. Regarding the Fosi Audeo V3, I'm genuinely intrigued to understand its performance metrics when powered by a 48V supply. Could you kindly share those specific test outcomes?

Instantly subscribed. ❤ Fantastic video.

Wow first video, gets a shoutout and linkup from the Cheapaudioman?!? Congrats great review!

At least you're thorough on testing and actually have equipment that works. One "diyaudio" channel just said "my equipment died" and didn't measure it at all, instead of holding off until he got working test equipment.

I *suppose* I can deal with the "robotic" voice "speaking" the script? This is a bit grating on my nerves, frankly. But good info, at least. The A07 uses Nichicon 50V caps - the brand is quite reputable, but it's the 50V being too close to the max 48V power supply that is the main issue. My issue with the V3 heat sink is that it doesn't have any fins - surface area is how a heat sink works. Yes, there are vent holes top and bottom - but the path in between them is largely blocked by the circuit board. The heat sink, such as it is, blocks a number of the vent holes on the bottom. So - there are still a number of heat dissipation issues that are not ideal.

A very good review. I hope to see more reviews like this.

Incredible video, sir. Congratulations.

Nicely done! The stress tests tell the story very nicely. I've been warning people about the A07s heat problem for a while now. This V3 design from Fosi appears to fix it quite nicely. Can't say I'm happy about the on/off switch on the volume control, though. That said... I've been using A07s in my "sound bar killer" setups for over a year and with a 32 or 36 volt, 5 amp power supply they perform admirably. I also use one in my main stereo system. I've never felt that it lacks power, in fact I seldom get it over 1/4 volume (about 4 watts). There is one negative that should be noted (and this applies to a wide range of these little China-Amps) ... *About half of the NE5532 op-amps in use are fakes* . They are re-branded "something else" chips and I have seen considerable variation in their parameters. I don't believe this is a manufacturing issue. It appears to be "supply side" as there are so many showing up in lots of different places. Of late I've taken to simply pulling the NE5532s out of these little amplifiers wherever I find them and replacing them with RC4558 chips, which cost less than a dollar each. It's a good fix and often there is an audible improvement. But please also be aware that beyond the initial "repair" swap, using more expensive or more exotic op-amps brings almost no improvement.

I like this review and format. I wonder if there are going to be any more videos from this channel. It’s been three months and no new videos.

Interesting, My A07 hasn't had any protection mode or heat problems running off a 48v 12.5A Power supply, it gets warm but there's no cut out even with longer listening sessions / gaming sessions / movie/media sessions. It's had a few tweaks since i got it though, Op Amps, volume pot, binging posts, capacitors and thermal paste for the heatsink, the V3 looks interesting but not sold on the power on / off being part of the volume pot, maybe they'll put out something with a separate controls for that(aware of the BT20A etc). Or what may be nice something with an internal power supply.

The v3 needs a separate power switch.

Great review, insightful teardown and systematic testing 👌 I also agree with the cons you've listed. I hope a future v4 will address these issues, the lack of separate on/off switch especially.

Great test. Very pro level video. What is the power supply you showed in the video and does it test clean?

Thanks for the review. I have recently purchased a lesser known brand of TPA3255 amplifier, the Windom BRU5 with similar heat management design as the Fossi V3. My personal experience of the Windom model is showing that case temperature rised to uncomfortable level with 48V power supply, but at 32V it performed well, granted I never “stress tested” it. One unique feature of the Windom is its built in DSP EQ, which is quite effective to compensate speaker frequency response faults. The EQ function requires additional Windows based software for $20, which I have previously purchased for Arylic Wi-Fi streaming modules. Another benefit of BRU5 is its built in Bluetooth 5.0. I’d be interested to see a comparison review of Windom BRU5 against Fossi V3.

More content please, this is great!! No music in the future please. Test some popular AV Receivers? Subscribed!

Excellent bench tests.

Here because of Randy the @Cheapaudioman , looking forward to more. Well done.

No tone controls, limited space for discrete opamps. I would probably use this as a power amp with a pre-amp for more control and inputs.

Thanks for the comparison video, I'm undecided whether to buy the aiyima A07 Pro or the Fosi V3. I want to bi-amp, I have an integrated stereo amplifier, which of the two would work for me. Thank you.

Amazing review! Please also test speakers

Awesome comparison review. Immediately subscribed 😊 Have you tried other opamps on V3? Which one was preferred by you?

Well you got my subscription . Not sure on the background music, made me want to go out skipping .

10:20. The reason the v3's case temp hit 60c (vs 40c on the A07) is because Fosi is specifically using the entire case as a heatsink, so the case is seeing more of the actual heat being generated, and is actively working to dispel it into the room. Whereas the Aiyima's case heat is simply the byproduct of the air in the case heating up, and then heating the case (still air is a poor conductor, and thus most of the heat isn't being seen at the case, which is why it's overheating). This means the Fosi case measurement is MUCH closer to the actual temp of the TPA3255 package, where the Aiyima TPA3255 package temp could easily be up over 95c. (Most ICs start failing in the mid to high ~90c range.) 10:37. So this is the point, at 66c, the v3's TPA3255 package hit the same temp the A07's package was at, when measured at 40c, and went into thermal protection. That is a very significant difference, not only in operational duration (1.6 minutes vs 10 minutes), but in terms of thermal expression, at about 165% that of the A07! You could probably make the v3 run indefinitely if you simply pointed a fan at it, with no modifications needed. Whereas, an external fan probably will not greatly improve the A07. Of course, since this is a synthetic test, the v3 is unlikely to actually need active cooling in real world usage.

Keep the good work hopefully you will pick up them subs .

Amazing video, please make a similar review for the Fosi K5 Pro gaming

Nice review👏👏

Great video! Might be cool for you to try using your voice and different background music. Good luck with your channel!

more of this please, instant subsribe looking forward for more speaker and amp tear down, and internal inspection.

Aesthetically, the V3 reminds me of those Pro-ject mini amps.

A great and very thorough review 👍 Immediately subscribed... Per (DK)

I bought one, thanks.

Wowww!! amazing video, my friend...this is my first time on your channel, and I immediately subscribed...thank you for your unbiased, scientific approach...I bough an Aiyima A07 a few months ago...it sounded really well but dumped it at the bottom of my closet as it repeatedly shutoff when playing it a little louder...

It looks like I need to drill some holes in my A07s case and couple the heat sink to the case with some copper braid. I have some 2.inch pancake fans that might help too.

Great Video! There's a heated discussion around the load dependency problem of this unit on ASR. Wonder what's your opinion on that issue?🤔Do you think it will be a concern?

nice review! I'm recently came back to audio gear interest with these budget amps. The aluminium casing on these products is absurd, it just seals in heat which is bad for capacitors and peak usage while adding to cost, just to have a professional more expensive look. Can you review the ZK or Wuzhi boards? Can you also review this KGUSS PA8 or similar of different branding?

It is a subjective choice for most people as to what a ‘bargain’ is these days…what some say is a ‘budget choice’ often leaves me thinking they are not in touch with the real world. The V3 is more than one amplifier, for example, the Yamaha AS201 is not. The V3 can be made to sound very similar to an muscular class A/B or a well detailed class A/B amplifier at the switch of two small components at very little cost. Switching the op amps can literally give 2 maybe 3 different sound signatures or in other words sound similar to an new Denon, Rotel or Cambridge Audio…and that’s a fact! I can pick out different op amp that will give me the sound of each one of those amplifiers and just pop them into the V3, now that’s a bargain! The op amps cost a few Pounds/Dollars, the amplifiers that they will sound like cost a few hundred and who is going to buy 3 of them at well over a £1000 or $1300 unless they are very rich? There is also desk space which the Yamaha will simply not allow. These days many, many people only use one input. I have had numerous big amps with many inputs and still found I only ever really used one and that is mainly for a dac over the last 10 years. Then the is the DAC itself that while many amps like the Yamaha have Bluetooth included they will never match the quality of an modern external dac. I had a Rotel A11 Tribute that has superior Bluetooth over the Yamaha and I still never used it and wasn’t better than the external DAC that I was also using. To be honest Bluetooth is awful, it always has been and still is. It was invented for telephone calls and not music. Then we have Airplay which far superior to Bluetooth and with something like the Wiim Mini plugged into a SMSL SU1 and an V3 you will have a far superior sound quality and optional digital inputs than the Yamaha and also cheaper if you shop clever! Something else to consider is the an external dac will be far superior to 99% of all current amplifiers on the market today up to £1500/$1800 and even more! The Yamaha is not a flexible as it is being shown here, it is for adding extra equipment (primarily analogue based) that is also going to cost you a lot more money and only has one choice of sound signature which is good if you like the sound of the Yamaha but you are stuck or having to return it if you don’t. Then there is maintenance, the V3 will be far easier to repair if something goes wrong. So is the Yamaha such a bargain and does it have the convenience that comes with the V3…you decide for yourself but for me I would prefer of the flexibility of the V3 in regards to sound quality and signature, the size in regards to space and maintenance. There is also the fact that you can have more flexibility when choosing speakers as you are not stuck with one stock sound as you would be with the Yamaha as well as other untouchable amplifiers. You can tailor the Fosi Audio to probably any set of speakers in regards to sound and power! If you have hard to drive speakers then the bigger power supply will compensate for that as a smaller power supply will compensate for more efficient speakers…so you may save money there too…

Hey man, are you part of the Fosi audio testing program? Also, nice review!

Man, that was a great video. Thank you so much my question for you is the last time I owned a Fossett audio products and tried to use banana plug clips. It would not stay in the back they kept slipping out. Did you run across that with this unit?

Is that line out jack controlled by the volume knob ... or is it fixed level?

Thank you for a great video. Do you ever do tests using 6 ohm and eight ohm loads? I think this could be very useful for your viewers.

Awesome objective review data and comparison! I wish more reviews consisted of objective data. Great video.

Thanks for an excellent test and video. A quick question: you say the capacitors in the A07 are unknown but in the video you can clearly see Nichicon written on the side of both capacitors?

Thanks for the review. Is there any info you know of on rolling the opamps ? Does it make a significant difference and which ones to go for ?

Where can one find the power supply used in video?

Привет из России! Пожалуйста не останавливайтесь. Делайте ролики снова и снова. Это прекрасно! Я подписался.

What model power supply is the 42v you are using? Where can I find it? Love the comparison!

I am looking for the A07 case modification threads or sources where do i find them? 3:55 i love the one on the top right.

….maybe a XLR or 6.35 Jack balanced version with an orange light instead of blue…

Subscribe from the chief audio man channel! Get glad to see one of these videos and another producer of these, getting back into audiophileism in myself. I guess you could say I had been my whole life. My first record I listen to on my own wason a record player with two records I found in my parents closet. Superfreak by Rick Jamesand Little red Riding Hood, buy I'm not sure who

I will buy The next version that has Amp In to use as power Amp

do you hear any difference while doing a blind test ? thanks

Interesting Thanks

Nice job, really well done testing and video. It would be better without the music.

What was the wattage output using the 48 volt power supply on the V3? Great video 👍 Mine should be here this week sometime.

How it stacks up in TB10D?

4:49 You don't know the capacitor brand on the A07? Is has Nichicon written all over it. What exactly are you suggesting?

I had both of them even replaced their op amp with sparkos and i feel v3 have a bigger sound than the a07 ,sound quality is almost the same, though price wise if you opt for the 48v power supply of the v3 almost the same

Multi tone test plz. SINAD and THD are not enough to identify good amp.

No jack...?

Just love these phony computer voiced reviews , almost seems real

overload at 66,6 this amp is made for rock! 👹🤘

🤣 "Industrial look" Take a gander at the steel mesh + fan modded A07!!

Common, Fosi! Put some tone controls in there 😅

Thanks for the review. I am a recent owner of a Aiyima A07. I was hoping the V3 would have been released earlier, but Fosi's offerings at time of purchase were at best equal to the Aiyima A07. Then it just came down to price. Were the measured differences you saw audible? The ability of the V3 to run at maximum output on a 48 volt power supply, most folks won't be needing that kind of performance. How did it do on a 32 colt PSU? Thanks for the ideas on ventilation for the Aiyima A07, although for my needs to date it's temperature rise has been minimal.

That background "music" sounds like a preschooler show.

Great video, but please ditch the annoying background music next time!

👍👍👍👍👍

Drop the background music, its annoying. I like the videos content.

muy buenas pruebas. Te lo has ganado.

The cheap audio man sent me here. Good vid

Fosi audio wins!

372nd Sub here. Looking forward to more videos like this.

Make the music stop.

89 watts would be impressive if it was into 8 ohms. Using peak watt ratings into 4 ohms is misleadingly exaggerated for products designed for the home. I would rather pay double the price for a stable 100 WRMS into 8Ohms instead of yet another 50 WRMS chip amp. I have some of these products (BT30D Pro) and even on my 4 Ohm bookshelf (I have multiple pairs of varying sensitivity) speakers, the volume control is 75% or more for anything approaching higher performance levels, which does not bode well for rated distortion levels either. While these amps are 'okay' for average SPL (loudness) on desktop systems, they fall into the age old categories of, "If it sounds too go to be true, it probably is," and "There's no such thing as a bargain." Sorry but, this old boy won't be falling for anymore of these exaggerated gimmicks again.

How does V3 look like a copy of someone else's product, hahaha

Who cares what they look like??

Sent here by @cheapaudioman. Great video!