Has the King Returned? FOSI v3 Mono Review

FOSI v3 Mono Review - Class D amplifier

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Timeline
00:00 Intro
00:45 A Look at the FOSI v3 Mono
04:00 Listening
09:50 Rating
10:40 Conclusion

[scotsirish]

Excellent, informative video, well played SA, you cracked on and got it sorted 🖖

[audiolife]

Amazing thumbnail! Irresistable. A must click!

[jimf]

thanks...very useful..I look forward to when Fosi gets something that will drive a 4 ohm speaker at reasonable listening volumes with good dynamics. I like the Fosi ZD3 Dac I have.

[carminedesanto]

GM ☕️…you’re a tough but fair reviewer…
We’re all looking for that unicorn 🦄.

[bazzaah]

These ran my Trigon Energy quite close. In the end I prefer the Trigon's texture and smoothness, but I'd be very happy if i only had the Fosi V3 monos. Nice review!

[jozefserf]

Not only the best reviewer but the best audio channel on YouTube.

SA makes the competition look pedestrian, dishonest or 1 dimensional. Or a combination of all 3.

Can SA maintain this supreme standard of excellence? Can anyone?

[nunyabidness]

I think you're entertaining and informative. I really appreciate the work you've done for us poor folks. I'm sorry that people are so cruel and immature. It's like kindergarten again but without the naps and lice checks

[ryanchappell]

A preamp can and often does provide some gain, sometimes a lot of gain. The Yamaha most likely has a preamp that adds lots of gain. Most of those preamps are very expensive though.

Most likely someone would use a DAC or streamer that has a higher voltage output.

Fosi should make a preamp for this based on the ne5532 instead of those rediculous tubes. That way they can keep their precious sinad on the amp itself with a low gain.

[ThePierodifelice]

Good evening: accordingly to your experience do u thing fosi v3 mono beat a cheap Yamaha like As 201? TKS

[Roddy]

Another "Origami-Bonsai" amplifier... uh, pair... What rating would Helmholtz give to these things? Chunky Light Tuna or Meow Mix?

Seriously, thank you for the fair review. You are very kind to the "Origami-Bonsai" class D amplifiers. Some reviewers say they were blown away by the amazing sound and power, while others say they are weak. That keeps me from spending my money on them. I see them as a small office/desk category, so they have a market.

[HotSause]

Would love for you to venture into King of Amps territory. I'm eagerly anticipating and I think a lot of your subs would be extremely interested too.

[manitsony]

Thanks for this video..do U think with the noised psu if it was working well would it give more spl?? Assuming using one 10a psu for each speaker..then at this price point is it better to go Yamaha?? Cheap Mono blocks vs used Yamaha what would you recommend. Thanks

Oh used ab amps around $150 is a better choice?

[KXP]

My V3 monos get very loud on my inefficient speakers as I'm using a proper preamp that can actually feed them the needed voltage.

[invisiblekid]

Connected these to my Burson Soloist 3X GT balanced which I THINK is 5V or 6V and on high gain they are loud. But yes they do need that high input.

[jimfarrell]

I'm waiting for mine to arrive, so I can use my Allnic Audio 300b amp and a vintage Sansui Au 7700 as preamps. I look forward to seeing what these amps can do when fed a high end signal. A Kinki EX M1 integrated with 215 watts per side into 8 ohm will provide a comparison.
It's a great time to be an audiophile whether young and hungry or ancient and comfortable.

[RemontKvartir]

привет, а как вы относитесь к готовым колонкам типа harman onyx studio 7 ? там же тоже стоят усилители d-класса и предварительный dsp?

[onlyhumblehuman]

Great and very important video. Now we know that this Fosi power amp is inadequate for most receivers and amplifiers with preout because most of them output 1, 5 - 2v on preout and Fosi demands 4, 4V. This way it is unsuitable for most setups.

[Daniel]

Looking to drive some bookshelf speakers on desktop for near field listening. Got any suggestions?
Seems this is a Fosi v3 mono is a good option to drive them. If you agree, which power supply would you recommend?

[ryanbuck]

Currently playing vinyl through a mid level 2000s Onkyo AVR in Direct mode through Advent Maestros. Would these be a step up if I used a refurb’ed Kenwood KA-5002 as a preamp?

[Eron]

SA. If you had 2 of these v3 Mono's and a Emotive A2M laying around to a pair of Lintons.. What would you use?