Too Hot to Handle! Fosi v3 Mono 

I generally listen to at least 600 hours of Diane Bish before watching any Scientific Audiophile reviews to calibrate my hearing. As usual, my hearing is always perfect and I don't need to change a thing. Unlike normal non-audiophile listeners, my hearing is completely unaffected by emotional, environmental, and physical issues. Everything I hear goes straight to my highly analytical conscious mind, which is why I am such a good person to ask for opinions. I'm completely objective about everything, especially audio. In fact, I have no imagination whatsoever, so it's impossible for me to make mistakes when it comes to listening.

I really don't need these, but I know on release day the early bird discounts will be hard to resist, and I have minimal will power. Also these will come in a small box, and I can believably pass them off to my wife as a years supply of vitamins.

2:05 "... the stupidity of my mom ..." "Parents aren't like they use to be when I was growing up." There we go, throwing the parents under the bus again, lol.

Gentlemen, I have 2 48 volt 5a like fois audio za3 amplifiers and I connected these amplifiers monoblock, and the muses01,muses02,muses03 opamps play very nicely, and my audio source is my computer with an ASUS X99 DELUXE ll motherboard, and the speaker is Monitor Audio Silver 100 (7G) As a musical style, I listen to rock, blues, pop, latin pop and I'm currently continuing with muses03s. By the way, I buy all my opamps from the original MOUSER and DIGIKEY, and in addition to these, I also bought the original TPA3255DDVR amplifier chips, but I have not changed them yet, but the ones on the amplifier seem to be original, so I am not in a hurry to change them.

Must admit I bought a Fosi ZA3 to experience what they were talking about. Didn't expect it to surpass my Rega Aethos, but must admit that with lightly driven vintages like the Beovox 1100 or 2200, system matching makes the ZA3 surpass here. Looking forward to hearing the Lowther Bicor 1000 and Zu Audio Cube MKii at class d... With that in mind, I'll have to try the mono V3, with the Aethos as a preamplifier... Work, Consum, Die;)

Awww, yes! Starting the day off right with SA!

I just posted my review and also had a noisy power supply like yours. I pulled two PS from other amps and the noise went away.

I was going ro use the za3 as a mono block to run my Polk 12 inch 2 ohm Sub. Now thinking about V3 mono for that and using ZA3 for stereo tops. two amps for 2.1 portable system. Thanks Amir for keeps cool looking jackets alive and well. Maybe there is hope for us after all

Nothing like lunch a beer and Chris!

You’re the most refreshing reviewer since Greg Weaver😳😂.

Please tell us, why these amps are not for Wharfedale Linton users!

Dear SA for the rest of the world, celsius please!

Interesting insights, but clearly i'm missing some context as I didn't fully get your comment about the Lintons. Can you expand on that, what would be the concerns with pairing the Fosi v3 monos with the lintons?

Man you are hilarious, enjoy your videos ….you some how made a video about a product you haven’t listened to informative and entertaining..even had some audiophile community drama jokes for fun 😂. Look fwd to video when you get to and running.

The heat dissipation design makes the whole chassis into a radiator, which means the surface temperature may seem a bit high. I think that indicates the heat from the TPA3255 amplifier chip is being effectively transferred to the chassis.

Heat is always going to be a problem with these fully enclosed amplifiers ... even with the fancy little holes on the side. But in fairness running these amps at 3/4 output on noise for hours on end is not a typical operating scenario... it's bench level torture. Most of the time while listening at reasonable levels (75 to 80db spl) you will be asking these little amps for about 2 or 3 watts of power with very short term peaks hitting not much more than 15 or 20 watts. In the normal listening scenario they will not get anywhere near as hot as they did in the noise tests. Probably about 80f or 27c in a comfortable room. Yes, heat is a problem ... but lets not exaggerate it all out of proportion. As always, I recommend that, in these enclosed cases, with smallish heat sinks, you should use no more than 36 volt supplies... so for dual mono, you want 2 x 36 volt 5 amp supplies. That will give you about 75 watts on 8 ohms and 130 on 4. ... more than enough for most scenarios.

The lower power supply 36v version is plenty of power and better noise. Lower heat.

It is good to see that you have sacked that sh*t lighting crew, well done.

Parents aren't like they used to be when I was growing up. Everything used to be better!

waiting for your hoenst review of Fosi v3 Mono with a better power supply ;-)

If your going to get a class d amp,stop playing with these baby amps,get a crown 👑

Hi. I enjoyed your review, but I still don't understand your comment about the monos not being reccomended for the Lintons. The video link you refered us to goes to your criticisms of the Darko Linton review. I have watched that video twice and cannot find what you are referring to. The link comes up as you mention that the v3 monos can handle reactive loads, and then you state they won't work for the Lintons. Please elaborate further as I must be missing the obvious. If you won't elaborate, I'll have to contact Diane Bish directly!! :)

Hello, I really like your videos. You would test pa7 topping. I'm wondering whether to buy topping or Yamaha A-S701. What do you think?

Is there an echo in that room? I think you have a bit of a slapback echo going. Just little more and you'd sound like Elvis

please roasting the Topping dx1 cuz many reviewers recommended that thing 😂

Are you guys talking about organ music? 600 hours? I prefer to switch genres, rock, metal, modern jazz, duke ellington, blues. If the recording is good,that’s where the magic happens. I have wiim pro streamer into a geshelli j2 dac with sparkos op amps into a fosi tube preamp with Mullard tubes into a fosi za3 with sparkos op amps into elac unifi 5.2. Huge soundstage! Shocks and amazes my friends! lol…and… I prefer my amps HOT!

Nice Fosi commercial. #getpaid #fosicommercial

Algorithm... Yamaha sound or Denon sound?

I love how Americans don’t know most of the world uses Celsius. I’m certainly not going to tell them.

I knew it. Its always dad's fault.

How do I get a scientific audiophile lapel pin?

Can those be used with the Wiim Pro Plus or will it require a pre amp for volume control?

Wait.. Why is this not for Linton users?

Sorry noob here, appreciate it if you could explain why you said that they wouldn't pair well with the wharfedale lintons?

Your next upgrade: get a better 100% agave tequila like Cabo reposado. Jose Cuervo (aka Joe Crow) will make you mean like Erin or Amir.

SA, how hot does your reference amplifier get with a 4 hour stress test? You HAVE done that stress test on your reference amplifier haven't you??!!?? Andrew Robinson is watching whilst sounding like a transcendental meditation tape narrator.

Should I buy this on kickstarter or just wait? 100$ to ship?! Surely this will be a better deal on Ali Express.

Would you still say the Outlaw Audio 2220 is superior? How's the bass of the V3 Monos with the 48V/10A power supply? Is it lean like some have said of the V3, ZA3 and other Chi-fi mini amps? A slight noise issue isn't a problem for me as I listen to a lot of heavy metal and rock but just out of curiousity, would using a power conditioner do anything to reduce noise?

I will only raise the noise floor and that's about is mate-E

Use low gain setting with 4ohm speakers

Can you compare with Aiyima07 Max on mono?

Did I write that music ?

Why would it get hotter than a V3 stereo with the same chip?

Is listening to white noise like going to a WhiteSnake concert?

Can you swap out the opamp?

Eric Alexander 😂

Mr Alexander relishes shout outs of his name by You Tube reviewers so much that rumour has it he loses so much sleep each time luxuriating in the adulation that he doesn’t care.fully watch the entire video to parse the context. Of course, after reflection his response is to speed dial his army of dime store litigators to initiate cease and desist orders.

Sorry have to go, need to catch up on Anglia Railways - Anglia's first privatised Intercity Operator! | Failed Franchises. You take know, bye

I’m no audio technician. But I do have a basic grounding in the sciences, particularly maths and physics. A 5 amp 48 volt power supply can only output 240 watts. So, in order for that thing to manifest 240 watts into 4 ohms, it has to be 100% efficient. Class D amplification is known for being ultra efficient, at least compared to class A or Ab. But 100% efficient, never. Anyways, you described the amp as running hot. Inefficiency, equals heat. Enough said. So now that we’ve unquestionably established that the unit doesn’t live up to the manufacturer’s claims, I’ll be keen to watch your full review, once you’ve been supplied with a non defective power supply. In the world of die hard audiophiles, isn’t separate power supplies with monoblocks a key selling point, or marketing ploy? So, is not a 10 amp shared power supply, a step backwards?

oh grow up ...my bi-wire speaker cables weigh more than than the amp...poor design,,,they would be too hot too handle if these class D amps can be tweaked to sound like Class A or really fat sounding tube smp...have Elon Musk take a look at it and make it a reality

First of all, it is an absolute SHOCK that you would find anything wrong with an amplifier company whose products are famous for big orange knobs that maych the color of your suit....Or is it suits, as in duplicates? Fosi...that sounds like a cartoon bear's name. As reported on the news, the bear species has evolved into one that has figured out how to open car doors. It is a BIG MISTAKE to leave a giant jar full of HONEY visibly inside your car. It could even be a bad mistake to leave your keys in the ignition. If they can figure out how to open a car door, who's to say they wouldn't be able to figure out how to turn the ignition key and put their clawed feet on the gas pedal? Real bears, like real amplifiers, can be very different in real life. Orphans, along with certain children who are particularly unlikeable, have the comfort of knowing that even if the whole world seems against them, there are always The Care Bears; who care about them. Although now there's also Drew Carey of the game show The Price Is Right, who at the end of every show, says "I love each and every one of you." So there's two now! Two entities that care about everyone. Drew Carey's last name even has the word "Care" in it, followed by the solitary letter Y. The Care Bears and Drew Carey also care about Diane Bish, so it's not just you that cares about her. Bob Barker for many decades, was the host of The Price Is Right, preceeding Carey. At the end of each show, Barker said something slightly different than "I love you all." He said "Make sure your pets are spayed and neutered." Unless he he meant to look at their undersides to see if they are! He really meant "cut their you know what off." What a terrible thing to do to any being " To take away arguably the most fun thing on the body. And he made it seem so trivial. Like Trivial Pursuit; with suddenly no motivation anymore to pursue another animal of the opposite gender. Neutering is more than just trivial. Don't you as a potential pet owner...Don't you think that NOT neutering, should at least be given some thought? Your pets I'm sure will really appreciate it. Much more than petting them on the head. Your previous Fosi product review read FOSI NEUTERED. An extreme coincidence. But anyway, is controlling the pet population really that big of a problem? When was the last time you saw a stray dog? It's a very rare occurrence. And if you did, when was the last time you saw a stray dog without a collar? I don't know if I ever have. I have always wanted to try dual mono amplifiers. If anything should be neutered, maybe it should be Bears, who have learned how to conveniently open the doors of cars. How far away can it be for Bears driving away in them?

More bogus crap.