Fosi v3 Mono - User Impressions | Owner's Thread

[SMen]

Lol…. Trying a user impression thread not to be converted into opamp war zone

Yup! And you indeed started this thread. My small point along with @GGroch is that these monos do allow a means to dispel or otherwise a myth.

When everyone starts actually receiving these darn things we might get some proper user impressions! Although how to avoid some forays into the mildly subjective I am not so sure! At least the mono test described might be an interesting slant. I might get round to it come August / September!

 

[SMen]

This is the funniest shit i've seen this year

View attachment 376153

I have to admit, something like this from a manufacturer, with absolutely no basis for how these 'results' were obtained, is pretty ridiculous.

 

[GoDawgs]

When everyone starts actually receiving these darn things we might get some proper user impressions!

I'm going to test mine and post a chart with stuff like "Soundstage", "Clarity", "Warmth", etc.

 

[SMen]

I'm going to test mine and post a chart with stuff like "Soundstage", "Clarity", "Warmth", etc.

and don't forget "darkness"!

I'm going to compare with another unit I have where I changed the power supply and put in a pair of Muses 01s (I was provoked is my excuse),
and try to do as controlled a listening test as I can. So I will try those 02's in one, vs the NE5532 in another.

But like I said ... this might actually require a period of extreme boredom between now and Christmas!

It is impossible with a single stereo unit to do a blind A/B test as per Amir's video guideline. I'll be happy to hear no difference but try this with the monos.

 

[Electric_Haggis]

Best if you remain convinced of that and don't try the comparison

How do you think they'd honestly compare to an F3?
(Rather well, I suspect)

PREVIOUS POST:
Just saying...
I ended up buying a pair of 2nd hand Marantz MA6100 monoblocks, plus an Integra DTR 7.8 to try out dual-monopole mode with my PSB Imagine Surround S bipoles

We won't be able to press them into service until the room is finished in a couple of months.

I suspect both units would easily beat the F3... Thoughts?

 

[gwing]

How do you think they'd honestly compare to an F3?
(Rather well, I suspect)

PREVIOUS POST:
Just saying...
I ended up buying a pair of 2nd hand Marantz MA6100 monoblocks, plus an Integra DTR 7.8 to try out dual-monopole mode with my PSB Imagine Surround S bipoles

We won't be able to press them into service until the room is finished in a couple of months.

I suspect both units would easily beat the F3... Thoughts?

As you press for an answer I'll somewhat reluctantly expand as my intention isn't to spoil your pleasure.

If you listen to your system with the Marantz amps and the same with the Fosi monos I'm sure you will prefer the Marantz amps you have bought and it is probably best to stop testing and enjoy them at that point.

However if you do a genuine blind listening test between the two at carefully matched output levels within the amplifiers power level capability I would think it unlikely that you would be able to reliably tell which was which. That said I don't know your speakers characteristics nor any peculiarities your listening room may have so nothing is certain, one might in practice be distinguishable from the other but both are sufficiently good that in normal listening conditions distinguishing between them is likely to be beyond the capability of the normal human ear.

 

[Electric_Haggis]

As you press for an answer I'll somewhat reluctantly expand as my intention isn't to spoil your pleasure.

If you listen to your system with the Marantz amps and the same with the Fosi monos I'm sure you will prefer the Marantz amps you have bought and it is probably best to stop testing and enjoy them at that point.

However if you do a genuine blind listening test between the two at carefully matched output levels within the amplifiers power level capability I would think it unlikely that you would be able to reliably tell which was which. That said I don't know your speakers characteristics nor any peculiarities your listening room may have so nothing is certain, one might in practice be distinguishable from the other but both are sufficiently good that in normal listening conditions distinguishing between them is likely to be beyond the capability of the normal human ear.

Noted. Thank you for your robust reply!

 

[antcollinet]

This is the funniest shit i've seen this year

View attachment 376153

Oh dear God!!!

 

[gwing]

Oh dear God!!!

Doesn't help does it? Just can't make my mind up between the Vivid and Classic options from that chart.

 

[joostdh]

Doesn't help does it? Just can't make my mind up between the Vivid and Classic options from that chart.

At leat it is obviously you wouldn’t want the v5i as that has exactly half as much detail as the V7 Vivid and half the colour and texture of the V7 Dynamic. Must sound horrible I guess. On the other hand it is 150% more transparent than the NE5532.

 

[waboni]

Wrong, there is benefits from different opamp since the are built different, with different voltage and different noise rate.
I been rolling opamps for 3 years now and depends on your equipment some sounds better in some amplifier with tpa3255 and some make little improvement. Like for Aiyima07 Max the Muses02 is better and for Fosi V3 stereo sparkos lab ss3602, same go for geshelli akm4499 sparkos ss3602 is superior than Muses02, lme49860, opa2604, opa1656 and opa1692

It would be interesting to carry this same review taking the proper measurements and then comparing. May be a nice exercise, trying to determine if something that sounds "better" for a trained ear also may correspond to a variation in for instance THD+N, SINAD, or distortion numbers using the right equipment.

Then we will have science-based subjective appreciations.

 

[antcollinet]

Then we will have science-based subjective appreciations.

Only if the subjective appreciations are conducted blind and controlled.

 

[EddNog]

The V3 Mono review thread has stolen all the dramatic flair from this thread. Can’t have that, it’s too loud in that room and not loud enough in this one. So to resolve this I will present this and say nothing at all:

-Ed

EDIT: For clarification purposes, because it seems multiple people don’t realize it, this picture was taken prior to closing the entire amp back up. It is being operated in the normal manner:

 

[MCH]

View attachment 376543

-Ed

Don't these connectors keep the bypass capacitors too far away? (It is a question)

 

[Guddu]

How are you going to use it, as it is?
Probably cut whole on upper case plate for opamps.
These opamps are more expensive than the amp itself, they deserve the case more than anything else there

 

[joostdh]

I will present this

I think the holes in the housing are to route the wires of your opamps through

 

[EddNog]

Don't these connectors keep the bypass capacitors too far away? (It is a question)

Maybe I am misreading this question, but the adapters allow me to fit tall op-amps despite the small casing and no other component needs to be moved/adjusted/bent.

-Ed

 

[EddNog]

How are you going to use it, as it is?
Probably cut whole on upper case plate for opamps.
These opamps are more expensive than the amp itself, they deserve the case more than anything else there

No, I am able to close the case entirely with these adapters. In fact I am listening to it right now this way. If you saw the amp right now, you’d have no idea that anything is modified at all.

-Ed

 

[Guddu]

No, I am able to close the case entirely with these adapters. In fact I am listening to it right now this way. If you saw the amp right now, you’d have no idea that anything is modified at all.

-Ed

That’s really cool, pls add the product link for the adapter you are using if that’s not a problem.

 

[EddNog]

That’s really cool, pls add the product link for the adapter you are using if that’s not a problem.

I don’t mind linking it as long as nobody else minds me doing that. And if the authorities frown on it, I’d be more than happy to accept a post deletion:

https://a.aliexpress.com/_mPH16g8

-Ed