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Jul 17, 2025
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Been seeing many Fosi Audio video's lately. Anyone have experience on them? I am in specific looking at the "Valve" amplifier MC331. I have always felt there is just "Something" about Amps with Valves. The one video I watched (Added below for reference) at around 7:03 they have the unit open. I do not see any "Dump" capacitors. So as an added question to this, does the "Valves" replace the "Dump" capacitors, or do you still need to add the "Dump" after your output if needed?

So short history on this. One of my students will be doing his finals in November. He will be dabbling in EDM's (I do not understand why he studied music arrangement all these years and then go into EDM's, but his choice).

I do have an extra FL (Fruit loops Studio) Licence (I never got the hang of FL so kept to Cubase) and figured an FL license with maybe a small little Amplifier to get his career going. Professional equipment is too expensive and he will eventually have to get that for himself, but just something to get him started. Any other "Valve" amplifiers (Non-professional) as suggestions would also be great since all I could find in searches was Fosi audio.


View: https://www.youtube.com/watch?v=YMf0puWTHMM
 
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as per google AI

The Fosi Audio MC331 is a hybrid tube amplifier that does not use a dump capacitor in the traditional sense. Instead, it utilizes a power supply with a filter capacitor, which is a common component in audio amplifiers to smooth out the power delivery.

The MC331 features a 24V/4.5A power supply. While not a "dump capacitor" in the automotive audio context, this capacitor plays a crucial role in providing stable power for the amplifier's operation[

This sort of question probably best asked on somewhere like

they did review it after all
or

 
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Jan 15, 2020
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Been seeing many Fosi Audio video's lately. Anyone have experience on them? I am in specific looking at the "Valve" amplifier MC331. I have always felt there is just "Something" about Amps with Valves. The one video I watched (Added below for reference) at around 7:03 they have the unit open. I do not see any "Dump" capacitors. So as an added question to this, does the "Valves" replace the "Dump" capacitors, or do you still need to add the "Dump" after your output if needed?

So short history on this. One of my students will be doing his finals in November. He will be dabbling in EDM's (I do not understand why he studied music arrangement all these years and then go into EDM's, but his choice).

I do have an extra FL (Fruit loops Studio) Licence (I never got the hang of FL so kept to Cubase) and figured an FL license with maybe a small little Amplifier to get his career going. Professional equipment is too expensive and he will eventually have to get that for himself, but just something to get him started. Any other "Valve" amplifiers (Non-professional) as suggestions would also be great since all I could find in searches was Fosi audio.


View: https://www.youtube.com/watch?v=YMf0puWTHMM
What will he be driving with it? In general tubes introduce distortion which can be pleasing with certain audio types like jazz and other vocal centric styles.. If he's focused on EDM and electronica he'd probably be better off with a good solid state amp before something with tubes. You don't really want any distortion with electronica.
 
Jul 17, 2025
131
185
270
What will he be driving with it? In general tubes introduce distortion which can be pleasing with certain audio types like jazz and other vocal centric styles.. If he's focused on EDM and electronica he'd probably be better off with a good solid state amp before something with tubes. You don't really want any distortion with electronica.
No he will not driving with it. Will be for a start-up home studio
 
Jan 15, 2020
62
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10,570
It's well rated but you'd need to factor in the speakers or headphones he's using to see if tubes are appropriate. And again for electronica and EDM you really don't want any distortion so just for the genre I wouldn't do it.

Now if he also likes more vocal focused stuff and other types of music as well then he may very well love it. If I got it as a gift I'd be very happy.
 
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