It seems your ears are plagued by Powersoft and its chinese copies of class-d amps which lack the heavy weight punch of linear amps😀
Yes, I am now in Kudus.
No, not Polytron, nor Profotex, nor SMC, but starting new party. I'm not entering the market yet. I'm still 27, too early, we need to waiting this free global market take the effect 1st. For now, we just working privately for ourself, and indonesia only. Also a bunch of demand already make us impossible to enter the market.
I just now taking some rest and joining here, looking and sharing something useful.😀
Don't worry, I will not give my amp copy to chinese.😀 but they did great anyway. Very fast starting beating here and there. Including my country.
My ears still OK. I am now living in a low noise place, far from engine noises and very quiet at night. Near the big mountain, I love it, it is not every audio designer has, some of them already need huge power to hear something, may be some inner sensor broken because of hearing very loud noise frequently, beware, your ears are precious, and loud noises may dangerous to them.
There an issue about 1.2Gigawatts out there, do not make amps like this, it is disaster.
Currently I am limiting all my amps to only 500watts, because the past I ever designed and built some 1KWatts rated, and some day I realized what happening to the neighbor of loud amp home playing, not using my amps, but I am thinking if that house just using one of my amp, then I have responsible of that neighbor disturbing amp.
Easy?
LUKA.
Workhorse design, is Hardworked
If you cant make your own CLASS D amplifier, its better not to give comments.
Also this CLASS-D is not a 400W SMPS like yours.
Got it?
LUKA.
Workhorse design, is Hardworked
If you cant make your own CLASS D amplifier, its better not to give comments.
Also this CLASS-D is not a 400W SMPS like yours.
Got it?
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No worry, there are ways to do that if you prevent floating rails from high dv/dt.
Common-mode coil might help though along with tightly coupled layout of both rails and RC snubbing.
Simple thinking exercise:
Take two full bridge amplifier channels with floating power supplies. Couple input signals with transformers to make them floating too. Join the - output of one channel with the + output of the other. Connect speaker to the other remaining + and - outputs.
Where is the high dv/dt problem? I don't see any, at least if carrier residual is clean without ringing or glitches.
Take two full bridge amplifier channels with floating power supplies. Couple input signals with transformers to make them floating too. Join the - output of one channel with the + output of the other. Connect speaker to the other remaining + and - outputs.
Where is the high dv/dt problem? I don't see any, at least if carrier residual is clean without ringing or glitches.
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Only stupid manufacturer not caring their customer safety. Which amp with 3600W into 4ohm?
😀Hi, Workshoe,
She is writing at female language that we couldn't understand. You need dictionary, .may be.
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No need input transformer. Both amp are floating. Only maintain the level shifter.
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Now I understand why mamouth chinese amps beat them that way, because they very dangerous🙄.
May be only japanese using standarized line, 30, 50, 70, and 100. and yamaha still using 70Vline. Here in my country, some toa V1000 series rarely 100Vline used.
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...I am wondering about the 100V rule...
I am aware of low voltage regulations, which allow max. 42V/AC or 60V/DC for touchable parts.
Even one newer SELV-specialty, which would allow up to 120V/DC for floating circuits but only one node touchable.
But, I never heard about 100V/AC allowed to touch - not in the UL-world and also not in the IEC-world. To which standardisation-world does Java belong?
No matter which safety standard you are refering to:
I am not aware of a general banning of amps with higher voltages, but IMHO it has to be ensured by construction that the speaker connectors and wires meet the requirements of reinforced isolation. The same with the speaker / speaker box, which will be used with such an amp. Last but not least, I would guess that also the touchable input side has to meet the requirements of reinforced isolation vs. the high voltage parts of the amp.
Means:
At high voltages one has to consider proper isolation systems - which is obviously not fullfilled by the traditional HiFi set up.
I am aware of low voltage regulations, which allow max. 42V/AC or 60V/DC for touchable parts.
Even one newer SELV-specialty, which would allow up to 120V/DC for floating circuits but only one node touchable.
But, I never heard about 100V/AC allowed to touch - not in the UL-world and also not in the IEC-world. To which standardisation-world does Java belong?
No matter which safety standard you are refering to:
I am not aware of a general banning of amps with higher voltages, but IMHO it has to be ensured by construction that the speaker connectors and wires meet the requirements of reinforced isolation. The same with the speaker / speaker box, which will be used with such an amp. Last but not least, I would guess that also the touchable input side has to meet the requirements of reinforced isolation vs. the high voltage parts of the amp.
Means:
At high voltages one has to consider proper isolation systems - which is obviously not fullfilled by the traditional HiFi set up.
I don't think so, I am not JIS member. I just found that crown using 70Vline too, and crown isn't japanese as i know. Probably it is not from JIS.
Here only TOA has engineer, I don't know about your country. Just ask them where this standard coming from and why only 100V maximum.
crown com-tech series, ct1610, ct210, ct410, ct810, ct-1610, ct-210, ct-410, ct-810
Here only TOA has engineer, I don't know about your country. Just ask them where this standard coming from and why only 100V maximum.
crown com-tech series, ct1610, ct210, ct410, ct810, ct-1610, ct-210, ct-410, ct-810