La réponse de Jo red, publiée sur son facebook:
(au cas ou, je n’ai aucun lien ni avec RDH ni avec JoRed)
Greetings all,
I have been accused by Clem Rdh to rob people by selling amplifiers.
He said that my amplifiers are just SANWAY amps with my sticker glued on.
He shows picture of some older amps I sold when I didnt had the final front plate. So yes its a sticker glued on!
So here are the facts:
-These amps are build to my tight specifications
Clem RDH tries to convince people that I sell these amplifiers with Swiss quality. In no way this is true. You can’t find them on my website because its written SWISS MADE (in the website) and this applies to my preamps. These are really SWISS MADE.
I never advertised my amps as Swiss made or Swiss quality.
He claims that I rob people by selling high priced cheap Chinese amps. THIS IS NOT TRUE!
What is true : I live in Switzerland, very expensive country. I have family and kids. I give full support to all preamp and amps I sell. All my customers know that. And all this got a price but maybe too expensive for you.
Some claim by the look that they are identical to sanway. But they are not.
Compare it to a F1 race car. Some teams have the same motor but its always the A team that wins. Why?
Because of the fine tuning of the motors. And the driver of course!
Same for my amps. Its all about fine tuning. So yes they can use same components like PSU, capacitor, power transistors,… that can be found in sanway amps.
But what makes them different is the fine tuning.
Unlike in traditional class A/B/H amps where you can merely adjust the bias in my class d/t there are a lot of parameters to play with to get top notch results.
And that’s the secret. PSU and output stage have been tweaked to acheive more power and less failure.
It took me time to get there, its a steep learning curve to get from class A/B/H to Class D/T, burned several amps at workshop and in sessions, but finally I’m very happy and proud of the result.
These amplifiers are very dynamic. They don’t have that compressed sound of class a/b/h amps when reaching their limits.
Class A/B/H amps run on « low » voltage power supply. Normally 100 to 150V for the most powerfull. If 150V supply rails then the theoretical max power is 5625Wpeak and 2812wrms. In reality due to losses the final power is 2200wrms/4ohms at best.
My amps run of 200V rails which give a theoretical peak power of 10’000Wpeak / 5000wrms at 4 ohm per channel.
In reality due to losses it reaches 8800wpeak and 4400wrms at 4ohm per channel!!!
Now if we compare traditional amps to my amps what happens to a bass signal going trough?
A bass sound has a crest factor of 6 to 8. This means that the rms value of a bass sound is 6 to 8 time lower than its peak value.
Assume we play at full power.
With traditional amps max power is 2200Wrms/4400wpeak so when playing our bass sound with a crest factor of 6 that means that final output power will be 4400peak (this is still the max power of the amp) but only 733wrms (4400wp/6) of bass sound.
So when powering 2 scoops of each 1000wAES you can only play distortion free bass of 733wrms. Quite disappointing!
Now take my amps. Max power of 8800Wpeak/6 = 1466Wrms of real bass distortion free.
But the drawback is the limitation of the power supply wall socket. Most amps run on 16Amperes plug as mine. So max theoretical sustained power you can draw from a 220V 16A is 220*16 = 3250Wrms. This is the continuous power.
So how can my amplifiers sustain 4400wrms???
The trick is here : in the PSU (Power supply Unit) of the amplifier. A large amount of condenser that can store the energy and release it when needed. As we play music and not sine waves this 4400Wrms can easily be achieved. I have explained above about crest factor of music.
And as my amplifiers achieve high amount of power there are some limitations going on when reaching max power. The amplifier limit itself to not overdrive, to not make distortions. So when you keep cranking up the volume the amplifier will limit it up to a certain point. After something blows…
This limiting keeps the signal clean not like on traditional transformer based amps. There you can distort without limitations. Distortion come mainly from under powered PSU with too small transformers. The transformer saturate and this leads to sound distortion.
And this makes the bass sound seems bigger because of the harmonics induced. Some like it some not.
If you want a growling bass like shaka my lightweight amps are not for you. They dont distort.
If you want clean power then its for you.
And as you Clem RDH dont know nothing about these technology you accuse me simply by the look of the amps. But you never saw one from near!!! You only guessing from picture but don’t have a clue how they working.
I also got accused by Jah Garden ( another guy from france) on the red lion dub forum saying the same things without even knowing what he is talking about!
It is a good thing that ridicule never killed anyone, because facebook would have lost great investigation journalist. Lol.
Come on did you got raised by your mother but not educated?
PS: Clem RDH what about the LINKS preamp picture you did take from my website and now you use it as your group banner? Did you ask for it? Or you’re just a pirate?
And just to let people know. I have helped you to design your preamp. I won’t get caught twice helping you!
And last sorry it took so long to reply to these serious accusations but does who know me knows I’m overbusy. But it had to be done for the sake of my faithful customers who have been induced in error by wicked people.
Thanks to all my faithful customers who have faith in what I build and sell.