glt
I do not work for ICEpower so it is not in my interest to enforce their patents. As many others in this forum, I was just bringing forward information which is openly available. I am not the judge of this matter so what I say has little importance in practice but AP2 can use my information to either modify his topology or something else.
AP2
I fully agree with you, many patent applications should not be approved. But in the case of HCOM they have actually been quite specific.
I do not work for ICEpower so it is not in my interest to enforce their patents. As many others in this forum, I was just bringing forward information which is openly available. I am not the judge of this matter so what I say has little importance in practice but AP2 can use my information to either modify his topology or something else.
AP2
I fully agree with you, many patent applications should not be approved. But in the case of HCOM they have actually been quite specific.
TO PABO.
Hi, since I am not responsible for AudioPower and you have warned me in public forums, I have informed the legal representative of Audiopower.
just that you know well the patent. you know that you can patent the "method" not the "result". then I think your purpose was different to talk about the forum (topic is sensitive and serious).
AudioPower has the correct ways to defend themselves.
Regards
Hi, since I am not responsible for AudioPower and you have warned me in public forums, I have informed the legal representative of Audiopower.
just that you know well the patent. you know that you can patent the "method" not the "result". then I think your purpose was different to talk about the forum (topic is sensitive and serious).
AudioPower has the correct ways to defend themselves.
Regards
Hi,
other attacks will come in time.
This is expected, everyone wants to sell ,no matter.... what🙂
other attacks will come in time.
This is expected, everyone wants to sell ,no matter.... what🙂
AP2
I actually think that you avoid them by using a ring modulator. Their claim only mentions subtraction in the error amplifier, not multiplication. I am a little embarrased right now, I am sorry if I caused you trouble. 😱
I am looking forward to getting one of your amps in my hand some day, it will be interesting to see how you have designed it.
BTW, is it possible for you to show how it behaves when it clips without load? This is the most difficult state for any class d amp with feedback.
I actually think that you avoid them by using a ring modulator. Their claim only mentions subtraction in the error amplifier, not multiplication. I am a little embarrased right now, I am sorry if I caused you trouble. 😱
I am looking forward to getting one of your amps in my hand some day, it will be interesting to see how you have designed it.
BTW, is it possible for you to show how it behaves when it clips without load? This is the most difficult state for any class d amp with feedback.
hi,
it is normal that you saw the second feedback and think that is attached as "B & O" but you have not asked the question correctly. your like a prosecution. this is a very sensitive subject.
ok, short put the measure you asked me.🙂
Regards
AP2,
I don't want to be involved in this patent discussion, but one thing you must learn from a business point of you is to not attack a competitor, especially when it's one of the leader, when he has respectable background history, and when he has deep pockets.
You are a new company, nobody knows you, but if you start acting like that, sure that B&O lawyers or sales team will ruin you before you can make a single penny of your R&D investment.
Finally, it's always better to concentrate yourself in promoting your product than slashing the competition, otherwise you will be soon perceived as the angry man and it will bring you nowhere...
My humble 2cents
Arthur
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Hi,
certainly owe an apology for my behavior, not my style trample others to bring up our products.
Pabo perhaps did not realize what he said insistently.
however "Mediocre" is not "very poor". add that the products are not only very good because I spend so much money on promotion and marketing and papers full of formulas and equations. customers know amplifiers even if they say nothing...
Do not try to intimidate me, MDI develops for many companies since 2002, even in very different fields. AudioPower is branded with the mark and produces some products for audio only.
Regards
At this point I assume that I must apologize also Bruno Putzeys (UCD) because I said "obsolete". but this word is output by the translator (I wrote "not new")
A chaos for null, thank Pabo.
Regards
A chaos for null, thank Pabo.
Regards
OK, back on topic please.Hi AP2,
I know UCD because i use them since many years. And now I'd like to try your amplifiers to make my own point of view. Could you tell me if your amplifiers and power supplies are availables? in stock if I order from your webshop?
Franck
I know UCD because i use them since many years. And now I'd like to try your amplifiers to make my own point of view. Could you tell me if your amplifiers and power supplies are availables? in stock if I order from your webshop?
Franck
Hi Fram,
thanks for your attention, I beg to refer directly to AudioPower,please.
I have interest to release info (if interesting) on a new product because I believe that clarity is a right to customers.
all these "attacks" me tired.
Sorry, you do not got to do this.
regards
I understand, without an explanation of the new MXD, this measure makes no sense.
FB2 (I call this Erroneous) It Is Necessary inform the MXD-on component audio output.
This Is Not intend as normal feedback, not patched on signal.
amplifier behaves very differently because it is different.
Regards
FB2 (I call this Erroneous) It Is Necessary inform the MXD-on component audio output.
This Is Not intend as normal feedback, not patched on signal.
amplifier behaves very differently because it is different.
Regards
AP2
The amplifier is still switching when it is clipping. Of course this is a simple way to avoid frequency drop into sub harmonic oscillation but you loose a lot of efficiency and you also loose voltage head room which might require you to select higher voltage graded components. There are several makers on the market that limit the modulation depth to around 90% to keep the outer loop stable so this does not say much about your actual modulator. I would like to see the amplifier going into "real" clipping where it stops switching. Is this possible without too much hassle?
The amplifier is still switching when it is clipping. Of course this is a simple way to avoid frequency drop into sub harmonic oscillation but you loose a lot of efficiency and you also loose voltage head room which might require you to select higher voltage graded components. There are several makers on the market that limit the modulation depth to around 90% to keep the outer loop stable so this does not say much about your actual modulator. I would like to see the amplifier going into "real" clipping where it stops switching. Is this possible without too much hassle?
Hi,
The problem is that you want to see what there is in this amp.
modulator has no limiter because it is a dirty solution, you can not keep the distance between rails and vcc treshold(it is variable), then would lose much efficiency.
I now have a probe connected to + Vcc, PSU is now + /-68V.
where is the loss? No-Load With APC disable, this is the maximum modulation. switching frequency not stopped. I can not explain what is in MXD.
remains the fact that DXA-400 has an incredible linearity (see thd vs.frequency and vs.power)
Also is indestructible. thd not at full power, 110dB SN with 60 KHz of bandswitch... is enough?
N.B. This condition is not normal because i have switch-off APC on modulator.
Regards
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AP2,
Do your amp has an active limiter ? if yes, is it opto or VCA and what is the maximum input level allowed before preamp clipping ?
Do your amp has an active limiter ? if yes, is it opto or VCA and what is the maximum input level allowed before preamp clipping ?
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