CEC (C.E.C) claim by their mostly amplifier models, it's class A (here in Germany even "Pure Class A") The name of circuit topology is "LEF (Load Effect Free). The developer is Mr. Carlos Candeias. Have a look to this URLs: Amp 3300R:
CEC AMP3300R
and Amp 5300R (Amp5300R Amp 5300R Amp5300)
CEC EUROPE WEBSITE
The last model delivers 120W/8 ohms and 135W/4 ohms, as to read in the CEC datasheet
If anybody can posted the schematic of one of both models, I will make an evaluation. I guess, the term "Pure Class A" is concerning the pre-driver stage and driver stage of a push pull complementary CFP resp. Sziklai pair, but I don't know this exactly.
If there really pure Class A by the output power devices, where is a heatsink with the appropriate sizes?
Thank you very much for your posted schematics in advance
CEC AMP3300R
and Amp 5300R (Amp5300R Amp 5300R Amp5300)
CEC EUROPE WEBSITE
The last model delivers 120W/8 ohms and 135W/4 ohms, as to read in the CEC datasheet
If anybody can posted the schematic of one of both models, I will make an evaluation. I guess, the term "Pure Class A" is concerning the pre-driver stage and driver stage of a push pull complementary CFP resp. Sziklai pair, but I don't know this exactly.
If there really pure Class A by the output power devices, where is a heatsink with the appropriate sizes?
Thank you very much for your posted schematics in advance
Power consumption (acording prospect) 65-450W, so no class A..."Ppure class A" is realy valid only for voltage amplifying stage,not for output stage, as in other "normal" amplifiers.Only marketing talks...
schematics for this CEC models still needed.
Attachments
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I have the feeling that this diagram is only available through reverse engineering of one of the modules. Not sure if they are potted or glued inside that red plastic.
The attached document, otoh, may well describe Nelson's "Stasis" output stage or any other "current dumping" topologies.
Yes. Read the statements by post #3 and #5 of our great master about
http://www.diyaudio.com/forums/pass-labs/5808-cec-amp71.html
The schematic I need (first to make a cost estimate) for prepare this amp device for connecting of a dual mono outdoor power supply.
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Are there only a very small amount of pieces of this model and other CEC LEF models in use over the world?
Their amplifiers may not as good as they say, and I feel something wrong at their claims. It is digital based that may suitable for low power and small loudspeakers.
If it is really like what they claim the best, it must be shine everywhere, but it is dark.
If it is really like what they claim the best, it must be shine everywhere, but it is dark.
I just found this guy sell CEC MP5300 for $1000 , it is $1599 at new stores. Just for black color? sometimes high end equipment just like a cellphone.
WTS: CEC AMP5300 (Pure Class A integrated amplifier, reduced price)
WTS: CEC AMP5300 (Pure Class A integrated amplifier, reduced price)
I am still looking for a detailled schematic.
about
CEC AMP 71
Mr. Carlos Candeias explain the theory of operation (scroll down).
about
CEC AMP 71
Mr. Carlos Candeias explain the theory of operation (scroll down).
Hi!
I think he is making famous gesture of Kozakiewicz YouTube - gest Kozakiewicza Moskwa 1980.AVI
PL known high jumper
after a good jump in Moscow 1980 (olimpiade)
in the direction of Russian fans.
This means: I do not show you...
😀
an other brand with LEF topology from Mr. Carlos Candeias
http://www.bmc-audio.de/en/pdf/BMC_Amp_amplification_redefined.pdf
http://www.bmc-audio.de/en/pdf/BMC_Amp_amplification_redefined.pdf
From pdf
But in the only one published test with measurement was distortion about 1,5 % near full power, so it seems, something is wrong...
The main influence of sonic character comes not from the distortion value but from the kind of distortion. 1,5% low order components is less critical than lower values of high order/complex components created by class b.
Until now most employers by test reviews don't understand this fact - unfortunately until now there are additional no THD/IM measuring line up exist, that privide results so I know, how an amp sounds without carry out an own listening test.
P.S. by post #10 about
http://www.diyaudio.com/forums/pass-labs/5808-cec-amp71.html#post3435797
there is my circuit describtion according a CEC schematic, which I have receive in the meantime. However I doubt, that it is the so called LEF topology.
Thus I am still looking for CEC's LEF schematics.
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The AMP3300R is a class A Amp that features an extremely pure Single-Ended Circuit
I have just read this description under
CEC AMP3300R
I note, that for me the English language is still very difficult, because this language uses many terms with no clear statement.
Particularly the term "single ended" in case of audio amplifiers.
The opposite term is differential amplifier stage (LTP) in case of the input (first) and VAS (second) stage
and push-pull stage in case of the output stage
What means now the term "extremely pure single-ended circuit" in case of this CEC's amplifier model and in general?
And what concerns the term "class A" by this amp model (fact is, that input stage and VAS stage runs at most cases - maybe at all audio amp models - in pure class-A)?
Thank you for advices.
I have just read this description under
CEC AMP3300R
I note, that for me the English language is still very difficult, because this language uses many terms with no clear statement.
Particularly the term "single ended" in case of audio amplifiers.
The opposite term is differential amplifier stage (LTP) in case of the input (first) and VAS (second) stage
and push-pull stage in case of the output stage
What means now the term "extremely pure single-ended circuit" in case of this CEC's amplifier model and in general?
And what concerns the term "class A" by this amp model (fact is, that input stage and VAS stage runs at most cases - maybe at all audio amp models - in pure class-A)?
Thank you for advices.
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The reliability of this models isn't good, because I know several user's with devices in not working condition.
What about the schematics in the meantime ?
Still confidential ?
BTW - sound cannot actually be good, because the residual distortion of an other model with same basic approach concerning the circuit topology looks relly not good - go to fig. 10 under
B.M.C. Audio Amplifier C1 integrated amplifier Measurements | Stereophile.com
What about the schematics in the meantime ?
Still confidential ?
BTW - sound cannot actually be good, because the residual distortion of an other model with same basic approach concerning the circuit topology looks relly not good - go to fig. 10 under
B.M.C. Audio Amplifier C1 integrated amplifier Measurements | Stereophile.com
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