Invitation to Analists, Engineers, Experts, theoretical, Critics, Evaluators

[destroyer X]

and addicted to Class H, to analise, to criticise, to explain forum how this works (supply and Class H switching mode)...to discover the real continuous power it can put out, the real specifications about peak power and other details you may feel good to discuss.

So, it is a thread, where you have invitation to discuss, to argue, to create and dissolve controversy.

I could understand something about this amplifier...i have some doubts..for me your discussion will be a chance to learn some...also i think the specifications are fake..observe the home page and check the power ratings.... seems too much inflated in my point of view..exagerated and not continuous RMS power the way we usually understand as good ratings..fair ratings.. decent ratings.

The factory has some fame in my country.... but people use to say that during shows the protection enters from time to time..overheat protection...others protections exists..short in the output...open output...radio frequency in the output.

Supply switching from class AB to class H...the second supply entering, seems interesting... the circuit, double differential seems common, regular, very standard..the V/I limiter too,

Better schematic is in pdf..just let me know your adress and i will upload to you (3.7 Megabytes size)

Analisis, in portuguese, can be uploaded too....pdf, 300K size.

The Studio R link is this one:

Studio R Professional Audio

regards,

Carlos



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[destroyer X]

attached,

regards,

Carlos

[destroyer X]

I cannot agree with this power rating Meyer paper informed.

attached,

regards,

Carlos

[destroyer X]

your email adress and i will upload you the 3.7 Megabytes PDF that has more quality, much more readable.

regards,

Carlos

[destroyer X]

Monteiro family... family of European origin, Portuguese, arising from
colonizers of Brazil.

regards,

Carlos

[destroyer X]

is that possible with this tiny transformer?...is this real?

Guarantee is full...covering almost everything exception is ligthning maybe... 5 years full guaranteed.

This is serious..we have special judges for Consumer Protection...big risk..seems they trust in their product.

Looks they use wind tunnel, and power transistors without insulation to better heats transference..good idea...clever folks..the heatsink tunnels are insulated from the main chassis.... i had published something alike in 2004..others have done that before me too.

regards,

Carlos

[destroyer X]

very crazy that..seems they use special energy sources to feed these units...home supplies cannot feed these units..only generators and special instalations...imagine the consumption pumping out 10 kilowatts in classe AB...or better, class H..... enormous current.

Is this exagerated?.... observing the transformer..... no more than 1.5 Kilowatts of audio possible...maybe even less...do you believe in Crest power, short time instantaneous power burst!

regards,

Carlos

[Workhorse]

After looking at the schematic and power supply rails voltages their ratings are FAKE & HOAX

The schematic is from X5 which boasts 5KW output, but the transformer will noway sustain such power level.

I am just surprised how can they Boast so much about these funny fake ratings

[destroyer X]

Look at Meyer text i have post.....then take the rail voltage... multiply the supply unloaded voltage by itself (squared)....then divide by 2 ohms.....130 volts means 8450 watts aprox..... this does not make sense to me.

In my mind, the lower voltage supply (65) will drop to 50 volts with two channels operating full continuous power....sinusoidal entering.....2 ohms loads to each channel and around 450 watts Rms will go out to each channel....and will overheat, 25 seconds nd thermal protection should enter.

That's the input i need...people defending... and showing us "how" this can happens.

These guys are skilled...they are working with amplifiers (had another brand name) since 1980 or around that...maybe a little bit earlier.... they know what they are doing.... some guys from the best are there... i cannot understand these enormous numbers of power...and the input power cable is not thick to hold 100 amperes..nor the fuse they use....nor the transformers..maybe they are using some connection capturing or blending the AC mains supply that should be rectified and used...i am trying to understand that.

This may be a transient power.. a dinamic short time peak of power...something hard to even measure, so fast it should be, will need memory in digital instruments... a milisecond pulse of power...something distorted.... i do not know.....reason why i have posted asking for answers.

Friends informed they are used... big Trio Electrico trucks using... they are avoiding toroidal because roads, vibrations, are causing mechanicall problems with the toroidal transformer..maybe broken core or something alike....they returned to E/I as Brazil uses this mobile...different compared to other countries...our needs are power..to play very loud and to travell by road...facing huge vibrations.

Friends that works with Funk music....professional friends that install sound equipments to parties, told me they play loud, also they need auxiliary generators to power the units and that they use to switch the protection, because excess of heat... this is allmost all i know.

There is some passion and tollerance in Brazilian's judgement, the evaluation about it, because it is a national industry with some tradition and pioneering spirit of courage ..they have not copied, have created and innovated ... deserve our admiration and our forgiveness and tolerance to this form of exotic large numbers of power published... We were closed to enter imports from 1964 to almost 1980... we had to make all the stuff here..no importation allowed.... so...when this finished, we were delayed... these ones have contributed to the development of the technology applied to audio electronics.

regards,

Carlos

[destroyer X]

Strange power numbers.

Do you have a link folks?

regards,

Carlos