I thought of monoblocks on GU-72
For now it is necessary to complete some amplifiers for friends. 8W and 30W
Attachments
Last edited:
Have you tried the Pano test? It is really interesting and only requires a CD player or other digital audio source and a cheap multimeter. http://www.diyaudio.com/forums/mult...much-voltage-power-do-your-speakers-need.html
His test measures one quarter of the peak voltage that people actually use to reproduce music at home, when playing as loud as they ever want to play. About 38.22 % of them measured less than 2 V -> peak voltage less than 8 V -> less than 4 W into 8 ohm.
I don't understand your remark about something with a beat. Generally, popular music recordings are so compressed you hardly need any power for them unless you want to go deaf and/or want a conflict with your neighbours. Classical music is more difficult because some classical recordings have a large dynamic range (especially audiophile recordings). Or are you referring to audiophile recordings of acoustical music with drums? I haven't got any, but I can imagine they have large crest factors.
Hi all!
My last project at assembling: 2x200 @ 4 Ohm in AB class, dual mono, with MCU system (DC and temp. protection, 128dB relay attenuator, LED display, IR receiver, soft-start and etc.).
I am trying at last 4 years finish this amp
Good build.
I was curious to do a spice simulation on this amp. Everyone who swears by it could be surprised at the actual performance.
I can say one thing: if using that schematic as a base, it requires some serious double-checking and attention, because it's full of mistakes and confusions.
I couldn't find all the right models, as most of the transistors are now obsolete, so I used others that should work and tried to get it going. I had to change some values and correct mistakes to make it work. Perhaps the models are part of the issue, but I can't see any performance worth mentioning. We can get much better with a class ab amp. class a is supposed to be very low distortion, but that's really not the case, very far from it.
For one thing, cd/dvd recordings, although still compressed, are far less compressed than the vinyls used to be, and their dynamic range is significant in comparison. of course some recordings are better than others, less compressed, whatever. that's not the point. if you are satisfied with a low sound volume, that's ok, you are surely not going to wake the neighbor's kids with w few watts and low efficiency speakers.
Hi all!
My last project at assembling: 2x200 @ 4 Ohm in AB class, dual mono, with MCU system (DC and temp. protection, 128dB relay attenuator, LED display, IR receiver, soft-start and etc.).
I am trying at last 4 years finish this amp
Well done for your perseverance & result. What did you draw the model with, it's a work of art on its own.
Thanks )Well done for your perseverance & result. What did you draw the model with, it's a work of art on its own.
The model is drawed with Solidworks and rendered with Photoworks (I have tried to use Maxwellrender, but it was not succesful, because all file names are in russian language and Maxwell can't read it).
Here is some pics from Photoworks:
Attachments
There great, did it take 3 years for the drawing & 1 year for the amp
Keep up the great work
