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Old 20th June 2013, 08:34 AM   #11
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Get the information about "DOS-V" Project here:

MATRIX 1.4 - DOS-V VARIANT DEVELOPMENT SITE
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Old 20th June 2013, 08:36 AM   #12
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pak TARNO ..help my.............
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Old 20th June 2013, 08:57 AM   #13
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i like it
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Old 20th June 2013, 09:28 AM   #14
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just sound, not quality and safety
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Old 20th June 2013, 09:37 AM   #15
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Hi choirul, you can get the layout PCB design for DOS-V Variant here:

Download MATRIX 1.4 Free Audio Power Amplifier from SourceForge.net

Do not forget to decompress the package by using any decompresser program (winzip, winrar, Gnome File Roller, etc), so you will get the package contents ini PDF.

You may also get the original DOS-V layout PCB design in editable KiCad format (include in Gerber & NC Drill format), but, you must contact the DOS-V Project Maintainer (Heru Himawan T). Ask him to get the design for personal use only.
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Old 20th June 2013, 10:45 AM   #16
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Curiosity & proven is better than prejudice ...
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Old 20th June 2013, 12:44 PM   #17
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Quote:
Originally Posted by Not A Speculator View Post
Before you do comment to much, you better try such schematic ... do not forget to add a 330pF capacitor between base-to-collector of Q6.
I don't think so. If I was ever in need of 500W of audio power it would be with a more modern design which probably would be little different in cost.

Further: MJE340/350 must be extremely cheap or fakes to substitute for smaller transistors in the input/VAS stages. Much cheaper TO92 parts would ordinarily suffice for some parts there.

The input sensitivity, at 100mV, seems a bit high for modern line level inputs or digital sources. Any good reason to increase likely noise levels like this?
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Old 20th June 2013, 01:11 PM   #18
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You better do what you can do No one should ever force you Just like when someone uses GNU/LINUX, so that his mind is free ...
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Old 21st June 2013, 02:13 AM   #19
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sorry ... I have this power mmbangun overnight ... I adjust the value of the component schema. and I have tried using Sanken 8 tr final set. 20amp 55volt ac transformer wear. I do not understand the theory I just plug it in and solder. I am trying to load some kind of speaker ... from 8'' to 21'' .. test with music speakers leaf movement in particular frequwenci speaker movement is not in tune with the music ..
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Old 21st June 2013, 08:07 AM   #20
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Quote:
Originally Posted by choirul View Post
sorry ... I have this power mmbangun overnight ... I adjust the value of the component schema. and I have tried using Sanken 8 tr final set. 20amp 55volt ac transformer wear. I do not understand the theory I just plug it in and solder. I am trying to load some kind of speaker ... from 8'' to 21'' .. test with music speakers leaf movement in particular frequwenci speaker movement is not in tune with the music ..
mmbangun = ?????
This schematic required only 45Vac to 48Vac.... Check the PSU Schematic below,,
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