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27th September 2012, 04:33 AM
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#1 |
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diyAudio Member
Join Date: Aug 2012
Location: Amravati Maharashatra
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Motional feedback amplifier based on Philips 40 wats amplifier 1970s
Hi all
I fond Motional feedback amplifier when i browsing it make some changes in original Philips 40 wats amplifier lat 1970s |
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27th September 2012, 09:27 AM
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#3 |
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diyAudio Member
Join Date: Aug 2012
Location: Amravati Maharashatra
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Hi am build the old version a philips 40 WATS 1970s but this one is better because very low distortion original is also very good i used 10" woofer 1" tweeter shield enclosure
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27th September 2012, 09:38 AM
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#4 |
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diyAudio Member
Join Date: Apr 2004
Location: Lousy Anna
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So you used it full range? Why not bi-amp and use only on the low section? Is there any benefit to the tweeter / HF section?
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Troy Thinking positive doesn't make things better, it makes you a better person. |
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27th September 2012, 12:06 PM
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#5 |
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diyAudio Member
Join Date: Aug 2012
Location: Amravati Maharashatra
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HI i prifard to use tweeter & woofer because this amplifier don't need passive filter with tweeter hi frequency response is very good can you give me some suggestion about this amlifier
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27th September 2012, 01:00 PM
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#6 |
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diyAudio Member
Join Date: Apr 2004
Location: Lousy Anna
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I don't know what you mean by suggestions, but to me a motional feedback amplifier would be used in the LF section of a bi-amped speaker.
I use a negative feedback electronic suspension system designed by Mr. Erath.
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Troy Thinking positive doesn't make things better, it makes you a better person. |
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18th May 2013, 07:24 AM
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#7 | |
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diyAudio Member
Join Date: Mar 2004
Location: Jakarta
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Quote:
but could you elaborate why/how this amplifier don't need passive filter with tweeter hi frequency? is it because you have two seperate amp for low and hi part? (bi-amping with active x-over or passive network in front of the amp?) |
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19th May 2013, 01:31 PM
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#9 |
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diyAudio Member
Join Date: Mar 2004
Location: Jakarta
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piezo HF? hm... don't really like it except for filling the air with really high frequency spectrum...
or I suspect that he use another capacitor coupled tweeter in parallel with the woofer? Which is actually doing 1st order filtering... |
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