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alfredokiwi
Senior Member
Joined: 07 Sep 2011
Posts: 268
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 Posted: Tue Oct 23, 2012 8:59 am Post subject: Equal-loudness contour on the mix (Maxx Audio Bass Boost) |
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Hi all, today I added another circuit improvement on my Pa500 for best quality on the recordings. It is a active "bass boost" feedback network that increase the bass response. Human ears have not a flat response, a roll off from bass to treble is the real ear response and any EQ that follows this approach will sound good.
The "Fletcher–Munson" curves is one of the first discovers about ears frequency response
http://en.wikipedia.org/wiki/Fletcher%E2%80%93Munson_curves
The reference measure is the Equal-loudness contour curves about ears response.
http://en.wikipedia.org/wiki/Equal-loudness_contours
Returning to the last Pa500 improvement here the demo about final sound quality with "Bass Boost" active feedback network (don´t touch anything more !!!). 
I don´t have more words about this stunning quality, is incredible the quality of the samples ROM inside the Pa series, after Maxx Audio circuit bend of course. 
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