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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Want to build resistor..
This resistor is very simple. It will have
stereo RCA in and out, and 1/8" mini in and out. All it will do is attenuate 2.5khz by 3 dB, with a Q wide enough to modestly affect frequencies from 1kHz up to 4kHz. Essentially to mildly scoop out those audio frequencies humans most readily hear. One could plug a line source or phone into it, and RCA out, IE, to a stereo amp. One could use the built- in tone controls('Bass', 'Treble'), to tailor the ends of the bandwidth to taste. Result? A smoother, less intrusive sound at background or concert- hall levels. What materials do I need? |
#2
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Want to build resistor..
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#3
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Want to build resistor..
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#4
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Want to build resistor..
On Monday, May 30, 2016 at 8:30:43 AM UTC-7, M Philbrook wrote:
a Graphic EQ. Jamie ....which you can find on eBay, many under US$20 (and even cheaper at a ham swap). |
#5
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Want to build resistor..
On Sun, 29 May 2016 11:43:05 -0700 (PDT), wrote:
Result? A smoother, less intrusive sound at background or concert- hall levels. Smoother than what? Twin-T, RC filter. |
#6
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Want to build resistor..
Black Iccy wrote: "Smoother than what?"
https://upload.wikimedia.org/wikiped...indos1.svg.png Read up on it. |
#7
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Want to build resistor..
wrote in message ... This resistor is very simple. It will have stereo RCA in and out, and 1/8" mini in and out. All it will do is attenuate 2.5khz by 3 dB, with a Q wide enough to modestly affect frequencies from 1kHz up to 4kHz. Essentially to mildly scoop out those audio frequencies humans most readily hear. One could plug a line source or phone into it, and RCA out, IE, to a stereo amp. One could use the built- in tone controls('Bass', 'Treble'), to tailor the ends of the bandwidth to taste. Result? A smoother, less intrusive sound at background or concert- hall levels. What materials do I need? You want a parametric EQ you can build yourself. Good luck with that. Gareth. |
#9
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Want to build resistor..
On Tuesday, May 31, 2016 at 3:00:18 AM UTC-4, Black Iccy wrote:
On Mon, 30 May 2016 16:23:22 -0700 (PDT) Black Iccy wrote: "Smoother than what?" https://upload.wikimedia.org/wikiped...indos1.svg.png Read up on it. No use pointing me at a set of Fletcher-Munson curves. I met those more than 60 years ago so if you think they're a point of enlightenment for me. Wrong. Particularly wrong because those curves are statistical averages for particular known levels. If you're trying to produce a response contour, those curves are not *it*. Turn up the volume a bit and your ears will respond differently. If you're trying to attenuate the mid-range audible levels for yourself, then you're intensifying the effect. Possibly wrong. If you think that a source has not had sufficient attention by the recording engineer at the time and that he/she did not endeavour to ensure a good result (one which you don't like) so you alter the response that's for you to decide. The easiest way is to build *nothing* and just raise the trevble and bass controls a fraction - same result. ________________ The point is, doing so sounds good to me. There are two audible "muddy zones" in the audio spectrum, to either side of 1kHZ: between 150-250Hz, and between 2-4kHz. A low-Q modest scoop(2-3dB) in those areas cleans things right up, whether I'm listening through full-size speakers, headphones, even if I'm listening through those dreaded Apple Buds that ship with every iPod. All I need is a filter for at least the higher "mud"(2-4khz) that can fit inline between my iPod and the receiver or amp it's connected to, or inline between the CD player and same amp. I have a 15band graphic EQ in my listening system, but need something a *little* less clunky for mobile purposes. A filter, if one can be built that's a little bigger than a Zippo lighter, would do the trick. By modestly reducing those areas, I don't need to "raise the treble and bass". Plus I've already bought some gain by said reduction. And even though I looked at the graph, the area of upper mid-range I need to reduce that sounds good to me is slightly lower, between 1-3kHz. As you said, the published curves represent averages, so they may not work for everyone. |
#10
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Want to build resistor..
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