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Old 13th January 2013, 05:13 PM   #1
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Default Compact simple EQ

Hey guys,

I want to build/buy a simple, compact EQ. I really only need three knobs, to control low/mid/high.

A 7-band would be ideal, but since size and price are concerns, I can deal with something less, if that makes things easier.

Thanks!
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Old 13th January 2013, 05:44 PM   #2
DUG is offline DUG  Canada
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http://www.ti.com/lit/ds/symlink/lm1036.pdf

All in one

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Old 13th January 2013, 05:45 PM   #3
DUG is offline DUG  Canada
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And your controls can be remote from the audio path.
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Old 13th January 2013, 05:59 PM   #4
GoatGuy is offline GoatGuy  United States
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... and the channel-to-channel tracking is essentially guaranteed by the accuracy of the components YOU use, not the potentiometers.

... and the implementation of "loudness" compensation is nominally ridiculously hard to accomplish, but with the chip, it is trivial.

... and "noisy potentiometers" (the bane of audio since the first amplifiers were ever conceived) can be "filtered away" with simple capacitor-in-parallel-to-wiper-and-ground configurations. Very smooth transitions possible.

... and possible to implement VERY slow time-constants (and set-and-forget) on volume controls for use in restaurants to avoid jarring (to diners) acoustic changes. (the possibilities are endless here)

... and very low phase distortion, by the creative genius of the circuit's designers.

... and frequency response well above audio range ... 200+ KHz.

... and best of all CHEAP all things considered. 1/20th the cost of trying to do it all with precision components, buffers, post-compenstation amplifiers.

... and FAST to implement
... and SIMPLE to execute, even by novices
... and utterly reliable over decade-time scales.

GoatGuy
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Old 13th January 2013, 05:59 PM   #5
GoatGuy is offline GoatGuy  United States
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Default Why LM1036 rules...

[duplicate comment - removed by author]

Last edited by GoatGuy; 13th January 2013 at 06:00 PM. Reason: duplicate comment!
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