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Old 22nd February 2013, 12:21 AM   #1
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Default adding EQ without screwing up sound; few questions...

Hello,

I would like to add a 3 or 4 band EQ section to my pre amp, possibly at the input rather than output.
Ideally this EQ needs to do this (for each band): +6/-26dB
Is it possible to do this without deteriorating the sound quality?
Possible to make a passive EQ and have the 0db position offset by 6db down (if you get what I mean)?

What is the best way to implement this EQ?

Is this where VCA or autoformer can be used?


Thank you,
Herman
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Old 23rd February 2013, 02:50 AM   #2
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What would be a better forum to answer this question?
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Old 23rd February 2013, 04:20 AM   #3
DUG is offline DUG  Canada
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"...Ideally this EQ needs to do this (for each band): +6/-26dB
Is it possible to do this without deteriorating the sound quality?..."

This question begs for opinions.

One opinion would be that any EQ will deteriorate the sound quality.

In particular -26dB.

What are you trying to compensate for?
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Old 25th February 2013, 04:44 AM   #4
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>>What are you trying to compensate for?

I will use this attenuation to almost completely cut a certain freq band. This is not normally used for listening music but quite often for mixing tracks and transitioning from one to another track.

I am looking for (if not the perfect solution) the least compromised implementation of this +6/-26dB EQ capability. Can you specify the type of a circuit that would be of least deterioration to the signal path?
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Old 26th February 2013, 04:42 AM   #5
DUG is offline DUG  Canada
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Well, I've stated what I wanted to but here is something you can consider:

Guitar tone stack calculator.

Play with the values and see the results.

I think this is the best you are going to find...but that is just MHO:

TSC

Happy toning.

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Old 26th February 2013, 05:04 AM   #6
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Quote:
Originally Posted by noviygera View Post
Can you specify the type of a circuit that would be of least deterioration to the signal path?
Passive circuits have the least degradation in my experience - so RC or LC.
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