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RE: 20dB of Boost ?

DJK:

Thanks for the help with the Passive EQ circuit.

I just happened to have a couple of Perfect Lay 1.2 mH coils and old 6uf MIT MultiCaps. I used a 20 ohm 1% 10W resistor in parralel with the L and C as you suggested. The 20 ohm might be a bit much but I will listen to it a few days before making any further changes.

The difference is astonishing. I can finally really hear the cymbals and high-hats in both music and film scores.

Last night I watched Alfred Hitchcock's, "North by Northwest" and even though it's a ver old film, the orchestral pieces sounded better than I have heard.

On Genesis, "The Lamb Lies Down on Broadway", which I have listened to for 30 years, they sounded better than I have ever heard.

I previously tried 8uf in parallel with 20 ohm without an inductor, just the simplest R-C Contour Circuit and that was okay. But, adding the inductor to create the RLC Notch Filter made all the difference.

The response is very smooth and the sound seems to be much more transparent. The speakers almost seem to disappear. But the transistion between the bass cabinet and mid horn is much, much better. The mid horn has lost all of its 'honk' :-)

Thank for your invaluable help. I greatly appreciate it.

Have a great day.

Sincerely,

Synthsayer
"Ad Astra Per Alia Porci", - To the stars on the wings of a pig: John Steinbeck



Edits: 01/10/10

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  • RE: 20dB of Boost ? - Synthsayer 13:37:16 01/10/10 (0)

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