Hi
I’ll keep this short. I know little about EQ and have found some advice re my speakers: Digital Equalization For The Cornwall ? - Technical/Restorations - The Klipsch Audio Community. How do I implement this? I attach screenshots of the exact advice from site and a screenshot of my attempt at implementing (doesn’t look right to me):
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The quote talks about three filters but vaguely describes two of them?
To me it seems impossible to replicate anything meaningful without any further specifics.
I do see a high shelf filter of a Q greater than 0.7 at around 650 Hz and some 3dB (bluish color) and then you’ve got two peak/dip filters set, with one specified in the screenshot.
Without more specific info, I don’t see anyone being able to help, sorry…
Cheers anyway, appreciated
Are you sure these are exactly your speakers, same generation and production year? Klipsch Heritage models are in production for decades, and as far as I know the iterations have changed dramatically in terms of x-over and tonal balancing. Especially the current models (generation IV with Forte and Cornwall) being rather on the warm, silky side than shrill. If we are talking about very old units never been properly serviced, deterioration of capacitors is also an issue causing annoying sound.
If you encounter similar problems and have the same models, EQing might indeed help. In your example you used a bass shelf filter (Band 1, green), which is not mentioned in the post. Set Band 1 to flat or deacitive it, as attenuating bass and lower mid would contribute to even more harshness.
If you want to come close to what they describe with their 3-band EQ, set a ´peak/dip (Bandpass) filter to 1.2Khz, Q=0.7, -4dB, and another ´peak/dip´ one to 5K, Q=1, -6dB. You can use filter bands 2 und 3 if there are preset to ´peak/dip´ type.
Please note this broadband kind of EQing cutting -4 or -6dB is dramatically changing the tonal balance and might lead to the speaker sounding dull and lame. If I would have to encounter a speaker sounding harsh and shrill I would rather try to identify a narrower frequency range causing the problems, so they could be eliminated using a more precise notch filter (Q=4 or higher with -4 or -6dB).
But according to my experience you have to do some experiments to understand the precise frequency. I usually put an even steeper, narrower filter (Q=10), set it to +8dB (double of what I am wanting to cut out later) and try to figure out at which frequency it ´hurts the most´. If you then reverse the filter to a notch dip (Q=6, -4dB), you have a pretty good chance to cut out the annoying frequency range.
