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In Reply to: RE: "series" notch filter with Khorn - why am I not seeing more effect? posted by freddyi on September 26, 2016 at 22:03:53
try values given below
Follow Ups:
I don't see any values.
they got posted down below in the threadPosted by tomservo (M) on September 29, 2016 at 11:36:36
In Reply to: RE: - which mic perspective = what we hear? is the boom and indistinct bass my room walls or the Khorn Peak ? posted by freddyi on September 21, 2016 at 15:57:25:"Hi Freddyi
Sorry for the delay.
What you want is a series tank or notch filter.Using your magnitude and impedance and eye balling your peak at around 10dB over flat, what you should try is a 3mhy choke, in parallel with 500mfd np and also in parallel 6 ohms.
That is in series with your woofer.
This should flatten your response nicely.
Have fun, best
Tom"
Karlson Evangelist
Edits: 09/30/16
thanks Tom - that seems to make more sense than the "series" (confusing term) filter. Do Khorns sound "tight" in a room whose walls don't excessively flex? mine sound like badly tuned bandpass boxes- do remember somewhat better sound in my old house with oak 2x4 and plaster over lathe.should I retain the Klipsch 2.5mH woofer choke?
Best,
Freddy
Karlson Evangelist
Edits: 09/29/16
Yes, just put that in series with what ever it was you had the impedance curve for, that is the load it is based on.
Best,
Tom
You know i never heard a k-horn outside, that would be the only condition where one can count on "no room effects" haha.
Things like resonant walls and floors do not actually cause peaks in the response but instead can put depressions and notches in the response when exciting that resonance.
My bet (based on the general response shape up close and far) is the driver / cabinet combination is what causes that peak and so that filter ought to be pretty close to what it needs.
Can you guestimate how long the horn path is?
I think Art Welter said a K-horn path is ~6.88 miliseconds. I might be able to give the house wall a little thump and see where it rings all by itself - - Hey - I've got a movie for you assuming you've not seen it - search for "VIY" 1967 - a Russian fairy (witch) tale from 1835 - its on Youtube with English subtitles, then also in parts with dub. There was an expensive remake which is in 3D you YouTube but imo no where near as good as the 1967 version.Do you have any sounds for Halloween? - i could never get out to find a drummer for a test clip.
VIY 1967 Trailer
Karlson Evangelist
Edits: 09/30/16 09/30/16 09/30/16
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