There is a saying that a beautiful woman has such power to tyrannize
a tyran. Now, we know that speakers can do the same to the amps.
There is another saying, a beautiful woman is a heaven to your
eyes, a hell to your soul and a havoc to your bank account.
a tyran. Now, we know that speakers can do the same to the amps.
There is another saying, a beautiful woman is a heaven to your
eyes, a hell to your soul and a havoc to your bank account.
Beautiful women are easier to find than great speakers but great speakers are easier to live with and keep.
True, I would still modify the Victoria's model, I mean Kappa 9,
so the marriage of the usual normal amp and speaker would
be a success. The trouble is I don't have the model lying around
in my home.
so the marriage of the usual normal amp and speaker would
be a success. The trouble is I don't have the model lying around
in my home.
Some people like their women fast and expensive, but it all ends up in expensive tears IME. 😀
But let's get back to fixing that explosive Gale GS401:
Yes, the 7uF should come after the 0.3mH coil. But it's still broken. Impedance too low.
Impedance is root L/C, so to raise it make the capacitors smaller and the coils proportionately bigger.
Third order filters have a 3:1 component ratio optimally, getting bigger for capacitors, and smaller for coils. Unless you put up to 6 ohms in front, when it slides towards 1:1.
Voila. Same target frequency response, better impedance, cf the dotted lines. How hard was that? You don't really even need to know much about the drivers. 😎
But let's get back to fixing that explosive Gale GS401:
Yes, the 7uF should come after the 0.3mH coil. But it's still broken. Impedance too low.
Impedance is root L/C, so to raise it make the capacitors smaller and the coils proportionately bigger.
Third order filters have a 3:1 component ratio optimally, getting bigger for capacitors, and smaller for coils. Unless you put up to 6 ohms in front, when it slides towards 1:1.
Voila. Same target frequency response, better impedance, cf the dotted lines. How hard was that? You don't really even need to know much about the drivers. 😎
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Inductor, I can scarcely have hung around diyaudio.com all these years without noticing your huge willingness to help. 🙂
Nevertheless, the ragged bass driver aka the Peerless 830667 is a hopeless candidate to replace the old AR paper 8" woofers in the Gale GS401. Why? Because they just lose it completely above 2kHz. Not damped enough, you see. It goes into wild resonance.
My sim relies on a well-behaved bass woofer. In other words, if you want to recreate the splendid Gale GS401A, use a smooth woofer. And fix the Amp-Killer tendencies. 😎
Nevertheless, the ragged bass driver aka the Peerless 830667 is a hopeless candidate to replace the old AR paper 8" woofers in the Gale GS401. Why? Because they just lose it completely above 2kHz. Not damped enough, you see. It goes into wild resonance.
My sim relies on a well-behaved bass woofer. In other words, if you want to recreate the splendid Gale GS401A, use a smooth woofer. And fix the Amp-Killer tendencies. 😎
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That's not what I see fron the on-axis frequency response on the Gale GS401, unless they are curve artifacts, they are not smooth at all. Anyway maybe you measured the original 8" woofer and know that (the behaviour is good). Electrically and T/S they are identical. I know it doesn't look great but we are talking about a 3-way for God's sake.
Well, yes, it's a three way, but a very limited single coil filter on the bass. Those old AR type woofers were high inductance acoustic suspension and had very steep natural rolloff with heavy paper cones. Not actually much output above 1.5kHz.
You're going to hear the cone breakup on the Peerless 830667, because I estimate it's only going to be about 6dB down at 3kHz. It's a bass driver which needs a second order at least. I think the 22uF in the mid filter could be 18uF as it goes. Then it's almost exact curve matching. ASSUMING I have chosen (Visaton) drivers close enough to the originals electrically.
You're going to hear the cone breakup on the Peerless 830667, because I estimate it's only going to be about 6dB down at 3kHz. It's a bass driver which needs a second order at least. I think the 22uF in the mid filter could be 18uF as it goes. Then it's almost exact curve matching. ASSUMING I have chosen (Visaton) drivers close enough to the originals electrically.
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