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8th February 2013, 12:01 AM
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#1723 | |
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diyAudio Member
Join Date: Jul 2004
Location: Fort St John, BC Canada
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Quote:
It does however add additional heating of the coil. As the coil heats it loses efficiency and this can have an effect on the sound. A large dc offset will either drive the coil into the plate folding the former in or drive it out of the gap. Either way you have damage to your speaker. I can agree that tube amps sound different from solid state but it is only a matter of opinion that tube amps sound better. Incidentally,we had just as many fried speaker come in for repair from tube amps as SS.
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David. Last edited by davada; 8th February 2013 at 12:07 AM. |
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8th February 2013, 06:42 AM
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#1725 |
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diyAudio Member
Join Date: May 2012
Location: 2457 Cascade Trail; Cool, CA. 95614
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Anyone listen to music? A pretty good jam can be found which really exercises a system... deep, deep lows, transients, highs and great playing. Go to HD Tracks and down load "Freight Train Jam' by WAR from the album 'The World is a Ghetto'.
Enjoy! -Richard Last edited by RNMarsh; 8th February 2013 at 06:48 AM. |
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9th February 2013, 06:00 AM
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#1727 |
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diyAudio Member
Join Date: Jun 2005
Location: Zürich
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Currently recording Schumann op. 39 (Eichendorff-Liederkreis). One of the best things I know.
Samuel |
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9th February 2013, 07:25 AM
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#1728 | |
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diyAudio Member
Join Date: May 2012
Location: 2457 Cascade Trail; Cool, CA. 95614
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Quote:
Where is the recording being made? Thx-Richard Marsh |
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9th February 2013, 04:57 PM
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#1729 |
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diyAudio Member
Join Date: May 2012
Location: 2457 Cascade Trail; Cool, CA. 95614
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I was looking over the description of the oscillator manual of a K-H 4400A and it suddenly dawned on me that without the regenerative feedback, we could have a really flexible notch filter, cheap. The notch circuitry is built-in and selectable freq. Its the oscillator circuit itself without the regen feedback path. A disconnect switch for the regen path and an input port to the notch et al and I dont have to build anything. I spare 339A could be used for that. ?? Just an idea.
Thx-RNMrash Last edited by RNMarsh; 9th February 2013 at 04:58 PM. Reason: Ready made notch filters -- |
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9th February 2013, 05:29 PM
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#1730 |
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diyAudio Member
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The problems with the state variable filter used that way is the intrinsic distortion of the amplifiers and the tuning. That is the core of the analyzer in several analyzers, the Boonton and the Amber are two examples. The passive notch, like the B&K, are better. You could modify the B&K with active circuitry to make a tuneable high q notch with it. We just need to reverse engineer its circuitry, not a small task.
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Demian Martin Product Design Services |
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