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7th January 2010, 09:41 PM
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#2 |
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diyAudio Member
Join Date: Feb 2002
Location: Sydney
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how does it work?
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‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky |
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8th January 2010, 07:34 AM
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#3 |
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diyAudio Member
Join Date: Aug 2008
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Here is the thought behind it
.5mh coil in parallel with the 3.3 uf cap is the regular second order hp filter around 3.2 khz, but I need it to taper off at 12 khz hi dispersion capability with the use of increase inductance this where the .05 mh coil in series, the other capacitor would kick in hopefully around 12khz or 13khz throught the other capacitor. The L pad is just to adjust the brightness of the Low tweeter
There are four possible tweeters for the low end tweeter and 1 tweeter chosen for the vhf Vifa XT25TG30-04 expected impedance is around 5 or 6 and 3.2, impedance at 12 khz needed to be determined and if I need more impedance Low end tweeter choices are: Vifa DQ25SC16-04, 1" Titanium Dome Tweeter (this is my first choice) D26NC-55-06 Pioneer FP66AP45-54F 2-1/2" Cone Tweeter to be tested and spec-ed Power handling: 40 watts RMS/55 watts max * Voice coil diameter: 1/2" * Impedance: 8 ohms * Frequency response: 2,000-20,000 Hz * Magnet weight: 2 oz. * SPL: 93 dB 1W/1m, second choice maybe for I need to see the FR data Bose 3 1/8 cone tweeter Power handling: 75 watts RMS/100 watts max * Frequency response: 2,000-20,000 Hz * Closed back design. Impedance: 4 ohms * Voice coil diameter: 1/2" * Magnet weight: 4.7 oz. To tested and spec-ed. |
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11th January 2010, 08:57 PM
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#4 |
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diyAudio Member
Join Date: Feb 2002
Location: Sydney
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FWIW, I'd be inclined to go with a more conventional cascaded xover layout, tapering the required responsed with resistors across the 1.5uF cap & .05 mH coil...
__________________
‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky |
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11th January 2010, 10:27 PM
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#5 |
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diyAudio Member
Join Date: Aug 2004
Location: US
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You low tweeter will have no output.
__________________
John k.... Music and Design NaO Dipole Loudspeakers.  "We have no right to assume that any physical laws exist, or if they have existed up to now, that will continue to exist in a similar manner in the future." Max Planck
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