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OK, so I had to go and get a pair of those Rat Shack... [message #42014]

Wed, 23 July 2003 14:31

Garland
Messages: 269
Registered: May 2009

Grand Master

...40-1310 super tweeters while thay were on sale and now what do I do with them? Add 'em to the Theater 4's? what's the best way? or pop 'em on top of the RS 1354's in the TQWT? I'd appreciate tips from those who might have successfully integrated this supposedly decent tweet. I am looking for the last bit of air in the Theater 4's but may have to settle for improving the high end of the quasi-Voights.

Thanks.

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Oh, and I wanted to say hi to you guys! [message #42015 is a reply to message #42014]

Wed, 23 July 2003 14:50

Garland
Messages: 269
Registered: May 2009

Grand Master

...Have been busy playing with my Foreplay preamp the last few weeks- sounds good with Magnequest parafeed output transformers! The Theater 4's really let the subtle changes in electronic tweaking really stand out! -What and addictive hobby!

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Top octave super tweeters [message #42016 is a reply to message #42015]

Wed, 23 July 2003 15:13

Wayne Parham
Messages: 18676
Registered: January 2001

Illuminati (33rd Degree)

In the seventies, I used a super-tweeter from 5kHz and it was advertised to 40kHz. Great sounding part with sizzle and great clarity too. The super-tweeter was a round horn with an aluminum diaphragm, about 3/4" as I recall. I ran 'em with a second order Butterworth and a 20 ohm resistor in shunt across the tweeter.

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Godzilla had the interesting idea . . . [message #42018 is a reply to message #42014]

Wed, 23 July 2003 17:49

Tightwad
Messages: 41
Registered: May 2009

Baron

. . . of firing them backwards.

http://www.melhuish.org/audio/diy47.htm

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Re: Top octave super tweeters [message #42019 is a reply to message #42016]

Thu, 24 July 2003 09:41

Garland
Messages: 269
Registered: May 2009

Grand Master

I notice that the crossover in the RS tweeter has an inductor(.26mH). I assume this is a 12dB crossover.What if the inductor is removed? Can the crossover point be raised from what I believe is too low? Does a larger cap or a smaller cap than the stock 2.2uF effect such a change? I want the super tweeter to take over for the PSD 2002 in as natural a way as possible(least electronic filtering concurrent with phase coherence)using the natural roll-off of the Eminence tweeter.

Thanks.

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Re: Top octave super tweeters [message #42020 is a reply to message #42019]

Thu, 24 July 2003 10:13

Wayne Parham
Messages: 18676
Registered: January 2001

Illuminati (33rd Degree)

You'll probably blow the tweeter at very low power levels (like under 10 watts) if you remove the coil. I'm confident you've correctly identified that as a shunt coil forming a second-order high pass filter. Same thing with the crossover point - It probably can't be pushed any lower without damage to the tweeter.

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