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Old 25th February 2015, 06:58 AM   #1
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Question Looking for tweeter: dynamic sound, good tone.

I am building monitors with the Vifa ne123 4" as mids. I like this vifa.

I am looking for a tweeter that is going to have dynamic, impactful sound and a nice rich tone. Something between the sound of a compression horn tweeter and a large soft dome and still bearable for long term listening.

I tried the vifa ne19vts 3/4" soft dome. Garbage sound that is like dragging a stick across a cyclone fence. Tizzy soft and zero tone. This is the opposite of what I want.

Tried Morel CAT 378. Better but I'd want a bit more impact, and it's still slightly tizzy.

Any recommendations? Hard domes that are not harsh?

appreciate your help.
Herman

Last edited by noviygera; 25th February 2015 at 07:02 AM. Reason: addition
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Old 25th February 2015, 07:02 AM   #2
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pretty flexible on the crossover point since the ne123 is almost a full ranger.
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Old 25th February 2015, 07:23 AM   #3
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Old 25th February 2015, 08:28 AM   #4
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Old 25th February 2015, 08:46 AM   #5
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Quote:
Originally Posted by noviygera View Post
Any recommendations?
Herman
Hi Herman,

You have made qualifications about products without any mentioning
how or what you did to overall design.

I guess you must be doing something very wrong. Small Vifa type tweeters
are meant for MTM designs, usually come with weaker motors so their Qts
is higher making the response not smooth and in combination with the wrong
filter, I guess a bad sound is only natural.
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Old 25th February 2015, 09:30 AM   #6
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If a morel cat378 is sounding tizzy then I think either you haven't level matched it properly with the mid, OR you have crossed it two low or with two gentle a slope (or both).

Tony.
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Old 25th February 2015, 09:43 AM   #7
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That Morel tweeter sounds great crossed low and 6dB as well, don't understand his 'tizzy' comment.
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Old 25th February 2015, 09:58 AM   #8
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I've got DMS-37's (predecessor of the CAT-378) I originally only had a single cap on them. with nominal 2.8Khz 12db / octave acoustic slope.

They did come unstuck at higher levels with "dense" music (specific recordings only). I think it was primarily IM distortion caused by too much low level signal getting through to them. edit: there is the possibility though that it was actually the breakup in the mids rather than the tweeters, I've just always thought it was the tweeters causing the issue!

I ended up going with a 4th order acoustic at 2.8Khz and it cleared up the problem.

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Last edited by wintermute; 25th February 2015 at 10:00 AM. Reason: make comment about possibly being the mids.
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Old 25th February 2015, 10:37 AM   #9
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What type of capacitor are you using?

Start out by picking up some low values, like 3.0uF. You can always add some cheaper caps to get you to your target.

The Clarity MR 400V series is very nice sounding.
Jantzen Superior Z, or the Jupiter line are also nice.

Once you've heard the difference a good cap makes, especially on the tweeter, you'll be hooked.
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Old 25th February 2015, 06:23 PM   #10
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Using a dsp crossover so any slope and freq is possible. I would say that the vifa ne123 mid has good dispersion up to 5-5.5k
Morel cat 378 is not bad to my ears and is a step in the needed direction. Has anyone experienced neo3 or good metal domes or domesticated compression tweeters?
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