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Old 18th May 2006, 03:53 PM   #1
RDV is offline RDV  United States
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Default Opinions on tweeters please.

I'm using these and they were cheap and sound okay but don't go low enough leaving a hole in the 1600hz to 3000hz range.


I'm thinking of trying these. Has anyone here tried these tweeters? What do(did) you think of them?

TIA

RDV
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Old 18th May 2006, 04:02 PM   #2
infinia is offline infinia  United States
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Hi RDV,
The new tweeters Fs is around 1.6KHz so IMO wouldnt run them much below -3dB at 2*Fs unless a very large order highpass filter is in effect. Seems there are much lower Fs tweeters to be had for not much more $.
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Old 18th May 2006, 04:10 PM   #3
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Isn't the Fs too high to let you use them from 1600Hz ?

Fs: 1,579 Hz is stated on the parts express website.

What are the LF speakers?
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Old 18th May 2006, 04:22 PM   #4
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Same price, same brand, proven track record.
http://www.partsexpress.com/pe/pshow...number=276-152
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Old 18th May 2006, 04:51 PM   #5
RDV is offline RDV  United States
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They're going in some bookshelf speakers with a 6.5 woofer.

Someone gave me the speakers with drivers completely shot out. I just bought some cheap drivers from Parts Express but the tweeters aren't performing as well as woofers(which I thought were amazing for $10.00) so I thought I'd upgrade a bit.

If I were getting a better x-over too, I would just go with some high-end drivers but the cabinets don't really rate that.

The original tweeter(cone) was 6 ohms so I'm trying to stay there.
I don't even know where exactly the x-over is set on these.

They sound pretty good with my DIY LM3886 amp though.

RDV
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Old 18th May 2006, 04:52 PM   #6
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RDV , it is best to choose a tweeter which has its Fundamental Resonance at least 1 octave below the crossover frequency you wish to use . For use from 1600 , use a tweeter with 800Hz or lower Fs . There are plenty of such to choose from . Even with 1 octave below you will need to use a crossover with a slope greater than 6dB/octave , or you will get distortion - look at the resonance on the Audax data sheets in those links - how long it extends for . If you want to use a single capacitor , 6dB slope , then use a tweeter which has Ferro-fluid to admp its Fs . best wishes , Alan .
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Old 18th May 2006, 05:07 PM   #7
qwad is offline qwad  Australia
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hi lve used the audax tweets before and they didnt stack up too badly in my wiev you would be better off with the .75 in audaxes than the miniature pioneers TC
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Old 18th May 2006, 05:10 PM   #8
RDV is offline RDV  United States
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I'm a newbie to DIY Hi-Fi audio so I had to look up what Fs means. I think I understand the concept of 'free air resonance' now.

My thing's been building DIY guitar effects, I'm having to learn a new language.

RDV
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Old 18th May 2006, 05:44 PM   #9
RDV is offline RDV  United States
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I wonder why the .75" supposedly goes lower than the 1"?

Even though the Fs is much lower on the 1".

Doesn't seem right to me.

RDV
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Old 18th May 2006, 06:04 PM   #10
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2200Hz is the -3db point. It will play to Fs if you push down the top end and use a steep slope at the bottom.
As you be a newbie that is probably pretty cryptic.
To put it simply, the only way you're going to be able to do a drop in replacement without modding the crossover is to find a tweeter with the same parameters as the unit your replacing. That is more involved than matching impedance.
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