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Using tweeters below rated frequency range
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Propagandabylove View Drop Down
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    Posted: 29 July 2013 at 8:01pm
I'm selecting some tweeters for a two-way sound system to cross over with eminence Kappa 15a  http://www.eminence.com/pdf/Kappa_15A.pdf - http://www.eminence.com/pdf/Kappa_15A.pdf

I'm looking at:
Eminence asd1001 (£25, 50W, rated freq from 2.5KHz)  http://www.eminence.com/pdf/asd1001.pdf - http://www.eminence.com/pdf/asd1001.pdf
Celestion cdx11446 (£40, 20W, rated freq from 1.5KHz)  http://celestion.com/product/127/cdx11446/ - http://celestion.com/product/127/cdx11446/.

Do you reckon I could get away with saving some pennies and getting the asd1001 but crossing over at 1.5KHz (a whole KHz below rated range) if I made sure I kept the tweeter below 20W?

If not, any suggestions on crossover point, drivers, etc.? I will gladly take any pointers. Thankyou, community!
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lycantheleopard View Drop Down
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Points: 428 		Post Options Post Options   Thanks (0) Thanks(0)   Quote lycantheleopard Quote  Post ReplyReply Direct Link To This Post Posted: 30 July 2013 at 1:46am
it might handle the power for a bit, but i can honestly say it will sound aweful being forced to do that range.  i would personally look into the eminence psd2002  it will go down to 1.5 k hapily and still get quite loud, but then you will need a horn.  its worth doing it right once though, if you use the 1001 you will be buying new tweeters anyways cause inevidibly someones going to get pissed and crank em up just that little bit more.
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TONY.A.S.S. View Drop Down
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Only a small thing here, but when you say Tweeters, you mean Compression divers and horns I assume. Tweeters are a different Animal.
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Dub Specialist View Drop Down
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heard good things about eminence psd2002 for the price ect, but as for taking any hf units below the frequency range is asking for trouble ie blowing the coil/diaphragm

for example ive got some 2402 and hf250s 
2402 on spec paper freq range 2.5-3k-15k i x/o them nowere near that i dont think many do iether as ive seen and read over the years, imho

6k-7k is a sweet spot and safer too as you up the freq range the more power yu can give them cus you are taking out the lower end of the higher end of the frequency (hope that makes senseBig smile)

same goes for the apt50s again on spec 45w@3.5k and 85w@ 5k and above for example again

and yes Tony sounds like comps/horns as he is in the 1.5k range

Do you reckon I could get away with saving some pennies and getting the asd1001 but crossing over at 1.5KHz (a whole KHz below rated range) if I made sure I kept the tweeter below 20W?

i woundlt do that go for the psd2002 over the asd1001 any day of the week, not worth saving a few pence, and like has been mentiones yu prob end up blowing that asd1001 buy new diaphragm ect then yourll think should of brought the psd2002....ended up the same price in the end..


Edited by Dub Specialist - 30 July 2013 at 1:06pm
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imageoven View Drop Down
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Originally posted by TONY.A.S.S. TONY.A.S.S. wrote:

Only a small thing here, but when you say Tweeters, you mean Compression divers and horns I assume. Tweeters are a different Animal.


What do you mean Tony - I always thought it was a fairly broad term for any HF device?
online dictionaries all seem a bit vague too;

Definition of tweeter in English


tweeter

Pronunciation: /ˈtwiːtə/

noun

  • 1a loudspeaker designed to reproduce high frequencies.
2a person who posts on the social media website Twitter.


Keep pushing on, things are gonna get better.
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ceharden View Drop Down
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Points: 11851 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 31 July 2013 at 12:45am
Couple of points;

The lower you want to run a compression driver, the larger the horn you need, it's not just the driver itself which determines the lower limit

Very few 1" compression drivers are happy below about 2kHz and usually only the expensive ones.  Even fewer actually sound good that low.

These are a pretty good deal at £35 (with JAM club membership)
http://www.bluearan.co.uk/index.php?id=PAUSD44BF&browsemode=category

I would certainly rate them higher than the PSD2002.
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TONY.A.S.S. View Drop Down
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Originally posted by imageoven imageoven wrote:

Originally posted by TONY.A.S.S. TONY.A.S.S. wrote:

Only a small thing here, but when you say Tweeters, you mean Compression divers and horns I assume. Tweeters are a different Animal.


What do you mean Tony - I always thought it was a fairly broad term for any HF device?
online dictionaries all seem a bit vague too;

Definition of tweeter in English


tweeter

Pronunciation: /ˈtwiːtə/

noun

  • 1a loudspeaker designed to reproduce high frequencies.
2a person who posts on the social media website Twitter.


It's a question of terminology. In the Audio business, we all know that a tweeter is a distinct product on it's own and if you read the opening post, a Compression Driver is mentioned.
If we were really using the Generic term, I guess we would be calling the VHF Bullitts, and I hope we never refer to the mid as a Squawker, although it might suit some sounds I've heard.
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luton_soundman View Drop Down
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Psd2002 sound terrible within its limits let alone outside of them. Other comps same price sound much better
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ArthurG View Drop Down
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Originally posted by luton_soundman luton_soundman wrote:

Psd2002 sound terrible within its limits let alone outside of them. Other comps same price sound much better
+1
anything sounds better than PSD2002. worst diver on the planet. period.

and kappa15A is also one shit of a driver. Good luck to tam the huge 15dB peak at 2kHz...
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mini-mad View Drop Down
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Originally posted by ArthurG ArthurG wrote:

Originally posted by luton_soundman luton_soundman wrote:

Psd2002 sound terrible within its limits let alone outside of them. Other comps same price sound much better
+1
anything sounds better than PSD2002. worst diver on the planet. period.

and kappa15A is also one shit of a driver. Good luck to tam the huge 15dB peak at 2kHz...

... funny, they sould great in my CUBO15s....
If it sounds like a gorilla is trying to escape, turn it down.
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Timebomb View Drop Down
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Kappa 15s sound good for upper bass/ low mid in a horn, for mid up to 2KHz they really are quite nasty.
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ArthurG View Drop Down
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Points: 988 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ArthurG Quote  Post ReplyReply Direct Link To This Post Posted: 03 August 2013 at 2:34pm
my comment was related to this topic, ie kappa15A in 2-way cabinet.
For bass~low mid application, it may sound half decent, but its another story...
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