Please help find a tweeter for 5000-20000

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albertli

albertli

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Joined 2004
#1
Guys,
I lately try running my horn in 3 ways with active crossover. Have tried a loan pair apt200 but didn't find the sound to my liking. I have a 15" for the low and the JBL2445j for mid.
I would like to have something with better/smooth response but won't break the bank. :worship:
Regards
Albert
 
#4
#5
CharlieLaub said:
APT is crap.

What about a 12" SEOS horn and a good CD like the DE250/DNA-360?
SEOS-12™ DIY Sound Group (also sold by other vendors)
Denovo Audio DNA-360 compression driver DIY Sound Group
B&C DE250-8 1" Polyimide Horn Driver 8 Ohm 2/3-Bolt
BMS 4550 1" High frequency Compression Driver - BMS 4550 - BMS 4550 1" high frequency compression driver. BMS neodymium 4550 high frequency compression drivers are available here.
Click to expand...
Thanks Charlie,
I did finish a pair for friend with SEOS 12, DNA360 and JBL LE14a years ago. That one sounds nice till now. Haven't tried or listened to the BMS 4550. Can you briefly tell me how they compare.
If possible I would pin point on the good range from 5000-18000/20000.
Albert
 
#9
albertli said:
Thanks Scott,
Seems like a option. Pretty smooth at the range. I don't have chance to have a listen. Can you tell me more as of your experience?
Albert
Click to expand...

No experience with this driver, but I've listened to lower eff. planars like this (HiVi) in various designs (clean and clear but vertically directive). Not a driver I'd use lower in the treble, but that doesn't sound your application - so it could be a very good "fit". 😉
 
#10
Short version:

I tried an (OEM version of) the Fostex FT17H with a 2445J and dual 15".

I thought it was good enough. Some music was better with it, some vocals sounded nicer leaving it as a 2-way (but I may not have set it up optimally / didn't spend long experimenting).

These are fifty bucks each at Madisound.

Lots of pro audio companies have equivalent drivers.

albertli said:
Guys,
I have a 15" for the low and the JBL2445j for mid.
Click to expand...

I'm assuming the 15" is the weak link, with respect to efficiency. The >5kHz driver would only need to match that (not the ~110dB JBL driver).

~95dB above 5kHz is not too hard. You should be able to find that for well under $400.

kevinkr said:
Some idea of [...] the sort of radiation pattern you need to integrate with the midrange horn would be helpful.
Click to expand...

I agree. What horn is the mid driver on? Actually, I'm curious about the whole setup. Please post pictures.

The 2445J is an old driver, and the throat is "based on the exit geometry of the original Western Electric 594 driver [...] By our calculations, the initial flare rate in the older driver design was approximately 160 Hz"

That is: the 2445J has a long snout and and a very narrow exit angle.

Any horn that is a good fit to it will either have quite narrow dispersion, or a diffraction slot / some other magic plumbing.

https://www.jblpro.com/pub/technote/tn_v1n21.pdf

albertli said:
I would like to have something with better/smooth response but won't break the bank
Click to expand...

Better how? If it is just smoothness, a different diaphragm + equalisation might be an option.

Radian 1245-8 Diaphragm Fits Most JBL 1.5" and 2" 8 Ohm

If 'better' also means better dispersion, the tweeter option is the way to go.
 
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#12
dotneck335 said:
Lincoln Walsh Tweeter
Click to expand...

hollowboy said:
Short version:

I tried an (OEM version of) the Fostex FT17H with a 2445J and dual 15".

I thought it was good enough. Some music was better with it, some vocals sounded nicer leaving it as a 2-way (but I may not have set it up optimally / didn't spend long experimenting).

These are fifty bucks each at Madisound.

Lots of pro audio companies have equivalent drivers.

I tried the FT17 long ago. It didn't do things right to me and I had them switched to 90a after about 2 months.

I'm assuming the 15" is the weak link, with respect to efficiency. The >5kHz driver would only need to match that (not the ~110dB JBL driver).

~95dB above 5kHz is not too hard. You should be able to find that for well under $400.

I agree with you on the above.

I agree. What horn is the mid driver on? Actually, I'm curious about the whole setup. Please post pictures.

The 2445J is an old driver, and the throat is "based on the exit geometry of the original Western Electric 594 driver [...] By our calculations, the initial flare rate in the older driver design was approximately 160 Hz"

That is: the 2445J has a long snout and and a very narrow exit angle.

Any horn that is a good fit to it will either have quite narrow dispersion, or a diffraction slot / some other magic plumbing.

https://www.jblpro.com/pub/technote/tn_v1n21.pdf



Better how? If it is just smoothness, a different diaphragm + equalisation might be an option.

Radian 1245-8 Diaphragm Fits Most JBL 1.5" and 2" 8 Ohm

If 'better' also means better dispersion, the tweeter option is the way to go.[/QUOTE
Been there with a loaner pair, but they didn't quite make it to my taste and this is why I want to try 3 ways.
I have a pair EV HP640 horn and it goes 500 lowest.
Albert
Click to expand...
 

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#20
I think the drivers were fine, although I suspect PE sent me a restocked item ( previous buyer didnt like them? ) both drivers sounded the same. Peaky and smeared in the 4-8k range. Typically high spl drivers will have a lot of details, these guys didnt. I was very disappointed with them.

They were tested with a 2.2uF cap in series. I forget if I had a second order inductor in place or not. This was years ago.

I replaced them with vifa xt25's, which were great. Although, not as sensitive....
 
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