DIY whizzer?

[Nappylady]

http://www.partsexpress.com/pe/pshow...number=269-912

Parts Express #269-912. Awesome little $0.49 full-range speaker. I got mine yesterday (16 of 'em) and have been listening to them. They sound surprisingly good, even not mounted in a baffle! My only issue with them is that there really isn't any response above about 16k. These speakers do not have whizzers, and I got thinking... is far-fetched to think maybe I could come up with a whizzer to put on the thing to improve the high treble response?

Or what about a coating of something? I'm deeply concerned about ruining the efficiency of these speakers, since they'll be used in a PA system, but at the same time, since these are *the* treble speakers, I'd really like them to do better in the treble than they are now.

Whaddya think?

[sreten]

16K top-end is very good, even for some dual-cones,
unless your saying its well down by 16K also.

16 DIY whizzers sounds too much like hard work to me,
and would probably cause more problems than they solve.

A coating as such won't really work either .....

I'd say what you may want is doping .....
as in model aeroplanes and paper wings.

You can see this a lot in older drivers, the darker centre section
of the cone is an impregnation of a stiffening agent to maintain
treble response (in a fashion).

Worth a visit to a model shop and trying on one unit ?

I'd say 3/8" around the centre of the driver but ?

/sreten.

[roddyama]

Originally posted by Nappylady
Parts Express #269-912. Awesome little $0.49 full-range speaker. I got mine yesterday (16 of 'em) and have been listening to them. They sound surprisingly good, even not mounted in a baffle! My only issue with them is that there really isn't any response above about 16k. These speakers do not have whizzers, and I got thinking... is far-fetched to think maybe I could come up with a whizzer to put on the thing to improve the high treble response?

Or what about a coating of something?

It sounds like a real fun project. I did something simular about 25 years ago when Olsen Electronics was going out of business. I bought 16 - 4" full range and mounted them in a di-pole line array. Nothing fancy, just two pieces of plywood with feet. They sounded quite good at the time, but most of all it was a lot of fun.

Originally posted by Nappylady
I'm deeply concerned about ruining the efficiency of these speakers, since they'll be used in a PA system, but at the same time, since these are *the* treble speakers, I'd really like them to do better in the treble than they are now.

Whaddya think?

Why would you be concerned about $8 worth of drivers? Actually, you only need to try it on two of the drivers to see if it does any good. I say go for it and have some fun. Go ahead and take a chance, you only live once.

[Bull]

To Nappylady, hope u mean public address[pa] for background music or speech, not pa [professional audio] since 10w speakers wouldn't last 5 seconds in professional audio high volume levels.

To make a whizzer just get a small piece of 'sugar' paper roll it at an angle and glue it together,then glue it to the dustcap of the fullrange speaker.It will make the treble travel a little more further.
And if it sounds harsh glue a piece of sponge to the back of the whizzer.
As u got 16 of them if u gonna use them at high volume levels not for hours on end though, you will need a passive band pass filter or hiph pass filter[although u'd lose some of the midrange tone with a hpf].