Stand alone tweeter?

Many thanks all for all the advices.

i will try to see if power conditioner can help.
I have tried all the possible positioning, for the treatment i have tried to position rugs and even borrow some panel treatment.

or maybe my speaker is just simply aging.
It maybe true that the harsh sound are ly happened when I play modern pop but sounds good when playing trio acoustic jazz combo.

@timlub, actually I am looking for stand alone tweeter notbsuper tweeter, so that I can just connect the jumper wire to this tweeter so by passing the speakers’ tweters itself.

@gondo101 

I have looked at the Forest in the Past.  I like the drivers that they have chosen and actually use the midbass myself in a few speakers.  
1 easy change to the crossover is to replace the tweeter cap.  The Forest are well thought out, but I'm sure that cost was kept inline.  
So, replace the single series tweeter cap with a cap that leans dark or rich harmonics that is still very detailed.... The Jupiter Condenser Beeswax  comes to mind... I'm sure that there are others, but this would be audible.... 

@gondo101

What speaker do you have? Also, here's some free, or nearly free ideas. First, throw some blankets/pillows around on the floor between the speakers and even behind them. See if any of that helps.

If your tweeter is mounted on a panel, PSA backed felt around it may help.

Depending on what your speakers are, a tweeter cap upgrade may also help, or perhaps you need to lower the tweeter level via an added resistor, but that's best left for the DIY forum here:

http://www.diyaudio.com/forums/multi-way/

@gondo101

One additional simple "tweak" is, if you are using Totem’s "claws and balls" supplied with the Forest, take them off the balls. Just have them sitting on the flat surface of the claw. I found the slight lowering of height that results does reduce treble energy from the Forests.

I don't think you can just swap the tweeter without having some knowledge of the crossover design. One common and easy way to "tame" a tweeter is by adding a resistor in series with the tweeter to lower its amplitude. Just be aware that nothing short of trial and error can yield any meaningful results. The easiest approach is to experiment with different off axis listening positions until you find one that suits your taste.