OK OK. I will take up the challenge for the SERIES crossover. I would like to experiment. photo by tonight. Actually I was drown in the digital domain with PLL, DEM, global feedback, TIM, FFT and BODE plot. I hope to be drown by Linkwitz, butterworth, etc.

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Added on February 9, 2009, 10:22 pmAs promised, here is the Series crossover. the north 2 pin is input right, which is positive ?

the bottom mid 2 pin is common right ? which is treble and which is woofer.

All the Sifus,

I finally got time to open the speaker terminals to see the crossover.

Photos as below.

I tested it by connecting the bass unit directly to speaker cable , bypassing the crossover, and the speakers do sound bright enough!  

So, now almost 90% confirm the problem is with the crossover. Either the factory pre-set it like that, or something not working correctly. But the strange thing is, both side of the speakers sounded the same.... can both speaker crossover spoil at the same time kah? So lucky?

Now, my headache start.....  Sifus, how to check which component fail?

At the end of the day, if, just if, nothing is wrong with the crossover, how or where can I modify the crossover to make it sound brighter?

thanks in advance bro!  

there u go.

arh I have never tried using an active sub off the speaker cable.
I think it would be better if you tapped into the pre-out if you have one. anyone else happy to share some experiences with this

Handbuilt already or parts so you can assemble?

I have numerous handbuilt series croosvers built specifically for certain speaker parametres and models. this is a bit of a science so one crossover that sounds good on certain brand of drivers, doesnt mean it will sound good on another type of driver.
please elaborate on what you want and what you want to achieve. then you need to get the driver parametres and then design the crossover based on all thiel/small parametres of the drivers, the box they will sit in etc.

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Added on February 28, 2009, 10:04 am
so Chua, whats the verdict any feedback on the series crossover? remembering of course that it was designed for different drivers than what you have so probably will not fit in with your speakers but it is always fun to try these things.
anyway it is a good base to start of with and then your feedback we can change the caps and inductors to suit the sound your looking for.

by the way I am leaving for australia tomorrow and will be back in KK on the 15th then in KL for a morning shopping at the shop we met on the 29th March to get a few more goodies. always running out of that orange hook up wire so I will get 10 metres this time i think....

cheers and keep in touch.