pcb for 2xSTK4141V

[p2mine]

hy everybody!

I'm building a 4.1 sound system, and I choose to use STK amplifiers.
I've done my pcb for the surround speakers. Can someone tell how good or how bad is my pcb?
I've used the standard schematic for STK4141V.

[p2mine]

enybody?

I would appreciate your support. I don;t know too much about ground loops, and I think that there might be a problem. there somwhere...
the inputs are too far from the center ground point. can that be a major problem?

thanks in advance!

[p2mine]

somebody?

[p2mine]

so, if nobudy says anything, i'm gonna start buiding this.
I will use presss-and-peel paper with the toner method.

[digi01]

Hi p2mine,

The first step before making any boards would be to prototype the circuit and do extensive listening.I suggest you may bulid the amp use point to point or bread boards modes at first.

I have used STK439 and STK465 dual chips for my projects in 1993 year.it is sound good,impression!


good luck

-digi

[X.G.]

IMO,STK41X1 series power ICs are good,but not very good.They sound a bit harsh, lack of high freg,and very good in low freg.I think they maybe suit for sub woofer amp.

advice:the output GND of PCB separates with the input GND.

good luck

X.G.

[p2mine]

well, i've already done the point-to-point wiring.

actuallly i've already built the pcb for one STK4192 that i'm going to use as subwoofer amp.
the pcb is the one that sanyo reccomends in it's datasheet .

For me, the sound was impressing. I feel that this is the chip-amp I'm going to use.


another problem for me is what filters should I use for satelites and subwoofer?

I've design for subwoofer a 80dB/decade filter using TI's filterPro utility, and for the satelites a 60dB/decade. the cutoff frequency is for sub at 120Hz, and for satelites at 150Hz.

The sum of the signals looks like this:

[p2mine]

The ground for the inputs si now taken from the output point point .

Is this way better?
Why?

[p2mine]

now, the schematics for the sub filter filter:
80dB/decade, 120 Hz -3dB frequency, gain 1

[p2mine]

and for the satelites:
60 dB/dec, 150 Hz -3 dB frequency