[Surround Sound for car audio]

Hello guys!

Well i did a prototype version (no PCB yet), in my tests the circuit, well, it work some how the way i wanted, but for a very cheap circuit it will do.

Now i need some advice, i was reading a book named "Car Audio Secrets" that came with a "Time Alignment" schematic for the speakers (full text here), the link says that the sound will sound great and so on. It is true?

Just changing fases the way the schematic shows it will make my car sound system sound better? I did not test the schematic because it says that i will need just 2 channels, and my Head Unit have 5 (2 front, 2 rear, 1 sub) and i have 2 mosfet 4 Channel Power Amplifier.

If is all that good, there is a way to do it with electronics instead of wiring?

[Surround Sound for car audio]

Ok, got the idea, i will go by your design then.
Thanks.

[Surround Sound for car audio]

So, in alt-a what sugestions do you have?
Should i duplicate that circuit and connect that to ICb pin 5 or the modification that you have made is the way to go. I've did the second option because i did not understand your modification at the pot connection.

[Surround Sound for car audio]

Ops, my mistake! Let me fix that.

[Surround Sound for car audio]

Thanks audioguru.
One thing that mess my mind aroud was the fact that there the circuit is using L/E channel input in to +/- of the IC, but you solve it!

Now i have made two versions, one that you have fixed and another one based on your modification.

[Surround Sound for car audio]

I've been messing around a bit, but i need to build this to make further tests.

[Surround Sound for car audio]

Ok, fixed.
I will work on the values to work with simple supply. Tell me something, what about noise? What should i consider, killing?

[Surround Sound for car audio]

This could be a problem, the circuit ask for a +12v, -12v and GND, maybe i will have to work out an dc-dc converter for this circuit.... or not.

Maybe i could do something like this but the voltage will be too low (+- 6v), the second option i think it will not give the circuit enought power 40ma. Or maybe work out a way to convert the car 12vdc to something like +-15vac and use this circuit instead.

After a few tests maybe i will add a level control and a specific filters and maybe an active crossover control to the centre and subwoofer output.

[Surround Sound for car audio]

Thank for the reply.....

But, the main problem is how to power up the Hafler circuit, is opamp based and this kind of device need a +12vdc/-12vdc (symmetric) ???

[Surround Sound for car audio]

Oh... by the way...
I have all the power amps that i need in my car, you can see my car pictures at this address.

[Surround Sound for car audio]

Hello Sukhbinder, thanks!

The effect that i want is the same as an Home Theater, do you know if this circuit will do the same efect? I'm working with the Hafler Surround Sound (waiting for the IC) now, tell me something, do you think that if i use a filter to make a voice attenuation i will get a better result?

Thanks!

[Surround Sound for car audio]

Thanks audioguru!!

[Surround Sound for car audio]

Hello guys!

I was wondering, if i build a "spatial stereo" with the Philips TDA3810 and using my car audio REAR output, could this make the effect of hearing  everyting but vocals and bass in the rear speakers of the car?

I think it would be a nice effect to let the front channel to be normal and the rear channels a bit different (spatial or wide stereo).

This Philips TDA3810 will do the effect or i'm in the wrong direction?