D
DaveC
- Jan 1, 1970
- 0
A set of Harman Kardon Soundsticks are obsolete with most modern computers.
They originally took digital audio via USB output from the computer and fed
it to a multi-channel audio amplifier chip which drove 2 desktop speakers and
a sit-on-the-floor subwoofer. USB drivers are no longer available.
I'd like to make these work again by connecting the audio-out jack from the
computer to the appropriate points on the Soundsticks' PCB.
The main component on the PCB is the amplifier:
<http://oi55.tinypic.com/egrdyg.jpg>
My question is basic: how do I connect to both stereo inputs (inputs 1 and 2)
and at the same time connect to the subwoofer input (inputs 3 and 4)?
I presume the answer is a simple resistor network mixing the 2 signals for
input to 3/4?
And yes, there's filter networks there, too, and it is important to know the
appropriate "injection" point, which will take some time.
Thanks,
Dave
They originally took digital audio via USB output from the computer and fed
it to a multi-channel audio amplifier chip which drove 2 desktop speakers and
a sit-on-the-floor subwoofer. USB drivers are no longer available.
I'd like to make these work again by connecting the audio-out jack from the
computer to the appropriate points on the Soundsticks' PCB.
The main component on the PCB is the amplifier:
<http://oi55.tinypic.com/egrdyg.jpg>
My question is basic: how do I connect to both stereo inputs (inputs 1 and 2)
and at the same time connect to the subwoofer input (inputs 3 and 4)?
I presume the answer is a simple resistor network mixing the 2 signals for
input to 3/4?
And yes, there's filter networks there, too, and it is important to know the
appropriate "injection" point, which will take some time.
Thanks,
Dave
