Hi
I've got an old Logitech "Z Cinema model: 980-000085) and despite the cheap looks it appears to be fully active system.
There´s separate amps for tweeters (AB?), mid/lows (TDA8920) and sub (TDA8922).
Its born with and USB-interface and I would like to convert it to analog inputs.
The central ADC is 4-channel and I'm pretty sure thats 2 channels for sub and 2 channels for satellites.
I have not traced all circuits, but there is a PCB-section that look a lot like an active cross-over implemented with opamps.
I'm hoping that all cross-overs are implemented in HW, -and that DSP-functionality can be bypassed completely...
I would say that based on HW this system must have some potential, but it would be VERY helpfull to have complete schematics.
I've tried all my normal goto-sites for schematics and service-manuals with no luck.
Any ideas?
Kind regards TroelsM
I've got an old Logitech "Z Cinema model: 980-000085) and despite the cheap looks it appears to be fully active system.
There´s separate amps for tweeters (AB?), mid/lows (TDA8920) and sub (TDA8922).
Its born with and USB-interface and I would like to convert it to analog inputs.
The central ADC is 4-channel and I'm pretty sure thats 2 channels for sub and 2 channels for satellites.
I have not traced all circuits, but there is a PCB-section that look a lot like an active cross-over implemented with opamps.
I'm hoping that all cross-overs are implemented in HW, -and that DSP-functionality can be bypassed completely...
I would say that based on HW this system must have some potential, but it would be VERY helpfull to have complete schematics.
I've tried all my normal goto-sites for schematics and service-manuals with no luck.
Any ideas?
Kind regards TroelsM