This time I've find a vintage Pioneer XL-L77 hi-fi in the dumpster.
Amplifier display is not working, and also the amplifier has a big bump on enclosure. So I decide to keep just the subwoofer and speaker.
The front speaker are not that good, they comes in a small plastic enclosure, and the speaker are 8W small speaker.
The Subwoofer looks pretty good, but it has speaker with damaged ring.
So, I've replaced both the rings with a couple a new foam based. To do this job I've clean the speaker and then glue the replacement with all purpose clear solvent based glue.
Another think I've done to the enclosure is to remove the adhesive grey paper. I prefer to have it painted like wood.
Then I've to do some woodwork to make the amplifier board fit on it, and to drill out holes and space for the amplifier interface.
The amplifier has line/in, bluetooth, mains voltage in, a volume, a bass level selector, and the output for the left and right speaker.
As amplifier board I've used a Creative Inspire T3030 board I've around. This board has a unusual connector. I don't have the board command interface for this, so I've to find the pinout and the way to add level and volume.
Luckily someone on the https://forum.allaboutcircuits.com forum has trace it out.
I've removed the connector and solder it to my panel case.
It was a bit of a pain to make it fit the Subwoofer box, but in the end I've managed to do it.
Final product looks good to me, and it will be a good replacement for my PC speaker.
Notes
- read risk disclaimer
- excuse my bad english