Hello, regarding the Microlab B77 Bluetooth stereo speakers, I would like to ask if it is worth to replace the SMPS which has +15V, 0V and -15V, with a toroidal transformer, a rectifier and some filter capacitors ? I was thinking about a 2x12V/100VA transformer, 2x4700uF/25V or 2x6800uF/25V filter capacitors and some 100nF/50V ceramic ones in parallel with the electrolytic capacitors...
To expand more. Modern switched mode power supplies, with propper filtering, are much less noisy than old linear power supplies
Also, I am interested in replacing all of the electrolytic and non polarised capacitors with some new ones, better quality than the original capacitors.
I don't have the schematic of the product, I will only open the case and find the capacitors and then order some new ones with same specs...
Many thanks in advance !
Why do you think replacing the existing parts, with new ones with the same specification will improve the design? If the new parts have the same specification, be it crap, or good, then it will have exactly the same performance!
If the filter capacitors in the switched mode power supply are underspecified (too higher ESR/lower value) then you want to replace them with better ones, although they're probably fine, so it won't make any difference. Caution should also be exercised, as often using lower ESR/higher value, filter capacitors can create more problems, than it solves.
LE: I don't know for sure if there is needed a voltage regulator for some components in the internal circuit ...
It's quite likely it will be designed to work off a regulated power supply. Using an unregulated power supply, will definitely result in poorer performance.