VinBaxter wrote: I would really like to repair this one or buy an SW10 model instead.
Comparable quality makes no sense.
ilhanamishev wrote: m sub works great but turns on when it wants to. There is no connection button indication when connected. Sometimes it starts the first time, but sometimes I unplug the cable 300 times and it still doesn't work.
This is a completely different damage, it does not concern the power supply itself, but the part of the electronics responsible for the auto switching on of the subwoofer.
VinBaxter wrote: Mine was damaged after a power outage. It seems that these boards are very sensitive to current.
Often, when switching back on, there is an overvoltage in the network, which the semiconductor elements cannot withstand (overvoltages causing transients in the devices themselves). Power supplies are made depending on the region for the supply voltage of 230-240V and 110-115V. Unfortunately, when powered from 110-115V, the elements of the power supply are "heavier" because the currents are twice as large for the same power consumed. So a momentary overload can be permanently harmful to them.
In general, switched-mode power supplies in subwoofers have a general tendency to fail due to heavy loads and long-term operation of the device.
Fortunately, their repair is fully possible.
Added after 8 [minutes]: Beretti wrote: I am afraid that it's a manufacturing defect and it will repeat itself. I think my case is from a neighbor's photovoltaic and 253 volt ..
It's either a manufacturing defect or overvoltage, make up your mind?
In my experience, it's neither, because these power supplies work well even up to 260V (checked from an autotransformer). The problem, however, is the deformed network and overvoltages in it. For users with three-stage overvoltage protection, the power supplies work for many years without failure.
The second problem is placing the subwoofer in the wrong place, close to window openings, balconies, in sunny places or with variable humidity (drafts).
