Fig.1 – The stereo version of the phase shifter
As declared on the last post, I have published a very recent project, built after the andy-progetti website’s birth.
This circuitry is an elementary phase shifter but I think it represents the best solution for bridging two amplifiers. I don’t know if you already know the theory of bridged amplifiers, otherwise, on the Wikipedia’s website, you can find the main information about it.
Fig.1 – The audio power amplifier with LM3886
By using the LM3886 it is possible to build a very small PCB but with the performance of the more complex and expensive commercial power audio amplifiers. Of course I’m not comparing this amplifier with some super ones available in the market, but you’ll remain amazingly surprised listening to how good it sounds.
The basic configuration suggested by the LM3886‘s data sheet works well already but it is possible to change something to make it sound better. For instance adding a few extra components to filter the signals more carefully, or, since a handful of components are necessary, it might be worth spending a little more money to buy some high quality ones.