Why does the audio industry like linear transformers so much over SMPS?

[egellings]

Didden's Silent Switcher is truly excellent, but more complex than a simple 78xx style linear Vreg for low power applications. Switchmode is best for high power settings where efficiency reigns supreme. For 78xx-sized applications, I'll still go with inexpensive integrated linear solutions and skip the radiated HF noise problem.

 

[mansr]

As for linear post regulation after a switcher, it's a mixed bag. Slow error amps in the regulators may not be able to follow the HF noise and correct it out, and the noise will ride right through them Yee-ha! style.

That's why you read the data sheets and choose parts that meet your requirements.

 

[egellings]

That is correct. And then validation must be done on any solution to be sure it really is meeting spec.