Audiophiles hifi appreciation thread old and new

20W amp into 300W speakers? I'd probably not try that.

Always worked on that your amp should be bigger than your speakers. The idea behind that you'll be tempted to turn the amp all the way up, the amp will clip and you can get DC voltage across the speakers coils. This is a very bad thing and worse than overdriving the coil.

You might struggle to find modern 20W speakers in bookcase format but you could get some active speakers and use a line level output from the amp to power them.

Will be absolutley fine,

Wattage ratings in HiFi are an absolute joke.

99% of listening is done at 1W or less in typical room

The speaker rating of 300W is the MAXIMUM power they can (theoretically) handle (for very short - transient signals) measure using the infamous Peak Music Power Input

This is from a car audio site, but explains things reasonably well: http://www.bcae1.com/2ltlpwr.htm