Chris Paulson-Ellis wrote:

Hello,

I'm considering buying a Teac 300DAB mini system, but keeping my old
Morduant Short MS3.30 speakers. The specs of the amp (AH-300MkII) say
"45W + 45W (6 1/2, 1kHz, 0.5% THD)". This means little to me, but I
guess that the 6.5 is the impedance, so the amp can do something like
35W RMS per channel to my 8ohm speakers.

Is this enough power?

It should be enough power.
Make sure you don't compare the Mordaunts to any decent speakers. :-)

--
Eiron.