Hello, Like any computer amplified speakers , you can use any external passive speakers set (like your beautiful old 5feet vintage HiFi TEAC speakers that you don't use anymore) instead of internal ones. It is worth a try and non destructive since you don't short speakers output. Just unsolder original speakers and add a parrallel standard cable, trying to respect polarity to avoid sound dephasing, even more if it's a 2.1 system with subwoofer. You could be very surprised what just few watts can do with good sensitive speakers! ;)
As i can see it's the same D class amps used in my Altec IMT-800.
These devices are very powerfull and the sound quality is present for D class.
If someone have some schematic i would be very happy to have a look!
Altec construction is quite complicated but the case (for my IMT800) is VERY resistant.
I don't regret my 240Euro spent on it at all
Thanks