Any info on Design Acoustics?

I'm certain they're not the sort of high-end speakers most folks here listen to but I thought someone might be able to tell me if they're considred to be of at least middling quality.

The ones I have are bookshelf speakers (PS-55) I know I didn't spend much money on them when I bought them in the early 90s but looking at them last night I was surprised that they sounded pretty good and the overall quality seemed to be at least better than the Sony bookshelfs I've got.

My plan is to use them with a mico stereo system to replace the powered speakers that came with my computer.

They sound pretty good to me and I know that's all that really matters but I'm just curious to find out if I may have actually made a good purchase back before the age of the internet when sales people were taking even more advantage of me than they do today.

Thanks for any help.