Think of them as a TV soundbar or boom box, with manipulation they can be made to sound quite good, but are no substitute for a quality external speaker system if you are after accurate sound.
BTW: If you are setting up for recording it is better to use quality headphones to remove room & speaker box effects.

Bill
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English Riviera:
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (I�m definitely staying put).