I have a pair of 710's. I would characterize them as not as resolving and detailed as modern speakers (I also have ProAc D-15's)of similar quality, but they do have that musicality that makes them very listenable. They are 4 ohm, so they need a powerful amp. Bass is fine if raised up on the stands (which are worth something if original). $250 would be fine if in 8 condition, but watch out for rotting surrounds and grilles that are frayed or torn. I am not familiar with the Polks you mention. If they have regular binding posts and a fuse they are likely a "newer" version - I have the old spring loaded type which I know are not ideal. I believe they will hold their value if you keep them in good condition.
3 responses Add your response