There are many threads discussing the pros and cons of record clamping, but I think the general wisdom is that a clamp helps eliminate some of the micro-movement of the record, resulting in a more precise sound. I would put on a well-recorded solo piano or piano/bass and listen again. IMO, clamps and weights are tuning devices and I could see that, depending on one's system, someone might prefer the somewhat looser, more resonant sound without a clamp. Ask anyone who owns a Linn. If you can't hear the difference, so be it. Try it with some more records, but don't turn it into a source of grief.
