I thought Clark Johnson wrote the Wood Effect.
Most recording engineers are unconcerned with polarity. As a result roughly half of all recordings are incorrect. You will want a switch to do the job- getting up to change the speaker cables can get to be rather a pain :)
If you are listening to multi-tracked recordings it may make no difference, as tracks get inverted going through effects loops and the like, so its one jumble for another. But if it is a pure recording (2 or 3 mic true stereo) the difference can be quite notable.
Most recording engineers are unconcerned with polarity. As a result roughly half of all recordings are incorrect. You will want a switch to do the job- getting up to change the speaker cables can get to be rather a pain :)
If you are listening to multi-tracked recordings it may make no difference, as tracks get inverted going through effects loops and the like, so its one jumble for another. But if it is a pure recording (2 or 3 mic true stereo) the difference can be quite notable.