The general rule of thumb is that equipment undergoes a break-in -- true.
How it impacts the sound? You never know especially if you're auditioning them in different room or CES and you also never know this way if the speaker were broken-in or not.
Break-in helps out to adjust small and tiny imperfections but the foundation of a sound should be present out of box.
If you buy a new Lex GS430 there is no way some "broken-in" Honda Civic can outrun it neither from start nor on the long run.
How it impacts the sound? You never know especially if you're auditioning them in different room or CES and you also never know this way if the speaker were broken-in or not.
Break-in helps out to adjust small and tiny imperfections but the foundation of a sound should be present out of box.
If you buy a new Lex GS430 there is no way some "broken-in" Honda Civic can outrun it neither from start nor on the long run.