Can you hear difference on few db?
I know that my current speakers is from 65hz to 23kHz +/- 3db but if my speakers were +/- 2db or even +/- 1db would you hear a difference? I kinda wonder if anything 3db or lower is basicly very flat response for speakers. I just don't know if you can hear the difference. I think only a machine can detect the difference right?
If you want to see a flat loudspeaker response curve...
check out the Mackie HR824 Mk2. These are feedback-controlled self-powered recording studio monitors, and not cheap at maybe $600 - $650 each. But they will go down to 37Hz, and with impact. Smoother is better.
The HR824 are not found at audio dealers. Think Music123, zZounds, Musician's Friend.