Frequency response + or - 1 dB ??

@ptss 

It's a matter of preference and each recording itself has a different balance so the response of the speaker should be adjustable not fixed. But audiophiles dislike adding anything in the signal path. 

Would you please describe your current speaker syste, as well as any widely available commercial speaker you stan?

I don't have a current system. None that meet my standards can be found for a reasonable cost or perhaps even at any cost. 

The last speaker I had were called Green mountain audio chroma. However, they suffer from severe colorations which make them sound very cold. Additionally these speakers have zero baffle step compensation, in addition to poor bass response. There's no evidence they are time coherent either, only the manufacturers claim. 

Thanks to all for input.
My question is simple. 
Why is it obviously technically difficult for speaker designers to provide precisely level frequency response. @kenjit. I accept some listeners want to adjust the sound for different recordings. Old fashioned tone controls and modern equalizers provide that. 

@ptss - The simple answer is $$$. Mr. Dunlavy personally HAND TUNED every one of his speakers to achieve this tight tolerance. This tuning took into account the cross-over components AND the drivers in each cabinet. Doing custom tuning is not practical for anything other than a boutique enterprise. Why is it important to have tight tolerances? If you have a speaker with +/- 3db tolerance, you can have a 6db variance between frequencies coming out of your speaker. Is this important for realistic playback? You decide. Also, if speakers were made with +/- .5 db and music sounded funky in your room, you would know it's not the speakers causing the problem.