Do YOU have a flat frequency response in your room?

The most basic truth of audio for the last 30 years is listeners prefer a flat frequency response. You achieve that through getting the right speakers, in the right position, in the right room, and then use room treatments and DSP to dial it in. If you are posting questions about what gear to buy and have NOT measured your room and dialed it in to achieve a flat frequency response FIRST you are blowing cash not investing cash IMO. Have you measured the frequency response in your room yet and posted it?