Frequency curve of B&W 802 D2

[RFP]

On 09/07/2017 at 6:20 PM, satbox said:

Hi,

 

I'm looking for the frequency curve of the B&W 802 D2 speakers. Can you help me?

 

What I want to try is to reproduce this curve on my 802 D2 speakers using Acourate...

 

 

Should work fine but best not to beam the speakers directly at the listening position when running the initial measurements for dsp correction. The so-called nasty peak at 3.5kHz isn't actually too nasty and in fact doesn't exist at all at > 30 degrees off axis. If you beam each speaker 20 degrees out from the listening position it should be optimum for the dsp correction.  Also, at that angle the so-called large plateau between 7 and 15kHz doesn't exist to any extent on the listening axis, and in most rooms the treble balance is pretty much spot on. In my own room, the response is essentially flat above 1kHz at the listening position. 

 

[RFP]

On 24/07/2017 at 7:20 PM, semente said:

 

Am I right to assume that you are posting an in-room frequency plot?

How much smoothing did you use?

Besides, the vertical scale in your plot is too wide to be of any relevance (and it's obviously flattering), can you upload one with a 50dB span?

 

Yes, it as in-room at approx 3m from the speakers and 1/6 smoothing was used. 

 

If you click on the chart you will see that there's 5dB per division on the vertical axis. Above 1kHz the response is within a 3dB envelope which is excellent - regardless of how it's charted. 

 

The main point is that correction is best done  at the listening position and with both speakers set with optimum toe-in, which is 20-30 degrees off axis to the listener. Trying to correct the nearfield response on tweeter axis will not provide the flattest in-room response.