How much correction should one apply?

[krunk]

Recently I did another session of REW.
Until that moment, I had quite a flat respons, but was not overall happy. There was something missing.

When I started again, I tried something else.
In stead of solving almost every bump in the respons, I've applied some smoothing and only focussed on the big picture. Now I can manage with 3 correction filters, where I needed 6 before.

Also, I had some problems with the integration of the sub and the fronts. Seperately they where ok, but together I had a huge dip between 80 and 110 hz. I solved this by putting the sub (with is next to the fronts), 3 meters behind the fronts with the use of my processor (in a virtual way).

My impression is that there is better detail in the bass, overall a better sound.

What is your opinion about this?

Bart

[brucek]

I solved this by putting the sub (with is next to the fronts), 3 meters behind the fronts with the use of my processor (in a virtual way).

Yep, you're using time to solve a crossover cancellation. I see no problem with that.

In stead of solving almost every bump in the respons, I've applied some smoothing and only focussed on the big picture. Now I can manage with 3 correction filters, where I needed 6 before.

The theoretical rub with this is that if you use smoothing on low frequency measurements, the filters optimised against a smoothed response will have settings that don't accurately match the room's modes. The result may not reduce the decay times of room resonance as well. Have you done a comparison of waterfall graphs between the newer 3 filter results and the older 6 filter results. You can use the waterfall overlay feature to compare the two. Check for decay time differences.

brucek

[krunk]

brucek wrote:

Yep, you're using time to solve a crossover cancellation. I see no problem with that.

I thought that 3 meters of correction could be to much.

The theoretical rub with this is that if you use smoothing on low frequency measurements, the filters optimised against a smoothed response will have settings that don't accurately match the room's modes. The result may not reduce the decay times of room resonance as well. Have you done a comparison of waterfall graphs between the newer 3 filter results and the older 6 filter results. You can use the waterfall overlay feature to compare the two. Check for decay time differences.

brucek

I haven't done a comparison between the waterfalls. But when you apply basstraps, they also work in a wider range, and this works fine. That was my trigger to try this approache.

I'll try this to see what I'll end up with. Thnx.