TOPIC:

Hi all. After many hours optimizing dirac filters with a fine ajustsment on PEQ plugins, i get great results: open sound, pretty holografic and a well tamed bass (2 mains and 1 subwoofer).
But, when i start all chain (linear power supply for shd studio and for a subwoofer dac) self power main dac, a superb topping E90, and two Marantz amps for biamp......sound appears with a subtle muddy layer.....

Changing dirac presets to check with others patterns....a few minutes after i achieve that cristal sound....

Could be a thermal issue? Need any device on my sound chain time to warm?

That sounds a bit odd to me.

You could try measuring a frequency sweep in REW straight after switching everything on from cold and then another 30 minutes later without doing anything at all in between and seeing if there is any difference.

I don't notice any major sound in my own system when switched on from cold. (SHD feeding Bel Canto eVo 4 power amp and Power Sound Audio S1510 subwoofer).

I'd generally advise against making adjustments to a Dirac results using PEQ, particularly if you are new to Dirac. Instead you should focus on adjusting the target curve in Dirac to try to achieve what you are after. The reason is that adding PEQ after running Dirac will degrade the phase response from what Dirac has achieved.

Well, PEQ ajustment are so subtles ( 4 eq slots of +-1db each one only in sub channel) that's real progress to extract energy from it and get tigh bass and clear mids and high avoiding bass masking.

I use a harman curve augmente 4db on schoeder frequencies
My room is a damned cube (4.25m×4.27m×3.20m) plenty of nodes

finitol wrote:

Well, PEQ ajustment are so subtles ( 4 eq slots of +-1db each one only in sub channel) that's real progress to extract energy from it and get tigh bass and clear mids and high avoiding bass masking.

I would still encourage you to at least try making the changes using Dirac rather than PEQ.