Recent content by Dox82

Hello, Today I tried to do a mesurement for a friend of mine using its setup with a USB UMIK-1 and a Tone Bone DAC connected to an Atom Unit. The "Check Levels" procedure is fine with an "In" dbFS of 43dbFS for 80dbC mesured with an SPL meter at the mic position. Unfortunately, doing a "Check...

@ddude003 yes the ekstra is a "weird" design defined as "2.5 Ways" with an isobaric section in the bottom of the cab. I was superficial in my initial description, this is not a "real" sub but effectively this cab is capable to go very low. It seems that the manufacturer does not state a clear...

Ok, basically the acoustic expert said what was assumed: I'm fighting agaist room modes until 80Hz and this is the main cause of peaks and residue hole. He say the modes are emphasized by the door (with some glass inside) and maybe by the speakers itself because the isobaric system at floor...

Yes, I'm waiting the "acoustic-expert final word" but a previous analysis showed a problem in the ceiling about the peaks cited by @John Mulcahy. Probably I'll have to use a tuned trap also for the 80-100Hz hole but I hope a final acoustic adjustment project will come in a couple of days...

@John Mulcahy the peaks in the bass range are well know and they are not removable with speakers and listening position changes (basically they depends on the ceiling) . Luckily the peaks can be well managed by the digital room correction. Anyway, I'm working to try to minimize this problem also...

I'll surely update the post when I'll get a response from the expert. They have my last mesurement...crossfingers...but I already know they are worried about the "boom" in the bass range (which is "easy" recoverable with room correction via sw), conversely I'm more worried about the "world...

Ok, there are surely a lot of interesting things to learn but I can't reasonably believe that the 80-100hz hole can be an amplifier<->speakers problem. I mean, I have a pair of neat ekstra with 6ohm of impedance with 86db of sensitivity (they are classic speakers not ELS), driven by a sudgen...

Ok, where is the graph you talking about? I think I have to do a specific impedance mesurement... In general I have no tube amplification, my amp is a Sudgen a21SE Signature and speakers are Neat Ekstra.

Hello, I don't know what you means but I can try to swap the speakers it the doubt is in the speaker functionality itself. Basically, I think I'm not able to interpret correctly the phase graph. I see there is a "huge" difference just around 100Hz but I'm not able to understand what this means...

Hello! After a lot of mesurements and movement of acoustic/not-acoustic elements in the room, I totally recovered the "hole" in the 130-150Hz! Apart the "boom" in the bass range 40-60Hz (I'm planning to add some additional traps for that in the ceiling), the main "holes" are in the ranges...

Hello, Yes this is my mesurement file in the current situation. If someone is able to generate some better filters impulse response in wav (I have to feed Roon) is really appreciated. I'm using the HarmanCurve attached as House Curve. In the current configuration there are no manual boost of...

As I experimenting, the dip at 60-80Hz is unavoidable, indipendently to the speakers/listener position.The RT under 80Hz increases from 0.8s to 1.5s at 60Hz and this surely the cause of the "boom" and the main "caos" in the bass range. I think this one can be cancelled using specific traps only...

Hello, I'm not boosting the nulls anymore. Unfortunately I don't know many things you talking about like house curve, math inversion, the time/distance and I'm not sure to really understand the room simulation info. Sorry, I have to study, many things are new for me. Probably I have to...

Another update: I found some pre-ringing in some tunes (I think this is a pre-ringing what I'm listening). This happens in a couple of tunes but there is. Basically I think this is do to the "Individual Max Boost" at 18db which is applied to some frequency. Lowering the "Individual Max Boost" to...

And now: 1. I advanced the listening position of 10cm. 2. I moved (again) the traps in the back not at 45° in the corner but more towards the center of the room (a little, the corner is ever covered). 3. I moved the first reflection panels more close to the speakers. The situation has...