BillFitzmaurice.info

You can research this, but in summary THX is a standardized spec for an entire assemblage of home theater equipment and techniques spanning from recording all the way up to and including the playback environment. In this instance the speakers and listening space don’t align to the spec, so using an...

If I select THX crossover setting in the MC-8 processor, it sets all speakers to 80hz. So all speakers above the 80hz and sub below 80hz, the Lexicon takes care of the crossover transition right? With a overlap, which is normal. No. Don't do that. It's not applicable because the system is not a THX...

...a few posts back I stated that the wooly sound is practically gone when I set the EQ on bypass. I think by the answer I got, that there was too much EQ corrections. And before that, the subs was out of fase with the main speakers, causing a muddy sound. But now it is better! I still leaves me wit...

From the MC-8 manual... "When a THX speaker setup is selected, the MC-8 applies a THX 80Hz crossover point with a 12dB-per-octave filter to the Front L/R, Center, Side L/R and Rear L/R output connectors. The MC-8 applies a THX 80Hz crossover point with a 24dB-per-octave filter to the Subwoofer ...

If I select THX crossover setting in the MC-8 processor, it sets all speakers to 80hz. So all speakers above the 80hz and sub below 80hz, the Lexicon takes care of the crossover transition right? With a overlap, which is normal.

Yes, every speaker is high passed at 80hz. I have set them in the Lexicon MC8 surround processor, so I don't know what slope it is using.

The sub is crossed over at 80hz. And by wooly I mean kinda muddy, lacking definition and tightness. Before I had the sub out of fase and with EQ, it was terrible. The dynamics of the whole sound was gone.

Bruce Weldy wrote: ↑Wed Jul 26, 2023 3:16 pm

Jan-Kees wrote: ↑Wed Jul 26, 2023 2:08 pm it's woolly sounding.

Sounds like an EQ issue.

Can you explain what you mean by that? Because I have set the EQ on bypass now, and the woolly sound is practically gone. Did I have too much EQ corrections?

On a good day I will test the sub in the back and do new measurements. But my wife never gonna except a big sub like the Tuba HT there. :? So I'm already looking for other solutions. Will it make any sense and difference to put the smallest Table Tuba in the back corner or next to the listening posi...

Okey, I did new measurements on different distances from the back wall. Red is 30 cm from back wall, green is 60 cm from back wall. Purple is the current listening position at 2,27m. I have to say there is a window in the back wall, like 17cm deeper then the wall itself, the measurements are from th...

The mouth of the sub is also about the same distance from the side wall. It would be worth flipping it end to end and testing again too, even if it means it's behind the baffle wall. Well, I had the sub flipped as a starting point, but the position where it is now is giving a slightly flatter respo...

Bill Fitzmaurice wrote: ↑Thu Jul 27, 2023 8:21 am I'd say that 2.25 meters to the wall behind the LP is the problem. Take a measurement with the mic 30cm from the wall.

Okey, I will take a measurement 30cm from back wall. But are you suggesting a listening position 30 cm from back wall?

This picture shows my situation. Not typical HT room, its a compromise... (it's one open space)

Well there is a boost from 130hz to 200hz from the La Scala's. And a big dip around 40hz from Tuba HT. Green lines with EQ in MiniDSP, not much different, which indicates standing waves...?. (All with 1/6 smoothing).

Well, my HT is my living room and kitchen, and I have a baffle wall now where all the front speakers are housed. The wall does good things for the speakers and bass, because it eliminates the indirect soundwaves. Before I was sitting in a nul, now that's not the case anymore. But I am talking about ...