Sanity check: Bad Sub ? (REW Sweep results)

[lovinthehd]

Yeah, though trying combinations of speaker settings AND combinations of positions is difficult, so I was measuring at the sweet spot seat.

I think I'm done for now, at least until I decide if I am going to buy Dirac Live. Or I guess Multeq-x, but DL seems more appreciated generally?

Anyway, it was a useful exercise. I found two rattles around 50-70hz, one a foot on the Q11 I had not tightened, and the little sub has hard feet on a hard floor, and literally was vibrating up on one or more feet and clacking.

From that position this is the combined subs sweep going through Audyssey (I was surprised, it tested each sub individually when it ran, this is the in-AVR versinon). Much flatter than I started. Not flat, but better.

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I'm not sure if this is a valid test or not, but it's a stereo only output sent to it thru L+R with multi-channel on (which I think does a lot of processing to split it up and send it to various speakers). Not sure if it's good or bad, but it's also kind of sort of flat-ish for all 7 speakers combined.
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Probably more importantly I played some movie clips with interesting sounds (like the first Stranger Things opening at the elevator, or various pieces from Star Trek's (Chris Pine versions). They all sounded good, and I think better than before I started messing around with it.

Whether someone with better ears, and more experience, would think it horrible or fair I don't know. But I have old ears and little experience and I'm happy so far.

You may be overthinking things . There's reference, then there's preference. Might check this out in any case https://www.audiosciencereview.com/forum/index.php?threads/the-moving-microphone-method-mmm-for-dummies-using-rew.51333/

 

[Linwood]

I hate YouTube videos, mostly because I hate video vs text based information. Too many videos are people rambling, repeating things from other people, or in one I watched last night reading off a ChatGPT summary of a topic. Information rate low, not searchable... I hate videos.....

All that said, most topics seem only covered there, so I've been watching them a lot, and I finally hit one that taught me a LOT on this subject, and makes sense out of some comments people made. For anyone else confused on bass and subs I recommend this:

It's LONG (90 minutes) but very amenable to playing at 1.25x or 1.5x, but has a good thorough discussion on room size, standing waves, and why bass is a different problem than all the other frequencies.

So off to think about this and take a few more measurements, but at least I understand better those weird, extreme dips that started this discussion.

 

[everettT]

I hate YouTube videos, mostly because I hate video vs text based information. Too many videos are people rambling, repeating things from other people, or in one I watched last night reading off a ChatGPT summary of a topic. Information rate low, not searchable... I hate videos.....

All that said, most topics seem only covered there, so I've been watching them a lot, and I finally hit one that taught me a LOT on this subject, and makes sense out of some comments people made. For anyone else confused on bass and subs I recommend this:

It's LONG (90 minutes) but very amenable to playing at 1.25x or 1.5x, but has a good thorough discussion on room size, standing waves, and why bass is a different problem than all the other frequencies.

So off to think about this and take a few more measurements, but at least I understand better those weird, extreme dips that started this discussion.

It took me close to 20 years to come to a good understanding of the room and bass, I was just too busy listening to music. It wasn't till the of advent lfe, that I actually started paying attention. I really missed out on a lot during those years because I thought having great gear was the only solution and it wasn't until I started reading Toole and Linkwitz did I really start to become educated. I as I stated I was just enjoying the music but Toole changed my outlook on that and I highly recommend your wife buy you his 4th edition of his book for Christmas