Bass Delay

[larry7995]

When I listen to certain techno albums for instance Tiesto - In Search of Sunrise 6, and I crank it up pretty loud, the drum beat seems delayed from the rest of the sounds. It even happens when I just have my mains playing without a subwoofer. Is it because they can't respond quickly enough to that type of electronic music or is it because its bouncing around on the walls due to no treatment? Or maybe my amp doesn't respond quickly enough? Anyone else ever experience that phenomenon?

 

[croseiv]

It almost sounds like a phase issue. It could be a reverberation like you say too though. Or perhaps it's the recording? Have you noitced it on any other system?

 

[larry7995]

I think it's echo off the back wall. Because I was just sitting in my lazboy listening again and when I was reclined it was very evident but when I leaned forward towards the speakers, it went away.

 

[croseiv]

Maybe some acoustic treatments could held there?

 

[larry7995]

Yes, I think I will have to take the closet doors off, paint the inside of the closet and put in some acoustic panels. But not today! I am taking the dogs and a favorite female up hiking to a mountain lake in the Big Horn mountains!

 

[Adam]

Enjoy your hike! Perhaps you could post again if/when you get those panels put up and let us know how they work out for you. Thanks.

 

[croseiv]

a sealed smaller driver will be faster and tighter.

Myth my friend...

Please read

"One of the biggest myths about woofers is that 8’s and 10’s are “tighter” and “cleaner” than 15’s or 18’s. Nothing is further from the truth. What tends to happen is that the smaller drivers have lower Q’s because manufactures tend to put large cones on smaller motors to increase SPL and sensitivity but not BL product. Well unless the motor can compensate for the extra mass it has to push, then the Qts will not be the same as the smaller drivers and ultimately the driver may not be suited for the same kinds of alignments and could ring too much and compromise the perceived sound quality. Having said that, high Qts drivers are not any less “tight” or “musical” than well dampened drivers, it’s just they require larger boxes and less internal pressure to prevent ringing. Ultimately there becomes a point where a driver really should be used in an infinite baffle where its actual Qts and Fs becomes the system Qtc and Fc. As enclosure volume decreases, Qtc increases and it will take a driver with a low Qts to make for an average Q system. So in conclusion, the only reason to use a smaller bass driver is for space, weight and potentially power considerations..."

 

[larry7995]

ya the punchy drum sound of techno, sort of hard to describe it with a word but that was bouncing off my closet doors and hitting my ears just after the speaker created it, so I just unscrewed the sliding doors and took them down, problem is gone. I did notice my jbl sub was also slightly out of synch with my mains, I fiddled with the distance and set the mains at 2.5 meters and the sub at 3.4 meters and it seemed to synch it up a little (at least I think it did), you guys may know if that is realistic or not, I recall reading something from Mark Seaton about doing that and thought I would give it a shot, all three speakers are physically at 2.5 meters from my lazboy vantage point

interesting aside about the hike, when we got to the lake today and looked around there were only two dogs instead of three so after a bit we hiked the hour back to the trailhead and there was dog number three chilling out under the truck he is approaching 13 and decided enough was enough, pretty smart old husky/shepherd

 

[mtrycrafts]

I think it's echo off the back wall. Because I was just sitting in my lazboy listening again and when I was reclined it was very evident but when I leaned forward towards the speakers, it went away.

It is not an echo but the nulls and peaks created by the room dimensions and the frequency played. And, yes, what you heard is a classic sign, observable.
Room treatment, sub EQ, perhaps multiple subs and listening from one location is the answer.