Truths about subwoofer x-over

[haraldo]

Generally, I believe most people out here try to cross sub's as low as possible, and certainly below 80Hz....

Now Lyngdorf has the W210 subwoofers that they normally cross to main speakers at around 400Hz, sometimes as high as 650Hz. Even after reading all their tech stuff and trying to understand all of this there's no way I can see the reasoning behind this, and I can't even comprehend how it's possible to make a top notch speaker for the full range of 16Hz to 650Hz

Or how and why this is even desired....

http://www.lyngdorf.com/index.php?option=com_content&task=view&id=27&Itemid=55

Anybody out there that can provide some enlightenment on this?

Regards

-Harald

 

[Exit]

I think the highest crossover in my receiver is 250Hz. I've got it set to 80Hz but I was thinking of setting it up to 250Hz because my sub has frequency response up that high and I am not getting enough bass out of my main speakers because they are in an 8500 cubic feet great room, kitchen, halls etc. Just one angle on crossover points.

 

[TLS Guy]

Generally, I believe most people out here try to cross sub's as low as possible, and certainly below 80Hz....

Now Lyngdorf has the W210 subwoofers that they normally cross to main speakers at around 400Hz, sometimes as high as 650Hz. Even after reading all their tech stuff and trying to understand all of this there's no way I can see the reasoning behind this, and I can't even comprehend how it's possible to make a top notch speaker for the full range of 16Hz to 650Hz

Or how and why this is even desired....

http://www.lyngdorf.com/index.php?option=com_content&task=view&id=27&Itemid=55

Anybody out there that can provide some enlightenment on this?

Regards

-Harald

Element of truth in this, but execution hopeless.

So many speakers are not properly diffraction compensated and or have inadequate power handling in the region below 600 to 400 Hz depending on the speaker.

However you can not compensate for this problem with a woofer stuck in the corner! Also the shelving has to be unique to the speaker in question, and part of the speaker, not a distant box, with heaven knows what crossover!

 

[haraldo]

Robert Harley (of Absolute sound) claimed a while ago that these W210 corner loaded woofers coupled to an open baffle 2 way speaker all run by Lyngdorf TDAI 2200 amps with digital x-overs and roomperferct room-correction provided the best bass he ever heard....

I don't trust him and I don't trust what he writes, but still, there must be something to it, or not?

Perhaps he doesn't hear well, and he hasn't listened to yours or avaserfi's or WmAx's sub's......

Trouble is.... they have these systems around here but nowhere are they properly set up so it's impossible to even get a clue about how this performs, they sell them but don't have rooms to demo them in

 

[jliedeka]

Another problem is bass becomes directional over 100Hz. I start to really notice at 120Hz. If I wanted to cross over at those frequencies, I'd want at least two subs right next to may main speakers. Even then, integration may be tricky.

Jim

 

[Spkr_Bldr]

It's the height of the subs that would be a problem in this setup. With the Lyngdorf processing ... same as the TacT stuff I've used, you can put your subs a long physical distance away from the mains and have no problem time-aligning them. But If vocals and instruments are coming through a sub on the floor, it's going to pull the soundstage down and it will be easily noticable.

If the subs were on the same visual plane as the mains, and raised to a height close to the other drivers in the mains, it would work fine - the key being the processing that the Lyngdorf stuff is capable of. Still it seems like a silly way to go, if you mains are so hopeless that they need crossed that high, you're probably better of buying new mains.

 

[haraldo]

Another problem is bass becomes directional over 100Hz. I start to really notice at 120Hz. If I wanted to cross over at those frequencies, I'd want at least two subs right next to may main speakers. Even then, integration may be tricky.

Jim

Obviously, the Lyngdorf setup would require Stereo subs, or imaging wll be absolutely hopeless