I am surprised the BKs go that high. Their internal crossover range is 40-120Hz.
They do have an LFE input and go much higher without the crossover, like >250 Hz. Still didn't sound so good when crossed any higher than 150 Hz.
mounted so high requires two subs, not really subs anymore, and a lot of phase position efforts etc etc ... we are no longer in a 2+1 at 60-70hz on a pair of libraries etc
Yes.
I wouldn't want to be crossing over a sub to 200hz, no way. For music system I would say 80hz is limit.
And I absolutely disagree, based not on any theoretical Hi-Fi purist folklore but based on measurements and listening experience.
They are localized in space. That is not desirable. 60hz is kind of safe if you don't want to localize the position of a sub.
...
They cannot be perceived as one body if they are crossed so high. Directivity increases with frequency increase. The wavelength at 200hz is 1.7m and our ears can detect both amplitude and phase differences . Also, due to the steepness of the crossover slope, Subs will also play less loudly but they will play frequencies above 200hz. They cannot be in absolute phase and absolute amplitude match with the mains . A speaker is designed so its drivers produce coherent sound that is time aligned sound . That is not a guarantee with the subs especially crossing so high. Even Dirac will not be able to fully correct it
Why would you argue with me unless you had a pair of LS50 Meta, a pair of Lyngdorf BW-2 and a Lyngdorf TDAI-1020 and tried out my setup? Sorry, but this is the kind of Internet chatter that leads to nothing but confusion and false assumptions. What makes you think you know it better than me from the comfort of your sofa?
My own experiment results on this ( have tested one, two, three or four subs in 4000 dollar region with different dsp crossover slopes both in mono and stereo ) is that two stereo subwoofers placed very near or below the main speakers are always prefered .
If those stereo subwoofers are placed on the floor ( very bad because you will exite more room modes ) the crossover must be set below 80 Hz 24 dB/oct .
Much better sound from stereo subwoofers can be had if you have them on stands 50 cm above the floor .
Totally contradicts my own experiments, but maybe my subs are just too cheap to reveal these problems.
Lyngdorf boundary subwoofers are designed to be placed
in room corners ideally (and this actually helps with room modes, it doesn't make them worse).
Sorry, I’m a bit confused.
If I use all 3 RCA outs (L, R and Sub), with a sub crossover at say 80Hz, does room correction work all the way down to 20Hz on the sub, or does it only work on the main L&R RCAs?
This is currently on debate in this forum.
WiiM says it doesn't. Some users - including
@slartibartfast - say it does. The best theory so far for my taste is that the official iOS version of WiiM Home does not, but the current beta version for Android does. I don't have to the time to test this (on Android) since I have to argue about crossover frequencies with the Internet people.