500 Hz and above is not an ideal place to put an XO so you'd be swapping one problem for another.
dave
Ideally I'd place the xo at 150Hz or lower. I know this is not optimal for the B80 but then... I'm sure the THD won't make me deaf 
I've never listened to any high quality speakers... Only cheap ones like the usual Philips spares etc. I did plugin Visaton FR10 8Ohms into myref and the image and stage was awesome. Just that it's rated at 30W max and 86db. Any options other than B80 that are better yet in the same price segment? I'll have to import any of these so price matters somewhat.
Any links to the CSD/THD measurements?
I've never listened to any high quality speakers... Only cheap ones like the usual Philips spares etc. I did plugin Visaton FR10 8Ohms into myref and the image and stage was awesome. Just that it's rated at 30W max and 86db. Any options other than B80 that are better yet in the same price segment? I'll have to import any of these so price matters somewhat.
Any links to the CSD/THD measurements?
What is problem with 500Hz XO?
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It will not make you deaf .. but will make a great driver play below average.. also, instead of flat 87 you'll get not so flat 83dB..Ideally I'd place the xo at 150Hz or lower. I know this is not optimal for the B80 but then... I'm sure the THD won't make me deaf
You got all the measurements posted earlier in this topic..
It's an XO (XOs are evil) and it is getting up into the critical band where they are easier to hear. I don't like XOs above 300-400 Hz.
dave
The fact that someone does not like XO above 300-400Hz is no argument .. for a moment I thought I would heard something bright..
I've presented several reasons why the cut was made at 500Hz..
MKT capacitor are used for AL170, and MKP for B80..
All coils are on air.. with a thick wire can be achieved low resistance..
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vulejov: Here's the bright thing that you wanted to hear: BiAmp (Bi-Amplification - Not Quite Magic, But Close) - Part 2
The relevant sections are "Crossover Frequency Selection", "Ideal Crossover Frequencies" and see the "Conclusion" if you are in a hurry.
There's a part-I of this article also but I doub't if it is relevant in this context.
The relevant sections are "Crossover Frequency Selection", "Ideal Crossover Frequencies" and see the "Conclusion" if you are in a hurry.
There's a part-I of this article also but I doub't if it is relevant in this context.
You missed the bit about above this being in the critical telephone band -- you get the distortions from the XO in that critical band ... and ideally at any XO point the centre-centre driver distance should be less than a quarter wavelength. Lower XO means that is more likely to be realizable
dave
Distorsions from XO are negligible in comparison with distorsion from B80 below 500Hz..
..This means that a suitable midrange driver must be capable of reproducing from 150Hz to 6kHz with good efficiency and without significant colouration..
..Many otherwise fine midrange drivers do not provide a wide enough safety margin below their recommended minimum crossover frequency, which causes resonances and other effects to colour the sound..
..'ideal compromise' will be different for every loudspeaker combination available..
If you use Visaton B80 with bass helper ideal compromise will be 500Hz..
You are awfully stuck on measured distortion....
It is all about tradeoffs. I choose a different set.
dave
I listened couple of months B80 as a fullrange and I know very well how sounds bass from a small driver.. exactly as indicates CSD and THD measurements..
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