Hello all, Is it safe to crossover a 17cm driver at 3khz, 3000hz to a tweeter? I wanted to build the SB ACOUSTICS ARYA, but am uncomfortable with the 3khz crossover to the tweeter. All comments welcomed.
The response graph in the SB Arya download looks fine.
I am guessing the designer found that the behaviour of the polypropylene cone allowed him to cross a little bit higher than the often seen 2 -2.5Khz. Go back thirty odd years an people were crossing 8 inch drivers over at 3Khz and beyond.
If you build them you and you are unhappy with the sound you should be able to modify them for a lower Xover frequency, but you will need new components, measuring and listening to finalise.
I am guessing the designer found that the behaviour of the polypropylene cone allowed him to cross a little bit higher than the often seen 2 -2.5Khz. Go back thirty odd years an people were crossing 8 inch drivers over at 3Khz and beyond.
If you build them you and you are unhappy with the sound you should be able to modify them for a lower Xover frequency, but you will need new components, measuring and listening to finalise.
Hi,
Checked SB17MFC35 on hi fi compass. From waterfall plot it's apparent this driver shows cone or similar resonances at about 4 kHz. For best results cross over should be at least 1 octave below that, i.e 2 kHz and not less than 12 dB/oct, preferably higher.
So best results IMO would be achived by finding a tweeter that is happy to play low into 2 kHz and crossing it here.
Regards
Checked SB17MFC35 on hi fi compass. From waterfall plot it's apparent this driver shows cone or similar resonances at about 4 kHz. For best results cross over should be at least 1 octave below that, i.e 2 kHz and not less than 12 dB/oct, preferably higher.
So best results IMO would be achived by finding a tweeter that is happy to play low into 2 kHz and crossing it here.
Regards
Depends what you mean by 'safe'. No harm will come to the drivers because of the 3kHz crossover. In fact, the tweeter will be better protected crossing at 3kHz than lower.
There are two issues, though. One is the breakup at 4-6 kHz, as Bakukaz has mentioned. This is a concern. However one version of Joe Rasmussen's Elsinore speakers uses these drivers with a high 1st order crossover point, anf they seem to be well liked by those who've heard them. Everything's a compromise. The second issue is directivity - the SB17 will beam a little by 3 kHz.
But if you lower the crossover point there'll be downsides to that too. At the end of the day, SB wouldn't be promoting this kit if they didn't think it worked well.
There are two issues, though. One is the breakup at 4-6 kHz, as Bakukaz has mentioned. This is a concern. However one version of Joe Rasmussen's Elsinore speakers uses these drivers with a high 1st order crossover point, anf they seem to be well liked by those who've heard them. Everything's a compromise. The second issue is directivity - the SB17 will beam a little by 3 kHz.
But if you lower the crossover point there'll be downsides to that too. At the end of the day, SB wouldn't be promoting this kit if they didn't think it worked well.