I am about to embark on my first project. at the moment i am reasearching everything i can find online. I have got one ?, Do u choose drivers based on a pre made crossover or choose drivers and make a crossover to suite.🙂 🙂 🙂
Choose drivers, built cabinet, make xover ... than listen, modify, listen, modify ecc.
That's all.
That's all.
Choose the speakers* first, then design/calculate a cabinet for the woofer(s) (with the T/S parameters published by the manufacturer or your own measurements), measure the response in the final cabinet and finally with enough information (impedance curve and frequency curve) you can design your cross-over. (Choosing cross-over frequency and order of the x-over)
*The speakers itself have to be chosen such a way that you can make the speaker work, thus not using 10" woofer with a 19mm tweeter.
*The speakers itself have to be chosen such a way that you can make the speaker work, thus not using 10" woofer with a 19mm tweeter.
Hi kvos,
Here's a related thread that may be of interest.
You can do this of course, but the right way for better results is to do it as LaMa explains.
Here's a related thread that may be of interest.
LaMa said:
Very true!!!! I currently have the worst of both worlds! I have a 10" driver that should be crossed over below 500Hz a dome mid that probably should be crossed over somewhere around 800Hz or a bit higher and a tweeter which fits ok with the range of the mid.
Add to this the fact that I have a pre built crossover (admittedly a better than average one) with ~500Hz and ~3500Hz xover frequencies and its amazing that my speakers sound even reasonable.
The biggest problem here is that even if I did modify the cross over there is a poor match between my woofer and mid, and no amount of tweaking will fix it. So make sure that you get drivers with enough of an overlap in useable freq response so that you have flexibility when tweaking your xovers (not that I have got to that stage yet, I've just learned what not to do 🙂 ).......
Oh and I broke the other golden rule of not attempting 3 way on your "first" project 😱 But hey they sounded better than anything my uni friends had 🙂
Regards,
Tony.
🙂 thanks for the replies guys. When i find my drivers i will post their specs , so i can get your feedback🙂
blank527 said:
Hi Remco,
Don't take my opinion as being in any way informed 🙂 but I would say you may not have a great match between the MID and the woofer. I don't know how low you can successfully cross the MDM55 (from the freq response plot I'd say 1000Hz would be as low as I'd want to go (in fact that may be too low), and the writeup on LDSG of the scan-speak recommends crossing over below 1000Hz.
http://ldsg.snippets.org/vendors/scan-spk.php3
I don't think that there would be a problem with the tweeter/mid combo, maybe cross them over about 4k or higher. I'm sure others will have much better suggestions than me, I'm just pulling numbers out of the air, not based on any real theory, apart from don't cross over too close to point where the driver starts rolling off (although I beleive this can be done successfully too, depending on the driver).
BTW I have not yet designed my own crossovers, I just have experience with speakers that aren't ideally matched and with completely unsuitable cross over freqs 🙂 (I've used a number of stock crossovers with varying crossover points with the same speakers and the differences were staggering to say the least!)
I've been having a really hard time deciding on a mid range, I really like the clarity and transparancy of a dome mid, but I'm looking at using a cone mid so that I can cross over at 300Hz or lower, hopefully avoiding any nastyness in the lower midrange.
Regards,
Tony.
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