Hey there guys!
I've gotton two Monacor SP385G very cheap, and would like to build two PA speakers with them. It is going to be for portable use for festivals so it will not have to be 100 % Hifi correct 🙂
To assist them i've planned to buy these tweeters High Freqency Hi Fi Silk dome tweeter from QTX Sound 7.91
Any problems with that?
So my Q here is how to make a fine crossover for the speakers. The woofer goes up to 96db and fades of at 3,5khz. The tweeters starts at about 1,5Khz.
Hope someone will help me out on this one 😉
I've gotton two Monacor SP385G very cheap, and would like to build two PA speakers with them. It is going to be for portable use for festivals so it will not have to be 100 % Hifi correct 🙂
To assist them i've planned to buy these tweeters High Freqency Hi Fi Silk dome tweeter from QTX Sound 7.91
Any problems with that?
So my Q here is how to make a fine crossover for the speakers. The woofer goes up to 96db and fades of at 3,5khz. The tweeters starts at about 1,5Khz.
Hope someone will help me out on this one 😉
Those are high efficiency PA speakers, my friend. I really don't know how they will sound at higher frequencies, but fairly harsh I'd think.
You should probably be looking at an Eminence horn tweeter here. A hifi soft dome will probably last about 2 minutes at PA volume.
You should probably be looking at an Eminence horn tweeter here. A hifi soft dome will probably last about 2 minutes at PA volume.
thanks for the quick reply.
It was actually one of the diy experts who send me the link to those tweeters. I had the same thought as you to be honest.
How low do think i could go with those woofers? i really want to be able to make something with them as i would save a pretty huge amount of money 😉
It was actually one of the diy experts who send me the link to those tweeters. I had the same thought as you to be honest.
How low do think i could go with those woofers? i really want to be able to make something with them as i would save a pretty huge amount of money 😉
I did have a go at a PA speaker many years ago using a Goodmans 12" bass/mid driver with a metal dustcap like yours, and a bullet tweeter.
It sounded lousy without any filtering on the bass and just a capacitor on the tweeter. How low your woofer will go probably depends on the size and design of the box, along with the parameters of the woofer. All I know is it's 8 ohms nominal.
Presumably PA speaker companies like Eminence and Celestion offer some sort of standard filter for a 15" bass and horn, along with cabinet advice. I would dig around their sites for help here. This is not something I've ever closely looked into. 😱
It sounded lousy without any filtering on the bass and just a capacitor on the tweeter. How low your woofer will go probably depends on the size and design of the box, along with the parameters of the woofer. All I know is it's 8 ohms nominal.
Presumably PA speaker companies like Eminence and Celestion offer some sort of standard filter for a 15" bass and horn, along with cabinet advice. I would dig around their sites for help here. This is not something I've ever closely looked into. 😱
I made a mistake before. I shoul've asked how high you would think it could go. Where to make the horn/tweeter take over. 😉
Again, thanks for writing 😉
Again, thanks for writing 😉
Here is what someone in Poland did with the SP-385G:
WYCENA kolumny SP-385G + 2 x gdwt tonsi - elektroda.pl
He used two horn tweeters per box:
https://www.e-tonsil.pl/index.php?p92,gdwt-9-80
WYCENA kolumny SP-385G + 2 x gdwt tonsi - elektroda.pl
He used two horn tweeters per box:
https://www.e-tonsil.pl/index.php?p92,gdwt-9-80
thanks for posting! A little surprised he used two as the sensivity of the horns/tweeters he used is over 100dB and the woofer is 96 😱 But seems like he has made the crossoverfrequency at 2khz 🙂
A crossover closer to 1 kHz certainly would be better for a 15" woofer. I'm not familiar with PA tweeters, but 2 kHz is probably more realistic.
Attached a simulation of the woofer in a 104 liter vented cabinet with a basic crossover at 2 kHz. Not 100 % Hifi correct, but it works. 🙂
Attached a simulation of the woofer in a 104 liter vented cabinet with a basic crossover at 2 kHz. Not 100 % Hifi correct, but it works. 🙂
Attachments
Thanks alot! I might try to fine af tweeter that goes closer to 1khz or at least 1,5khz 😉
Lets say i find one that goes to 1khz. What values should the crossover parts have then? With 1,5khz it i would imagin it would be in between 😉
The tweeter/horn wont require any crossover? 🙂
Thx, for your time
Lets say i find one that goes to 1khz. What values should the crossover parts have then? With 1,5khz it i would imagin it would be in between 😉
The tweeter/horn wont require any crossover? 🙂
Thx, for your time
Firstly, let's say we are not PA experts here. 🙂
I'd trust Dissi with his bass filter there though. I would be thinking something between 1.5 and 2kHz is the right crossover point too.
Eminence make off the shelf filters for 12" and horn. They are a bit more clever than you might expect, having a light bulb protection circuit for the horn. And the horn DOES need a filter.
Crossovers | Eminence Speaker
I see a 1.6kHz filter there. 🙂
I'd trust Dissi with his bass filter there though. I would be thinking something between 1.5 and 2kHz is the right crossover point too.
Eminence make off the shelf filters for 12" and horn. They are a bit more clever than you might expect, having a light bulb protection circuit for the horn. And the horn DOES need a filter.
Crossovers | Eminence Speaker
I see a 1.6kHz filter there. 🙂
Last edited:
Thanks! I might find a tweeter that goes down between 1,5 and 2 khz. Then i'll see if i can find a premade PA-filter. for example one from eminence Eminence PXB2-1K6 45.76 They write it will work with most 15" and 12" speakers.
Might be a little expensive but it should work. My best option would still be, to make a crossover my self as it is the cheapest way
Last edited:
Hey again guys.
EV Weiche SX100, SX200 - Thomann Danmark
this is the crossover for the electro voice sx100 and sx200. Their crossover frequency is @ 1,5khz and the speakers are also 8 ohm. Would it be wrong the use these instead of one from eminence? These are quite alot cheaper than those from eminence so it would help alot.
they are using this driver in the sx200 http://www.reparationhautsparleurs.com/pdfs/DH2010A.pdf
EV Weiche SX100, SX200 - Thomann Danmark
this is the crossover for the electro voice sx100 and sx200. Their crossover frequency is @ 1,5khz and the speakers are also 8 ohm. Would it be wrong the use these instead of one from eminence? These are quite alot cheaper than those from eminence so it would help alot.
they are using this driver in the sx200 http://www.reparationhautsparleurs.com/pdfs/DH2010A.pdf
Last edited:
- Status
- Not open for further replies.