Erse crossover cutoff frequency?

rms1 · 5th January 2013, 06:02 PM

Hey diyaudio community. Joined your forum today because there's lots of good info here and I had a question.

I have been putting together a 3-way open baffle speaker set and decided to use Erse 500/4000Hz 12 dB Linkwitz-Riley 3-way crossovers ProZx three way. Received the crossovers yesterday and hooked them up to my speakers.

Question: It seemed like a large range of the music was coming from the 15" woofer. I ran some test frequencies and it it turns out there is a dB jump at just above 500Hz and doesn't really start to drop off until almost 2000Hz, not what I was looking for. Am I doing something wrong or is it the crossover?

Drivers: 15", 8" and 4" 8 ohm vintage alnico drivers that all sound on their own.

Thanks a bunch guys. BTW I just went and switched the woofer from the "w" to the "m" just to see if it was labeled wrong and it's not.

Inductor · 06:37 PM

Loudspeakers it's not like a Lego.
Without a properly designed crossover, just by chance, your chances of succeeding are slim.

Quote:

Am I doing something wrong or is it the crossover?

First make sure the crossover it's set for the 8 Ohm load.
Edit: I have to say that those type of crossovers are for pro drivers and not the classical 3-Way.

rms1 · 6th January 2013, 02:00 AM

Thanks for your response. I figured that the crossover would not be a perfect match but would suffice until I figured out a better situation. Maybe that is not the case.

Dissi · 6th January 2013, 10:56 AM

Quote:

Originally Posted by rms1

Question: It seemed like a large range of the music was coming from the 15" woofer. I ran some test frequencies and it it turns out there is a dB jump at just above 500Hz and doesn't really start to drop off until almost 2000Hz, not what I was looking for. Am I doing something wrong or is it the crossover?

It's the crossover. The woofer usually needs a very large coil in open baffle. For example, the Manzanita has a 20 mH inductor!

rms1 · 7th January 2013, 03:42 AM

Manzanita has some good designs for sure, thanks for bringing those up. A 20 mH inductor costs as much as the complete crossovers i got!

I was also looking at Lampizator and Quarter-wave designs. I'll figure it out eventually.

5th January 2013, 06:02 PM	#1
rms1 diyAudio Member Join Date: Jan 2013	Erse crossover cutoff frequency? Hey diyaudio community. Joined your forum today because there's lots of good info here and I had a question. I have been putting together a 3-way open baffle speaker set and decided to use Erse 500/4000Hz 12 dB Linkwitz-Riley 3-way crossovers ProZx three way. Received the crossovers yesterday and hooked them up to my speakers. Question: It seemed like a large range of the music was coming from the 15" woofer. I ran some test frequencies and it it turns out there is a dB jump at just above 500Hz and doesn't really start to drop off until almost 2000Hz, not what I was looking for. Am I doing something wrong or is it the crossover? Drivers: 15", 8" and 4" 8 ohm vintage alnico drivers that all sound on their own. Thanks a bunch guys. BTW I just went and switched the woofer from the "w" to the "m" just to see if it was labeled wrong and it's not.

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6th January 2013, 02:00 AM	#3
rms1 diyAudio Member Join Date: Jan 2013	Thanks for your response. I figured that the crossover would not be a perfect match but would suffice until I figured out a better situation. Maybe that is not the case.

7th January 2013, 03:42 AM	#5
rms1 diyAudio Member Join Date: Jan 2013	Manzanita has some good designs for sure, thanks for bringing those up. A 20 mH inductor costs as much as the complete crossovers i got! I was also looking at Lampizator and Quarter-wave designs. I'll figure it out eventually.