Hi...I'm trying to repair a pair of RCA speakers that was given to me because the woofer was literally "eaten" by the previous owner's dog. The tweeters are still intact. The speakers are rated at 6 ohms and I found a pair of 8 ohm woofers which fits directly.
I know this is not ideal and using a 8 ohm woofer on XO designed for 6 ohms will shift the woofer XO frequency up thus creating an overlap with the tweeter (pls correct me if I'm wrong on the shift direction).
The tweeter circuit has an L-pad so I was able to adjust down the tweeter volume trying to match the woofer. I'm definitely loosing some volume using 8 ohm woofer.
I traced out the schematic. The tweeter is 5 ohms. This speaker design doesn't seem to use common impedance drivers.
What kind of tweak would you recommend ? Should I mod the woofer circuit to lower the XO freq for the woofer ?
Also, I briefly took apart the tweeter (separate the voice coil from the magnet) and saw a piece of cotton sit inside the silk screen (kind of in the space between the silk screen and the magnet). I totally did not expect to see that and thinking the cotton will dampen the high frequency when the silk screen moves.
Thanks in advance.
I know this is not ideal and using a 8 ohm woofer on XO designed for 6 ohms will shift the woofer XO frequency up thus creating an overlap with the tweeter (pls correct me if I'm wrong on the shift direction).
The tweeter circuit has an L-pad so I was able to adjust down the tweeter volume trying to match the woofer. I'm definitely loosing some volume using 8 ohm woofer.
I traced out the schematic. The tweeter is 5 ohms. This speaker design doesn't seem to use common impedance drivers.
What kind of tweak would you recommend ? Should I mod the woofer circuit to lower the XO freq for the woofer ?
Also, I briefly took apart the tweeter (separate the voice coil from the magnet) and saw a piece of cotton sit inside the silk screen (kind of in the space between the silk screen and the magnet). I totally did not expect to see that and thinking the cotton will dampen the high frequency when the silk screen moves.
Thanks in advance.
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The best solution is measure speakers (eg in Speaker Workshop) and make new crossover network, it will be difficult to achieve good sound without it.
What I would do.
You are a beginner. (Meaning you are not using measurements/simulation tolls aka SPICE) Go to post #2.
If you are not using any tools like the ones I mentioned and you are not using driver FRD & ZMA files or any other appropriated method Simple Loudspeaker Design, then if only listening and using a time intensive method that is not fail proof, I would tell you to start a new project with new tweeters (and woofers drivers).
Now is up to you.
What route do you want to take?
#1 designing your system (existent) from ground up to a (new) final design.
You use as a starting point the tweeters the crossover, the enclosure.
#2 using your system to hear and test a new replica woofr that might or might not work.
What is the make and model of this driver?! and what the T/S parameters.
#3 Are you going to measure the internal volume (net) of the enclosure with full specs in the type of system, like measurements of ports when they exist, measurements of cut holes for drivers both tweeter and woofer, and using a new 2-Way system from another kit with new woofers, tweeters and crossovers...
As a last note many members make the wroeg assumption that a crossover can be used with any driver when is the opposite you have to make a new crossover for every different driver. Have a nice one.
You are a beginner. (Meaning you are not using measurements/simulation tolls aka SPICE) Go to post #2.
If you are not using any tools like the ones I mentioned and you are not using driver FRD & ZMA files or any other appropriated method Simple Loudspeaker Design, then if only listening and using a time intensive method that is not fail proof, I would tell you to start a new project with new tweeters (and woofers drivers).
Now is up to you.
What route do you want to take?
#1 designing your system (existent) from ground up to a (new) final design.
You use as a starting point the tweeters the crossover, the enclosure.
#2 using your system to hear and test a new replica woofr that might or might not work.
What is the make and model of this driver?! and what the T/S parameters.
#3 Are you going to measure the internal volume (net) of the enclosure with full specs in the type of system, like measurements of ports when they exist, measurements of cut holes for drivers both tweeter and woofer, and using a new 2-Way system from another kit with new woofers, tweeters and crossovers...
As a last note many members make the wroeg assumption that a crossover can be used with any driver when is the opposite you have to make a new crossover for every different driver. Have a nice one.
AC439,
I forget to say that there are many places in the US where you can repair your original woofer drivers. There are more, maybe in your region.
Just ask for a reconing. Have fun.
Replacement Diaphragms and Recone Kits. JBL, Peavey, Eminence, Beyma diaphragms and replacement baskets available here. Lots of diaphragms for JBL supertweeters and JBL drivers.
Speaker Parts - Speaker Reconing, Replacement Speakers, Speaker Repair Service
http://www.soundspeakerrepair.com/mm5/merchant.mvc?Screen=SFNT&Store_Code=SSR
I forget to say that there are many places in the US where you can repair your original woofer drivers. There are more, maybe in your region.
Just ask for a reconing. Have fun.
Replacement Diaphragms and Recone Kits. JBL, Peavey, Eminence, Beyma diaphragms and replacement baskets available here. Lots of diaphragms for JBL supertweeters and JBL drivers.
Speaker Parts - Speaker Reconing, Replacement Speakers, Speaker Repair Service
http://www.soundspeakerrepair.com/mm5/merchant.mvc?Screen=SFNT&Store_Code=SSR
Have the speaker repaired. This place does a great job and they aren't too expensive.
Speaker Repair Center at Parts Express 40,000+ speakers reconed ? get an instant price quote
Speaker Repair Center at Parts Express 40,000+ speakers reconed ? get an instant price quote
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