Okay, now im new to speaker building and i came across a set of custom built speakers which i happenned to listen to which sounded superbly amazing. it was at a friends place who was renting a room and the speakers belonged to the old grandpa who used to rent out his room. Grandpa passed on, RIP, the house in which the speakers were had its speakers unscrewed and the story is someone stole them. That grandpa's daughter put out a garage sale and i bought the the crossover and the speaker cabinet for 10 Dollars. the cabinet looks like its peeling apart. i pulled out and i took some photos of the crossover and it seems that its made with considerably expensive parts? although it looks shabbily hobbled together. someone kinda used a marker and hid the details of the inductor but i can still read the markings on the capacitor. its mundorf supreme silver/gold... sounds quite expensive. it looks very hand made diy. but i remember when i first listened to the speaker, it sounded really amazing. i could hear all the instruments clearly and the separation was amazing, wonderful sound stage too.
Now i would like to learn more about crossovers, and also get inputs on how to check what are the values for this crossover, and what type of tweeter and woofer should i match to this crossover? of course i understand the speakers need to match to the cabinet, but at this point, im willing to build/buy a new cabinet if needed, given the state of the current cabinet, old and peeling.
im unsure if the crossover was built for 4 ohm or 8 ohm. but i hope to learn how to check and find out. also not sure what the value of it is, the point of crossover, cause i vaguely understand that there is supposed to be some sort of matching of woofers and tweeters to the crossover values.
I have a Fosi Audio T20 Bluetooth Tube Amplifier Stereo 50w RMS x2@4 Ohm and it can drive 2 Ohm to 8 ohm.
once again im very thankful for any help i could get. i dont have much tools, i do have a multimeter. here are the pictures of the crossover.
Now i would like to learn more about crossovers, and also get inputs on how to check what are the values for this crossover, and what type of tweeter and woofer should i match to this crossover? of course i understand the speakers need to match to the cabinet, but at this point, im willing to build/buy a new cabinet if needed, given the state of the current cabinet, old and peeling.
im unsure if the crossover was built for 4 ohm or 8 ohm. but i hope to learn how to check and find out. also not sure what the value of it is, the point of crossover, cause i vaguely understand that there is supposed to be some sort of matching of woofers and tweeters to the crossover values.
I have a Fosi Audio T20 Bluetooth Tube Amplifier Stereo 50w RMS x2@4 Ohm and it can drive 2 Ohm to 8 ohm.
once again im very thankful for any help i could get. i dont have much tools, i do have a multimeter. here are the pictures of the crossover.
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The crossover looks to me to consist of a 2nd order high pass and a 1st order low pass:
The ceramic resistor is included to attenuate the tweeter and is likely situated in front of C2.
The coil in the photograph that is lying flat is the woofer coil, L1.
The ceramic resistor is included to attenuate the tweeter and is likely situated in front of C2.
The coil in the photograph that is lying flat is the woofer coil, L1.
To gain more information about the crossover, you would have to know, or need to measure, the inductance of each of the coils in mH.
To measure you would require the use of a multimeter that has an inductance scale.
To measure you would require the use of a multimeter that has an inductance scale.
If I were to take a WILD GUESS, I would plump for 8 ohm nominal drivers crossed over in the region of 4,000 Hz.
My guess is based solely on the value (3.3 uF) of the capacitor in the 2nd order high pass filter.
This would require L1 to be around half the value of L2, but I'm not sure the relative physical dimensions of the two inductors are in line with that.
I offer my guess simply as a basis for experimentation with budget drivers. I suggest you don't use this crossover with expensive ones.
Normally, of course, one would first select the drivers and then design a crossover to suit them - not the other way round!