I've got a pair of Advent Maestro speakers that were given to me today. They are in good condition and the woofers were refoamed a few years ago.
I already ordered new caps for the crossover.
Two things I've noticed.
1. The speaker wire terminals on both speakers has separated from the terminal cup with the crossover on it at the bottom. What should I use to secure it back down?
2. I've read where the woofer doesn't play high enough causing a hole in the frequency response near the crossover point of the woofer and midrange which is 900Hz. Listening to them, I believe I actually hear that, but will wait until the film caps come in and are installed to see if that fixes it. If I still hear the issue, what is the best way to eliminate the issue? Normally I'd just use a different inductor value for the woofer, but the inductor is part of the dish where the fuse, speaker terminals and other crossover components are and I'd have to add an inductor which would require mounting it somewhere in the cabinet.
What I should do is disconnect a midrange and test it using my DATS V3 speaker tester so I can see what the impedance of it is as in order for the 14uF cap value to be correct the midrange impedance would have to be 12.5 ohms provided the specs I found are correct. That's not exactly possible though given the speakers are at work now.
Specs of the speaker.
https://audio-database.com/ADVENT/speaker/a-1012.html
Also I will run these with a powered sub.
The response is +/- 3dB 42-23kHz
I currently have the powered sub crossover set to 40Hz, but am not that happy with it.
I can put two 160uF electrolytic caps in parallel to make a 320uF cap which based on the rated 6 ohms impedance of the speaker will give me a high pass of 82Hz.
I might try that tomorrow with the caps between the + speaker lead and + speaker terminal. If it sounds better then I may install the caps between the + speaker lead and woofer inductor (when i install the film caps) so that I don't run the risk of the caps affecting the midrange and treble.
EDIT:
Here's the crossover schematic I found.
However the response graph I found seems to suggest there is no hole in the frequency response.
I already ordered new caps for the crossover.
Two things I've noticed.
1. The speaker wire terminals on both speakers has separated from the terminal cup with the crossover on it at the bottom. What should I use to secure it back down?
2. I've read where the woofer doesn't play high enough causing a hole in the frequency response near the crossover point of the woofer and midrange which is 900Hz. Listening to them, I believe I actually hear that, but will wait until the film caps come in and are installed to see if that fixes it. If I still hear the issue, what is the best way to eliminate the issue? Normally I'd just use a different inductor value for the woofer, but the inductor is part of the dish where the fuse, speaker terminals and other crossover components are and I'd have to add an inductor which would require mounting it somewhere in the cabinet.
What I should do is disconnect a midrange and test it using my DATS V3 speaker tester so I can see what the impedance of it is as in order for the 14uF cap value to be correct the midrange impedance would have to be 12.5 ohms provided the specs I found are correct. That's not exactly possible though given the speakers are at work now.
Specs of the speaker.
https://audio-database.com/ADVENT/speaker/a-1012.html
Also I will run these with a powered sub.
The response is +/- 3dB 42-23kHz
I currently have the powered sub crossover set to 40Hz, but am not that happy with it.
I can put two 160uF electrolytic caps in parallel to make a 320uF cap which based on the rated 6 ohms impedance of the speaker will give me a high pass of 82Hz.
I might try that tomorrow with the caps between the + speaker lead and + speaker terminal. If it sounds better then I may install the caps between the + speaker lead and woofer inductor (when i install the film caps) so that I don't run the risk of the caps affecting the midrange and treble.
EDIT:
Here's the crossover schematic I found.
However the response graph I found seems to suggest there is no hole in the frequency response.
Last edited: