Hello, I'm trying to build a simple mono system on a budget. This far I have managed to find these parts quite cheaply:
Altec 416-8A
Altec 291-16A
and a Heathkit AS-101 crossover
The Heathkit AS-101 is supposed to be same as N800-8K that was ment for Altec Valencia speakers.
The N800-8K was designed for the valencia speakers and they use the Altec 416-8A with 806-8a compression driver. So both of the drivers where 8-ohms and I have a 8 ohm woofer and a 16 ohm compression driver now. I guess I could order a new 8 ohm diagram for the compression driver but since it seems original now I wouldn't want to spend extra on a new diagram now.
So my question is, would there be a simple way to mod the crossover so that it would work with the 16 ohm compression driver. Or is there even need or would it work as is with these drivers?
Heres the schematics:
Thanks!
Altec 416-8A
Altec 291-16A
and a Heathkit AS-101 crossover
The Heathkit AS-101 is supposed to be same as N800-8K that was ment for Altec Valencia speakers.
The N800-8K was designed for the valencia speakers and they use the Altec 416-8A with 806-8a compression driver. So both of the drivers where 8-ohms and I have a 8 ohm woofer and a 16 ohm compression driver now. I guess I could order a new 8 ohm diagram for the compression driver but since it seems original now I wouldn't want to spend extra on a new diagram now.
So my question is, would there be a simple way to mod the crossover so that it would work with the 16 ohm compression driver. Or is there even need or would it work as is with these drivers?
Heres the schematics:
Thanks!
Off the top of my head: the simplest solution would be to fit a 16 ohm resistor across the HF driver terminals. That would make it appear as an 8 ohm load to the crossover, and all is right! In the unlikely event that the HF driver output is too low for your liking, then you can consider other less simple/more expensive measures.
Cheers! Wilf.
Cheers! Wilf.
Hi Wilf,
Thanks for your imput. So did I understand correctly:
Something like this:
Soldered here:
Thanks for your imput. So did I understand correctly:
Something like this:
Soldered here:
Hi Toni:
Yes - you understood me perfectly. Just one caveat: Oddly, I have on many occasions found such a ceramic power resistor inside an OEM crossover (Altec, Yamaha, etc.) burnt to a crisp!!! My preference is to use a generously power rated resistor with a finned aluminum housing (typically gold anodized finish) and tabs with screw holes for mounting to a heat sink. (Any substantial metal surface exposed to free air is better than nothing, and feel free to use thermal paste.)
Yes - you understood me perfectly. Just one caveat: Oddly, I have on many occasions found such a ceramic power resistor inside an OEM crossover (Altec, Yamaha, etc.) burnt to a crisp!!! My preference is to use a generously power rated resistor with a finned aluminum housing (typically gold anodized finish) and tabs with screw holes for mounting to a heat sink. (Any substantial metal surface exposed to free air is better than nothing, and feel free to use thermal paste.)