Hello everyone! I am rebuilding an old tube based system. Source is a 3 channel tube amp - left center right. little less than maybe 20w per. Center is dedicated to bass. Left and right are identical 1 8"mid and 5" tweeter with an inline 5mf cap crossover (its actually closer to 4.4). All existing speakers are 8ohm.
I am interested in adding an AMT mini on the left and right channels to get more air and transparency, and am wondering if anyone can shed insight on how to best go about this? Here is what I have now:
Im guessing right now this inline cap is crossed at 3000ish.
What is the best way to integrate the mini AMT with this? I thought Id try to get 6500+ out of it, then the next tweeter can take the rest then on to mid? Or wire them together and leave the original crossover as it is? Its way too complicated for my brain, and I thought some of you smarter folks might have a better idea...
I am interested in adding an AMT mini on the left and right channels to get more air and transparency, and am wondering if anyone can shed insight on how to best go about this? Here is what I have now:

Im guessing right now this inline cap is crossed at 3000ish.
What is the best way to integrate the mini AMT with this? I thought Id try to get 6500+ out of it, then the next tweeter can take the rest then on to mid? Or wire them together and leave the original crossover as it is? Its way too complicated for my brain, and I thought some of you smarter folks might have a better idea...

When you take a step like this it always seems to get involved, meaning you are without the system while you sort it out. It may be worth using the AMT as close to a direct replacement at the beginning.. so you can listen to it while you do deeper crossover considerations.
You could measure the existing tweeter on its own, then install the AMT and adjust the crossover until you get the same response.
You could measure the existing tweeter on its own, then install the AMT and adjust the crossover until you get the same response.
"5" tweeter " = ! what brand/model?
Your diagram is an OK way to add a supertweeter, but you may need to add a resistor in series with the 2uF cap to match sensitivity
Your diagram is an OK way to add a supertweeter, but you may need to add a resistor in series with the 2uF cap to match sensitivity
Last edited:
"5" tweeter " = ! what brand/model?
Hi! Thanks. These are old Jensen Alico branded "Golden Voice" for motorola most components have manuf stamp late 1960. Speakers aren't stamped and they are paper cone. I don't have any specs on them at all, other than where the original inline cap was likely crossing
Where would this may be needed?Your diagram is an OK way to add a supertweeter, but you may need to add a resistor in series with the 2uF cap to match sensitivity
When you take a step like this it always seems to get involved, meaning you are without the system while you sort it out. It may be worth using the AMT as close to a direct replacement at the beginning.. so you can listen to it while you do deeper crossover considerations.
You could measure the existing tweeter on its own, then install the AMT and adjust the crossover until you get the same response.
Hi Allen! Its sitting in my garage getting worked on. I thought about just replacing the tweeter with a soft dome as well...no matter what Im going to have to do some carpentry because the AMT is super small and wouldn't fit in the existing hole....plus tweeters are basically on the floor / low cabinet so I thought an AMT up high might be the ticket. Im still not opposed to just replacing the tweeter if this gets too hard. Im hopeful its not