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40-50w tube amp for Aerial 9

I heard the new Dehavilland 50a at RMAF and just loved it. Dehavilland says it is nominally 40w, but practically closer to 50. I have concerns that it will not have enough power for my Aerial 9s (which I also love). They are 90db sensitive (pretty good) and have an impedance of 4 nominally, 3.2 minimum, low resistance (while I know the impedance is a factor, I am not sure how to apply it in this context).

Anyway, has anyone powered their 9s with this amp or a similar relatively low power tube amp? Anyone have any other thoughts on compatibility.

Thanks much.
128x128shredder
swampwalker's avatar
swampwalker
5,138 posts
 
Shredder- for some ss amps, its the other way around.
x watts @ 8 ohms
2x watts 2 4 ohms
Its called doubling down. some ss amps can, as far as I know, most tube amps do not do this.

For a speaker designed for voltage paradigm, no big deal. For a speaker that needs high current, its more important.
shredder's avatar
shredder OP
113 posts
 
Vary helpful, thanks much.

Sorry for having more questions, but I am still learning. Anyway, how can you determine how the rise and fall of impedance for an amp correspond with rise and fall for a speake speaker?
mds's avatar
mds
119 posts
 
Shredder, I don't think the amps impedance changes. You would need to look at the impedance graph for your specific speaker. Maybe you can contact Aerial for help, they also might make a recommendation. Or you can contact Dehavilland and tell them which speaker you are trying to use.
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