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Will a 25w pure class A amp sufficient to drive the tweeter ?
Will a separate 25W pure class A amp sufficient to drive the mid range driver ?
I have a 200W amp to drive the bass.
Most active studio speakers would use 100w or more on the midrange.
That said, there are quite a lot of people using 40watt full range at home.
So depending on your listening habits, 25 watts could be more than enough - not for AC/DC at concert level maybe.
The crossover freq will be 600 Hz and 3000 Hz.
I have a number of different setup, but you can assume a general set of drivers.
setup 1: Seas Excel C18EN002/A (E0060) 6.5" Coaxial. The mid is 87db and the tweeter is 90db.
setup 2: Dynaudio D76 (90db) as the mid unit and a SEA T29MF001 Magnum tweeter (92db)
setup 3: Volt VM752 (92db) as the mid unit and a ScanSpeak D2908/7140 Beryllium Dome Revelator Tweeter
The bass units are twin Scan 18w/8531. Or I can use another box with twin Scan 25w/8565.
I have an impression that 25w for the mid driver may not be enough.
Bu, we need to know the impedance of each mid driver between 600Hz and 3000Hz.
IF your 25w class-A amp power doubles into a 4 ohm load, you may just have enough power for 2 and 3.
Skeptical Measurer & Audio Scrounger
How far can a car go on a tank of gas?
Exactly, way more info needed.
Wouldn't we need to know the models/efficiencies of the drivers to answer those questions?
FWIW - I use a 3-watt SET to drive my tweeters (Beyma ribbons) and a 30-watt PP to drive my woofer/mids (Altec 416s).
As yo mention, you use high efficiency bits.
For a person who does not mention anything special, I would naturally assume average modern relatively low efficiency bits of speaker.
I would guess 25 watts would be plenty for the mid.
"The Borg is the ultimate user. They're unlike any threat your Federation has ever faced."
- Q, 2365
Low frequencies need a lot more power. So the tweeter really uses only a tiny fraction of the total. However the midrange, depending on the crossover points may really need a lot more than 25 watts..
So I would say as a general thing NO to the low powered midrange amp.
100 watts would be way better for the midrange, with the 200 to the woofer, and 25 to the tweeter.
It really depends on the efficiency of the midrange driver. You could use a Lowther PM2A as a midrange unit and drive it with 2 watts
What tweeter and mid?
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