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Is 5 Watts enough for Horns ?

How much power is enough to drive a 107dB sensitivity Avantgarde ?
Is 5 Watts from A 300B SET enough?
Consider that the Subwoofer of the Avantgarde has its own high power amplifier (each woofer 500 Watts)so the work in the bass department is largely taken up by the subwoofer amp.
I have seen McIntosh MC501 power amps connected to 107dB sensitivity Avantgardes and seldom did hit the 5 Watt mark on the meters when cranking the volume up to hurting levels.
0.5 Watts was what the meters show at normal listening levels.
eljaro
lak's avatar
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lak
4,577 posts
 
5 watts will work out fine for your size room.
triode
263 posts
 
300B amps are fine on Duos. I've since switched to 18 watt "behemoths" (Lamm ML2), but for sonic reasons, not lack of volume capability.
ttrhp
107 posts
 
The David Berning headphone amp only put out about 1 watt is plenty of power for my avantgarde horn..but I prefer the 300B amp for my horn..
t_bone
1,182 posts
 
Assuming the doubling of effective power per every 3db sensitivity increase (assuming both sensitivity and power are measured correctly), 5 watts at 107db is the same as 320 watts at 89db. For most 89db sensitive speakers, 320 watts would be considered fine and another 20% (5 to 6) would probably enough overhead.

I don't see a problem with 5 watts...
phd
1,301 posts
 
As long as it is tube watts and the speakers are efficient maybe 95 db and above, yours are extremely efficient at 107 db. From what I gather, 5 tube watts per channel are equal to about 15 watts of solid state power. I had a tube amp (push/pull) that was 8 watts per channel and my speakers have an efficiency of 110 db. I could drive my speakers to almost concert hall levels.
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