NCD - a derelict Sunn project.

[itu]

125 W - 250 W - 500 W - 1 kW 

 

There's a 3 dB step everytime you double the power. Most likely this will be in the 8 dB area, which is quite a lot. If the drivers are more sensitive than the originals, the change will be even more, maybe 10 - 12 dB. And that is a lot. 

[Jackroadkill]

1 minute ago, itu said:

125 W - 250 W - 500 W - 1 kW 

 

There's a 3 dB step everytime you double the power. Most likely this will be in the 8 dB area, which is quite a lot. If the drivers are more sensitive than the originals, the change will be even more, maybe 10 - 12 dB. And that is a lot. 

 

Crucially, the new drivers will not be blown, either!

[Downunderwonder]

9 hours ago, Jackroadkill said:

 

Crucially, the new drivers will not be blown, either!

I would still exercise caution with the 500W Ampeg and the bass knob. You might not be able to melt them but 250W per driver is still a fair poke in the ribs if it's bass heavy.