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.

[Jackroadkill]

Right, the new speakers are here and I've degunked the internals of the cabinet in preparation for fitting them.  Whilst doing this I looked at the cabling and wondered if it's going to be up to the job or potentially going to melt under the workload.  It wouldn't be a big job to replace the existing wiring with some heavier-duty copper, after all, so I may well invest in some for this project.  What do the BC hive mind think?

 

Once it's all together I'll get the Tolex cleaned up; the grille cloth is also disgusting (it's had 40 years - minimum - of spit, beer and bodily fluilds rained down upon it, so that's coming to work for a pressure wash and trauma counselling before it goes back on.

 

 

Side by side comparison.

 

 

 

A (nearly) clean interior; whatever has caused the splashes in the bottom port isn't keen on coming off with water and elbow grease so I may have to get a bit medieval on it.

 

 

 

This is the wiring; do we reckon it's up to the task?  

 

 

 

800w each at peak power should be enough....  Sprung connectors, though.  I might need to do something about those to ensure that the wiring stays attached.

 

So, things are coming on, and hopefully I can get the drivers (which actually fit in the holes cut in the baffle!) fitted soon.

 

Cheers,

 

JRK

[Bill Fitzmaurice]

1 hour ago, Jackroadkill said:

 This is the wiring; do we reckon it's up to the task?  

It's far larger than the wire in the voice coils. 😎

[Jackroadkill]

11 minutes ago, Bill Fitzmaurice said:

It's far larger than the wire in the voice coils. 😎

Ha, yeah, I didn't think of that..!