Advice on replacing 12 in woofer in Martin Logan Monolith III's

Peerless 835017

I think I remember looking at this, but remember the the distortion was better at 150hz on the SV-12. But the main thing for memory that turned me off it was that it’s only 83db where the SV12 was 89db and the ML panels are also 89db.

Cheers George

ScanSpeak Discovery 30W/4558T

This is better 89db, but investigate the distortion at 150hz and 1 octave above (300hz) compared to the SV12.

Cheers George

I've emiled ML to find out the cubic size,  but who know if they will respond. 

I've seen some people use the Peerless SLS 830669. Thoughts?

SLS 830669

FR too high for me.

I was told by a mate here in Australia who also wanted them for his Monoliths after he heard mine, that this guy still had the SV12's but he wouldn't ship to Australia.
http://www.highdefjunkies.com/showthread.php?t=14425&s=2374d39826a05548a2cfbdafd2d0c666&p=35...

Cheers George