Advice on Sterling LS3/6

thanks @treepmeyer

it won't be for me (i wish) so I will pass it on 

The Stirling LS3/6 can serve as an “end game” speaker for many listeners. The biggest caveat is that in moderate to large rooms, the bass rolls off steeply below ≈45Hz. Wall reinforcement can somewhat lower that cutoff but the speakers need a decent amount of space to produce the clearest midrange, largely due to their thin-panel design.

The good news is their woofers can be upgraded to the 8” Seas Curv cone (as I’ve done in my Stirling SB-88s) without any requisite crossover mods. This woofer will give a little more extension and considerably greater bass dynamics and punch. Other than some soldering, the upgrade is “plug n’ play.” The Curv cone also has superior bandwidth and better suited to being crossed over above 3kHz. 

The lower tweeter can also be upgraded to the Seas Prestige H0881. 

It has a rear chamber that the original lacks, which might account for the improved performance, albeit the improvement is smaller than that of the woofer upgrade. Again, this driver is essentially “plug n’ play.” 

<$4K is a steal for the LS3/6 IMO, especially for those who already own good subwoofers. Some do indeed seem to prefer the SHL5+. However, IME, the Stirlings (even the smaller SB-88s) can handle a lot more power and play much louder before straining than can any of the 8” woofer Harbeths. The Harbeths have a higher sensitivity though, so for those who prefer low power amps, they are perhaps the better choice (price differential ignored). 
 

Last I knew, Doug Stirling was still the owner of Stirling Broadcast. If he sold the company to Derek Hughes (who was only contracted to design the speakers AFAIK), that’s news to me. 
 

Sorry, my confusion.  It's Doug Sterling who is retiring and shutting down Stirling Broadcasting, not Derek Hughes.  Thanks for the correction.