It’s a trick to neutralise distortion. The distortion arises because the cone moves differently when it’s closer to the magnet than when it’s further from the magnet. That’s the problem we’re trying to fix.
So we need to arrange for one cone to be closer to the magnet when the other cone is further away, and vice versa.
If you point the two dust caps at one another then they both move away from their magnets at the same time. And half a cycle later they both move towards their magnets. That’ll make just as much sound as Linkwitz’s arrangement, but it won’t cancel the distortion. Linkwitz’s arrangement does cancel the distortion.
If it’s any consolation it wasn’t clear to me to begin with either. But after some head scratching I realised that he is (was, bless him) right.
I have also got the initial flares 3D printed but just need to get around to picking them up, I went a bit mental and got them done with 90% infill . Will put photos up once I get them.
So I just need to get the connectors and wires and the wood cut. Then I can finally start assembly. I modelled out the handles as I have no need to move them around once they are done and it will make the cabinet a cleaner look.
I still haven’t decided on the sub side and will likely build these up then decide how much bass I really need.
Visually I like this look/style someone found the other day, although would still consider the MEHs on stands and a single sub somewhere else in the room.
They do look lovely, but I’m not sure that works be my bass solution of choice. If the MEH go down to 80Hz, I’d go big - scoop, tapped horn or Lab sub!
Even at 22hz cut off you’re missing a whole octave. 11hz or nothing.
But it really depends on how and what you listen to and where you live. Every system is a set of compromises and what one person can live without another can.
In my case I’m happy with down to roughly mid 30’s and I’m sure my neighbours are happy with that as well.
. Will put photos up once I get them.
