Suggestions for high efficiency speakers?

I heard that rumor too.  That would be sort of in keeping with Audio Note having developed a field coil phono cartridge.  I like the idea of Audio Note improving on the dynamics and "speed" of their woofer/midrange driver--something I would expect with a field coil magnetic structure.  I hope they can handle any issue with heat from the magnet in a smallish box, and avoid any issue with the owner/user having to adjust voltage to optimize the sound.  Audio Note appears to make it a priority to keep operation of its gear simple and easy (e.g., they employ cathode biasing so that bias doesn't have to be adjusted by the owner).

@atmasphere --

"You can look at this as theory or fact; works the same regardless ..."

That's dangerously arrogant. You're not acknowledging the alternative, which is conspicuous in itself, and I doubt you've had a pair of symmetrically-to-the-mains placed horn subs or other efficient, large 6th order bandpass ditto (from a point of other design criteria) in your home setup augmenting your CAL's to counter your rigid claim. That is: fact, apart from the scientific approach (and business venture) you're readily advocating, is actually hearing the stuff up close to challenge your theory. Smoothness in bass response is an important boon, but it's not all their is to excellent bass reproduction and overall integration. I work from an (active) outset where high-passing the mains, preferably no lower than ~80Hz, is an important trait in securing the best integration with the subs while adding headroom and cleanliness in reproduction from the mains. It's also why symmetry of placement as outlined is important.

Again, different ways to skin you cat. 

That's dangerously arrogant. You're not acknowledging the alternative, which is conspicuous in itself, and I doubt you've had a pair of symmetrically-to-the-mains placed horn subs or other efficient, large 6th order bandpass ditto (from a point of other design criteria) in your home setup augmenting your CAL's to counter your rigid claim.

Its just physics, physiology and its not my theory- its that of Dr. Earl Geddes IIRC. I'm not certain of what you are trying to say in parenthesis. If you are careful with placement, you can get good bass at the listening position with only two subs. In my case, having done many installations at shows and the like over the last three decades, I've found the DBA to be a nice solution for a vexing problem of getting the bass to play properly where the listeners will be sitting.

I recommend the Swarm becuase its designed to be as innocuous as possible. Its also reasonably priced. I've no financial association.

Having recorded a number of LPs, some of which I mastered myself, its nice to be able to compare to my own expericence of having been there when the recording was made. If you can better that reproduction as you seem to be claiming, I'd love to hear it.

magnet drivers. I think that the permanent magnet version of the Western Electric 555 compression driver is at least as good

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My tech  believes a good (= heavy duty) ferrite is every bit as good as a lighter weight Nd/Alnico/FC motor system. But as you say if given a choice, you would opt for FC.

Whereas I would opt for Nd.

That aside,, I’m beginning to believe most important component in a FR is the cone material.

There are Bamboo fiber/TB Banana fiber/Kanuf fiber/Fostex Paper /some Voxativ paper/mineral composite/AER Paper coated treated/Cube Sandwiched paper/mineral composite mix/Mark Audio Wood composite/Davidlouis Someone on DIY has argued wood IS PAPER.. well duhh yes, but it ain’t paper paper. Its wood,, something like bamboo wood fiber, exact same wood fiber as a few of Vox’s higher end/higher priced models. Each material will offer a slightly different sound resonances throughout the entire mid fq.s 200/300hz through to the 4k/5khz. Low bass 40-80hz and highs say 10k-15khz these will be very close in all materials just listed.

Sure magnet structure ~~Cube’s 81 Nd/at a combined weight of 1480 grams is stunning, not to mention their *8secret mix magnetic motor also looks like it has POWER,, AER’s massive magnet motors, as well as Vox’s huge ferrite magnets. So all top lines offer pretty much excellent magnetic field power to drive the electrons through the cone /whizzers/phase plugs. Its the cone material composition which will determine how each high end manufacturer’s speaker will voice the critical midrange resonances and nuances.

IOW each will have a particular **house sound**. Its this **house sound** which is what makes the voice either to our liking, or not so well liked. ~~Come material determines a FR voice in the band width which is our main concern in FR speakers. Not bass, not highs.

These bands are only secondarily of importance.

bump.......