The most efficient 8 inch driver in the world?

[AndrewT]

but 2 to 3times dearer.

 

[Phenoholic Anonymus]

There seems to be a sweetspot / trade off for these high effiency drivers imho. The "flatest" response comes with some loses in suspension, a higher rms factor. Another hi eff pro driver to consider: 0028 8M400 - LF Transducers - Ferrite 8M400 : Eighteen Sound - professional loudspeakers

And here one without all the damping of the cone / not so flat response, high qms/ low rms. And some serious magnet power.
http://www.oberton.com/index.php?op...id=134:8nm200&catid=48:neodymium-loudspeakers

 

[xrk971]

Here is a 100dB offering from PRV as a midrange.
PRV Audio 8MR500-NDY-4 8" Neodymium Midrange Woofer 4 Ohm

 

[basreflex]

don't believe the dB spl numbers take Fs/Qes that's your figure of merit or bandwidth efficiency product BEW.. then you see that the oberton gives much more trustable numbers

 

[Eldam]

anyone to try to source at Audax the outdated PR17ZO ?

 

[superlian]

I think after regarding specs, own experience and looking at the graphs then JBL 2118 / 2119 is one of the most efficient drivers drivers with true 95-97 dB in my 300-3000 Hz range. JBL isnt exaggerating specs. JBL has also a very smooth response and are best in class regarding cone breakup.

 

[Beijert]

google found me this link
http://www.google.co.uk/url?sa=t&rc...=6WV9ScEPnEO5IX2g10xt9A&bvm=bv.80642063,d.ZGU

There seems to be some doubt in the specs.
at the beginning it says 40W and 96dB
and later it says 80W and 99dB/W @ 1m
the first results in a maximum of 112 dB@ 1m
the second results in a maximum of 118dB @ 1m

Whereas the next post gives 121dB @ 1m from a double mms, double the Vmax, double BL, nearly double magnetic weight and 140% gap flux.

I can't find anything about the 40 watts and 96dB but the graph shows it has a reasonable off-axis response doesn't it? Would an acoustic lens be usefull (or even possible) for midrange units like this?

I am planning on using this one in an efficiënt hifi speaker myself, maybe with a nice (diy) ribbon tweeter.
Before this I just topped off the upper end a bit and used a bullit tweeter at around 5500 hz, that sounded just fine in my 12 m2 bedroom. (First diy build with 2 x15" underneath each)