[mp9]

apparently Hobby-Hifi Ausgabe 04/2008 put them in a jericho horn:
 
www.intertechnik.de/Lautsprecher-Shop/Lautsprecher/Seas-Prestige/_X1-08-EXOTIC-F8_1768,de,1439,52431.html?detail=52907
 Lautsprecherbausatz Bausatz Jericho 08-Exotic aus Hobby Hifi 04/2008 OHNE GEH?USE
438x1150x500mm
175 Liter
8 Ohm/6,4 Ohm/40 Hz
 (2,83 V, 1 m): 94 dB
(-3 dB): 53 Hz - 17 kHz

i'd like to see the actual article, but looks like it would be worth building if the jericho exponential horn were to yield a 94db sensitivity as claimed.