Here is a list of transducer manufactures and some of the AVF members with experience of them. Click the link I made from the manufactures name to see the web sites. Guitammer ButtKicker Transducers Members: Richardc1983, thakursachin, Ballistix999, bad robot, SamV, Derek S-H, raheelqureshi, Nowayman, swiftpete, Wull EarthquakeSound Quake Transducers Quake 10 and 10b Members: m4rky_m4rk, rjrodders, stevefish69, supahyp, Moonfly, Suave, ahakd, VHT, Normal Bias, g1ng3r, Smurfin, Got2LoveGadgets, Point Zero, iMart Miniquake Members: museumsteve Aura Sound Bass Shakers Members: Cliff, BOOMERANGBUBB, Lovelyhead Beyma Bass Shakers Members: no one yet, these transducers are similiar to Aura Sound Crowson Tactile Motion Actuators Members: avanzato, Mitor Clark Synthesis Transducers Members: Paul Smith, Tophet808 Sonic Immersion Technologies Vibro-Tactile Ibeam Members: Suave General TT talk thread User reports There are several dedicated threads detailing members experiences of Quake, Buttkickers and other transducers. Click the link I made out of the authors names to see their report: Quake 10b m4rky_m4rk smurfin Got2LoveGadgets Point Zero MiniQuake museumsteve Buttkicker raheelqureshi Crowson mitor Comparisons Buttkicker, Quake, Ibeam shootout Big sub vs Quake Transducer No doubt I have missed a few useful posts. Just just let me know and I will add a link.