At only $20,000, TW-Acustic’s Raven AC four armed/motored monster of a turntable answers no one’s need to run and compare four different cartridge and tone arm combos on one turntable rig. I would not allow this thing in my house for fear that it would come alive at night and terrorize my children with its foreboding-quadruple-diamond-tipped-death-tubes. I can’t figure out if the tone arms and cartridges are included in the $20K price tag, maybe not.
Home Theater Hi-Fi’s comment from the Rocky Mountain Audio Fest:
Here’s a close-up of the turntable (TW Acustic – $20,000). Notice that there are four tone arms. I thought this might just be for demonstration purposes, but no, you can purchase it this way so that you can use different cartridges for various sound characteristics.