MIT Multipole Speaker Terminations
Similar to the MPC line level terminations are MIT's Multipole In-Wall termination systems, shown here by Kent Loughlin. The five-way binding posts fit into an ordinary on-wall quad box and come in three configurations: 11 pole, 15 pole, and 21 pole network. No soldering required.
The 11 pole AVt is $19/channel, the 15-pole Shotgun is $399/channel, and the 21-pole Magnum is $599/cannel.