Malcolm Moore explains why limitations are not preferable "For a guitar, the audio spectrum needs are wide. ...The lower open E string has a fundamental of about 128 Hz, and significant harmonics are the second, fourth, sixth and eighth meaning the spectrum here extends to 1024 Hz. On the twelf...

"Milbert argues that their output stage is not an amplifier per se, but an impedance matching system" The impedance matching apparatus ("ZOTL") is not an amplifier, and that's not an argument - it's made clear in the patent itself that it is not amplifier; if there's any argument...