I personally use a GK-3 (which really is the same as the GK-2) a wired my own 13-pin to siz 1.4&quot; jacks, which go straight into a Hammerfall Multiface. The individual signals are quite but not unusably so, maybe around -30 dB from full amplitude. That works pretty well. <br>
<br>I am planning to switch over to the graphtech GHOST Hexpander system, which has its own own battery-powered preamp, not so much because it should perform better (although I anticipate that it should) but because mounting a GK-3 on a Bigsby-equipped Gretsch is far from elegant.<br>
<br>- martin<br>