I'm trying to set the gains on a Sony ES XM-3546 (http://ampguts.realmofexcursion.com/Sony_XM-3546/). The rear channels are bridged to give a TC-1000 130 watts at 4 ohms. Following JL's website, I determined a peak voltage of ~23 (sqrt(130*4)). I set the Eclipse radio's volume to 65/80...