US 9V Power Adaptor for the Hartke VXL Bass Attack Effects pedal by myVolts
MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Hartke VXL Bass Attack Effects Pedal - US Plug with Extension and ON/Off Switch - - Amazon.com
Hartke VXL Bass Attack Preamp And D.I. Does The Job Of Multiple Pedals, Is Frequently Stepped On (Vi - YouTube
Hartke VXL Bass Attack or Sans Amp Bass Driver DI | TalkBass.com