Classical guitar with dynamic internal mic - no guitar in 3 extreme


by Tyger


Hello, I have an classical guitar with nylon strings.  It gas a dynamic mic/pickup.  When I go to auto setup using the cable that came with the 3 extreme, the system cannot hear the guitar.  If I change the cable for a shorter one, the system can hear something.  However, nothing comes through the monitors.

Also, using the provided cable, if I turn the guitar gain to nearly max I can get some thudding but no chord sounds.

Am I missing something or do I need a preamp?