 This onboard effects loop serves to send the full output of Tiger's pickups to the effects while allowing the guitar's volume control to vary the final output.The effects loop could be bypassed by the aforementioned switch, sending the guitar's signal from the preamp to the volume control, and then out to Garcia's preamped (and heavily modified) Fender Twin Reverb into a McIntosh MC2300 solid state power amplifier.Tiger started with DiMarzio Dual Sound humbuckers in the middle and bridge positions with a DiMarzio SDS-1 single coil at the neck.