The cascading hook everyone thinks is delay — and isn't. Dave Keuning recorded it with one rig: a 1970s Ibanez Destroyer straight into a loud Fender Hot Rod DeVille. The shimmer is a moving Dadd9 voicing with the open high E ringing through it, played in standard tuning, pushed to edge-of-breakup. The famous Telecaster / AC30 / dotted-eighth-delay 'recipe' is a myth that contradicts Keuning's own account.
An active buffered splitter with a ground lift clears most stage hum. Here is when only a transformer breaks the loop — and what the phase switch is actually for.
Variable power amps occupy a niche between attenuators and modeler/cab combinations. Here is what they actually solve, what they cost, and when the engineering trade-off is worth it.
Pickups give you a tight, isolated direct signal but lose the body of the instrument. A microphone captures the body but picks up the room and bleeds. Run them together — pickup for the attack, mic for the air — and you get the recording most acoustic guitarists are actually trying for.