What about loudspeaker impedance?
16:15
The secret about toeing in loudspeakers
19:48
Loudspeaker Impedance 4-Ohm vs 8-Ohm: Which is Better?
8:36
Is doubling speakers +3dB or +6dB? What's parallel and series wiring?
22:35
Impedance Explained.
12:09
Improving digital audio signals
19:57
Why is Coax 50 Ohms? (#340)
10:45
4 Ohm vs 8 Ohm: Which is better for audio?
9:41