I amazed at the output of my SB-2. Crazy that a passive bass pumps out that much signal.I crank mine up. My SB-2 is probably the hottest of all of mine. Using a Cafe Walter headphone amp my JB-2 I set the input to about 1 o'clock, SB-2 about 8:30, L2k about 10.
SB-2 is the punk rock bass.