L. POWER: Turns amplifier on and off. When first switched on, Rumble Studio 40 and Rumble Stage 800 both have a typical start-up-sequence time of 15 seconds before the first preset appears in the DISPLAY WINDOW (G). For Rumble Stage 800 only, when quickly turning the power off and then on again (as during a WiFi update), a brief delay can occur during which the DISPLAY WINDOW will remain blank for 20-30 seconds. This is normal in some high-powered amplifiers such as this one, and the startup sequence will resume with no need to cycle the power switch again.
M. IEC POWER INLET: Using the included power cord, connect to a grounded outlet in accordance with the INPUT POWER voltage and frequency specified at the power inlet.
N. EXTERNAL SPEAKER OUTPUT AND IMPEDANCE SWITCH (RUMBLE STAGE ONLY): Connect an external speaker cabinet here (8Ω or 4Ω minimum impedance); combination jack works with Speakon® or 1/4” speaker cable. Set switch to match impedance rating of external cabinet; continuous power rating of external cabinet must meet or exceed power rating listed for the chosen switch setting. Set switch to 8Ω when no external cabinet is connected.
O. HORN SWITCH: Turns high-frequency horn on and off.
P. FOOTSWITCH: Connect four-button MGT-4 footswitch or EXP-1 Expression Pedal here.
Q. USB PORT: Amp connection point for USB audio recording.
R. LINE OUT: Balanced line outputs for connection to external recording and sound reinforcement equipment. The line out default setting is PRE/POST (mono), but can be configured as right/left stereo (post) outputs.
S. FX SEND/RETURN: Right/left send and return for stereo external effects use. Effects added here are “global” (not preset-specific) and act as the last elements in the signal path. Use left channel for mono effects.
Was this information helpful?