Fender Rumble-Bass Operation Manual
SPECIFICATIONS
PART NUMBER: 100V version: 081-2170-000
TYPE: CSR 10
DIMENSIONS: Height: 10 in. (25.4cm)
POWER REQUIREMENTS: 100V version: 100 volts AC, 50/60 Hz, 900W
FUSE TYPE: 100V and 120V version: F10A, 125V min.
INPUT IMPEDANCE: Input A: 2.5 M ohm
EFFECTS LOOP: Output Impedance: 42.5 k ohm
EFFECTS MIX CONTROL: Continuously variable between the signal at the EFFECTS
PRE-AMP OUT: -9.5 dBV nominal output.
POWER AMP IN: -9.5 dBV nominal input sensitivity.
120V version: 081-2100-000
230V version: 081-2160-000
240V version: 081-2130-000
Width: 24.5 in. (62.2cm)
Depth: 13.5 in. (34.3cm)
Weight: 70 lbs. (31.75kg)
120V version: 120 volts AC, 60 Hz, 900W
230V version: 230 volts AC, 50 Hz, 900W
240V version: 240 volts AC, 50 Hz, 900W
230V and 240V version: F5A, 250V
Input A/B: 2.0 M ohm
Input B: 2.5 M ohm
Input Impedance: 1 M ohm
SEND and the EFFECTS RETURN jacks.
BALANCED LINE OUTPUT: Derived from the output transformer, fully balanced.
+1 dBv nominal output.
Pin 1 floating, pin 2 (+), pin 3 (-).
AMPLIFIER LOAD IMPEDANCE: 4 ohm with MAIN SPEAKER only.
2 ohm with EXT. SPEAKER included.
AMPLIFIER DAMPING FACTOR: 3.1 at 4 ohms
POWER OUTPUT: 300 Watts, 5% THD into 4 ohms.
SUGGESTED SPEAKER
ENCLOSURES: 081-3100-000 Rumble bass 410
081-3101-000 Rumble bass SUB
081-3102-000 Rumble bass 115
WARNING: NO USER SERVICEABLE PARTS INSIDE, REFER SERVICING TO
QUALIFIED PERSONNEL ONLY.
WARNING: TO REDUCE THE RISK OF FIRE OR SHOCK HAZARD,
DO NOT EXPOSE AMPLIFIER TO RAIN OR MOISTURE.
RUMBLE BASS®OWNERS’ MANUAL
INTRODUCTION
The Fender Amp Custom Shop is dedicated to creating high quality amplification to serve
top artists and discriminating players. The Rumble Bass is a unique amplifier with many
possibilities. It is a 300 watt, two channel bass “Head” with special features which set it
apart from anything offered before.
The Rumble Bass is an all tube instrument amplifier. There are no solid-state (transistor)
devices in the signal path of any kind. Its’ two channels may be operated in combine mode
or switch mode. In switch mode, the footswitch (provided) may be used to switch channels
or to “A-B” switch between two different instruments. In combine mode, one instrument
may be linked to both channels for infinite tonal shaping, or two instruments can be played
simultaneously, each with independent control of volume and tone. A “Cut” control on
each channel allows a cut in midrange frequencies to suit playing with a pick or for playing
slap style. A straight forward Treble-Bass-Mid Tone control section allows for adjustments
in tonal balance at frequencies musically relevant to the bass guitar. An effects loop with a
mix control to infinitely adjust the amount of external effects is standard, and is switchable,
on or off, in both channels. Like the other Fender custom amps, the Rumble Bass is
painstakingly built, one at a time, by a select group of craftsmen at the Fender electronics
factory in Lake Oswego, Oregon.
It is suggested that you read this manual thoroughly to understand all the features and
functions of this amplifier. This amplifier will provide years of trouble-free service and playing enjoyment.
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