TROUBLESHOOTING GUIDE
TUBE NOISE:
Because Valve-Dynamic is tube hybrid design, you may encounter some usual tube noise and/or microphonics over time.
As with any tube amplifier we recommend that you carry a spare 12AT7 for this amp as the tube will need to be replaced. You
can diagnose a tube related problem if the amp begins to make a crackling or microphonic type noise. If the amp has lower
than normal output this can also be caused by a defective tube.
AMP DOES NOT POWER UP:
If the amplifier will not power up after you have plugged it into a known working power strip or wall outlet the first place to check
is the main fuse located inside the AC Inlet on the rear panel. Remove the fuse from the fuse holder and replace the fuse using
the same size and value of the existing fuse. If the amp still will not power up, contact your local Randall Dealer or Service Center.
Find your local dealer on our website at www.randallamplifiers.com
SPECIFICATIONS
Below are the main specifications for each RB Series Bass amplifier with Valve-Dynamic power. For full power output please
remember that you must use a single 4 ohm cabinet or two 8 ohm cabinets totaling 4 ohms.
RB750
750 Watts RMS @ 4 ohms
380 Watts RMS @ 8 ohms
175 Watts RMS @ 16 ohms
RB500
500 Watts RMS @ 4 ohms
270 Watts RMS @ 8 ohms
130 Watts RMS @ 16 ohms
RB300
300 Watts RMS @ 4 ohms
150 Watts RMS @ 8 ohms
80 Watts RMS @ 16 ohms
Randall guitar amplifiers, bass amplifiers and speaker enclosures are warranted to be free of defects in materials and
workmanship in normal use for a period of three (3) years from the date of original purchase. The manufacturer warrants
Jaguar speakers for a period of two years. The manufacturer warrants tubes for a period of sixty days. Rental stock is
Warranted for one year from date of invoice to dealer. Warranty on rental units is not transferable. During that period,
Randall will repair or replace, at Randall's option, any Randall product or part thereof which is found by Randall to be defective.
The customer pays transportation to and from Randall factory service or any Randall Authorized Service Center. Randall
reserves the right to use materials readily available at the time of the repair. Warranty service requires Proof of Purchase
(sales receipt) to be presented at time of service request.
REGISTER YOUR WARRANTY ON-LINE AT
www.randallamplifiers.com/about/warranty/randallreg.asp
RANDALL WARRANTY
