Randall RM20 User manual

RM20/22
OPERATION MANUAL
A M P L IFIE R S
RM50/RM80
M O D U L A R T U B E C O M B O S
O W N E R S M A N U A L
18 watts- (2) EL84 power tubes
1 or 2 MTS Preamp Module Slots
Switchable boost with Variable Gain
and Variable Level
Density and Presence Control over
Power Amp
“Silent Mode” allows for Direct output
operation without Speaker Output
XLR Recording Output
Series Effects Loop
User-accessible Tube Bias Section
Celestion 25w Greenback Speaker
(Combo Versions)
“BP” = Black Vinyl and Palomino Grill
Cloth
“HB” = Head version, Black
Randall Warranty
Randall Amplifiers, a Division of U.S. Music Corporation warrants the
product you have purchased to be free of defects in materials and workmanship
in normal use for a period of two (2) years from the date of original purchase.
This warranty shall run to the original purchaser when purchased from an
Authorized Randall Dealer. The manufacturer warrants speakers for a period
of (1) years. The manufacturer warrants tubes for a period of (90) days.
Defective parts found during the applicable warranty period with proof of
purchase will be replaced or repaired without charge if the complete product is
returned to US Music Corp or any Authorized Randall Service Center within
the U.S.A. Randall reserves the right to use materials readily available at the
time of the repair. All Warranty service requires Proof of Purchase (sales
receipt) to be presented at time of service request. Any repair or service
performed by any person of entity other than an Authorized Service Center is
not covered by this limited warranty. The customer pays transportation to and
from Randall factory service or any Randall Authorized Service Center. Rental
stock is warranted for (1) year from date of invoice to the Authorized dealer.
Warranty on rental units is not transferable.
What is covered against manufacturing defects
Parts and Labor to correct any defect in materials used and any defect
attributable to workmanship.
What is not covered:
Shipping Damage. Report damage upon receipt of item to the carrier (i.e.
UPS). Freight carrier must be notified upon receipt of items to insure freight
damage claim resolution. Shipping damage not filed with carriers within (48)
hrs upon receipt will not be covered under warranty. Report any shipping
damage within (48) hrs of receipt to the Randall Customer Service Dept at
1-847-949-0444, ext. 5120. Keep all original documents and packing materials
to insure freight damage claim resolution. Merchandise that has been modified
after original shipment from the Randall factory. Products whose serial
numbers have been altered or removed. Exterior normal wear and tear damage
to the finish due to misuse, operation outside the specified ratings, neglect or
accident. Warranty claims by anyone other than the original purchaser. Randall
is not responsible for any items left in protective covers or cases, (We strongly
advise that all personal items such as chords, cables, tuners, etc… be
removed!) freight charges to and from the factory or an Authorized service
center on customer owned goods, any and all charges incurred from priority
service requests (Rush Service) or priority shipping for replacement parts. Any
and all charges if no problem is found.
Return Authorization
All items being returned for any reason must have a Return Authorization
number. This RA# must be placed on the outside of the carton of the item being
returned or the carton will be refused upon delivery. Please call the customer
service department at 1-847-949-0444, ext. 5120, for the return authorization
number. Dealer stock items will be returned to the dealer freight prepaid.
An Authorized Warranty Service Center must perform any and all field
warranty service work. Customer will not pay for parts and/or labor provided
the problem found is within warranty guidelines. Proof of purchase must be
provided at the time of service request. Transportation charges to and from the
Authorized Warranty Service Center are the responsibility of the customer.
Rush service charges and special freight charges for required parts are not
covered under warranty and are also the responsibility of the customer. If a
unit is not easily transported to an authorized service center, the customer is
responsible for technician travel charges. Any charges for labor or processing
when no problem is found are also not covered under warranty. Any charges
incurred for work performed by an unauthorized service center are the
responsibility of the customer.
Warranty'terms'may'very'per'country,'check'warranty'
terms'with'local'Distributor'or'at'point'of'purchase.
www.randallamplification.com

Congratulations on the purchase of
your new RANDALL Amplifier!
We at Randall Amplification appreciate that
you chose our brand of guitar instrument
amplifiers and wish you years of great tone
and enjoyable playing time with our proven
MTS Series.
Please review the safety instructions
below and be aware that the
documentation provided in this manual
references 120volt USA versions of the
models covered. Note that the POWER
listed on the back of the unit should be for
your countries’ power standard.
A M P L IFIE R S
RM50/RM80
M O D U L A R T U B E C O M B O S
O W N E R S M A N U A L
*Note that RM20 has same operation as
RM22 (shown) but with only one MTS slot*
1. Channel Selection Switch (Footswitchable)
2. 1/4” Guitar Input
3. Channel 1 Boost Switch (Footswitchable)
4. Channel 1 Boost Gain- Controls the amount of tube
overdrive (Footswitchable)
5. Channel 2 Boost Switch (Footswitchable)
6. Channel 2 Boost Gain- Controls the amount of tube
overdrive (Footswitchable)
7. MTS Preamp Module Slot #1
8. MTS Preamp Module Slot #2 (RM22 models)
9. MTS Module Thumbscrew- 2 per Module
10. Channel 1 Boost Level- Controls the amount of
volume increase when engaging boost function.
11. Channel 2 Boost Level- Controls the amount of
volume increase when engaging boost function.
12. Density knob controls the low frequency EQ
response of the power amp section
13. Presence knob controls the high frequency EQ
response of the power amp section
14. Power switch turns unit on and off
15. Switch for Silent/Standby/Live Modes
•Silent Mode sends amp signal to XLR output and
mutes speaker outputs- The amp can work
standalone without speaker hooked up (Automatic
when no external speaker connected on Head
versions)
•Standby Mode - amp is powered but no output-
Leave in this mode when powering on and off
•Live Mode - Standard output to speaker or cab.
16. Power cable input for mains connection.
17. Fuse socket
18. Footswitch connection for included footswitch
•1/4” one button switch for RM20 models
•Multi-pin 3 button footswitch for RM22 models
controls channel selector and Boost function for
each individual channel.
19. External Speaker output 4/8/16 Ωoperation
(Combo models have internal cord to connect to
internal speaker)
20. Preamp 1/4” line output
21. XLR Direct Recording Output (Speaker Simulated)
22. Power Tube Bias Section (see attached
Document)
23. Effects loop return - connect from output of
external effects unit
24. Effects loop series send - connect to input of
external effects unit