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 new DIAVLO 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
I
F
I
E 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
16. Speaker Outputs:
MINIMUM 4
Ω
LOAD !!!!
- RD50C has internal 50w 8
Ω
Diavlo speaker already plugged in.
- RD50C can accommodate RD112 Extension plugged into 2nd
Speaker output >
This is a very cool setup as you get both a open
and closed back blend
- RD50H - plug in (1) or (2) RD112 8
Ω
Extension speaker cabs
- RD50 will run with 16
Ω
load , but will not have %100 full output
volume/wattage
17. REVERB LEVEL KNOB- controls amount of Spring Reverb
18. Effects loop return- the output from external effects are
inserted here. This is also the power amp input.
19. Effects loop send -the input from external effects are inserted
here. This is also the preamp output.
20. Footswitch jack- Standard 1/4” TRS controls Channel and
boost
(Randall Model RF2T2C not included)
*IMPORTANT NOTES ON TUBES*
RD50 Amplifiers are “self biasing” so no adjustments are needed
and come with EL34L stock. The added bonus to this style of
circuit is that many different power tubes can be used in the amp
without any modification.
YOU MUST USE THE SAME (2) MODEL
POWER TUBES AT THE SAME TIME- NO MIX AND MATCH!
*The user will also experience different tone variations and various
levels of output wattage-- many under 50 watts*
Use the following power tubes:
EL34/6CA7/6L6/5881/6550/KT88/KT77/6V6
1. 1/4” Guitar Input
2. Overdrive Channel Gain
3. Overdrive Channel Volume
4. Channel Selector Switch
(Footswitchable)
5. Clean Channel Volume
6. Boost - Adds layer of tube overdrive to both
channels
(Footswitchable)
7. Bass EQ Response
8. Midrange EQ Response
9. Treble EQ Response
10. Presence Response
11. Master volume controls overall output
12. Standby/Play switch- Wait 5 seconds after
powering amp on before switching from Standby to
Play and -visa/versa.
13. Power switch turns unit on and off
14. Power cable input for mains connection.
15. Fuse socket
