Randall RD40C - Amplifier Manual

Introduction

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 your new machine. Please review the safety instructions 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 power supply should be for your countries' power standard.

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

16. Speaker Outputs: MINIMUM 4Ω LOAD!!!! (1x16Ω,2x16Ω,1x8Ω,2x8Ω,1x4Ω)

• RD40 has internal 50w 8Ω Diavlo speaker already plugged in.
• RD40 can accommodate 8Ω Extension cab plugged into 2nd Speaker output

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)

*IMPORTANT NOTES ON TUBES*
RD40 Amplifiers are "self biasing" so no adjustments are needed and come with 6L6 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

For detailed product videos please visit our website at:www.randallamplification.com