Marshall DSL20CR 1×12 Inch 20 Watt Tube Combo Amp User Guide
- June 12, 2024
- Marshall
Table of Contents
Marshall DSL20CR 1×12 Inch 20 Watt Tube Combo Amp
WARNING! SAFETY INSTRUCTIONS
Please read this manual carefully before plugging in. Follow all instructions and heed all warnings.
Warning: Please refer to full details in separate Important Safety Instructions CATS-90009.
Warning: before going any further, make sure that your amp is compatible with your mains electricity supply. If you have any doubt, please seek help from a qualified technician – your Marshall dealer can help you with this.
MAINS INPUT & FUSE
The specific mains input voltage rating that your amp has been manufactured
for is indicated on the rear panel of the amp. Never attempt to bypass the
fuse or fit one of the incorrect value or type.
Warning: your amp must be switched off and disconnected from the mains
electricity supply before you check and/or change any fuse.
IMPORTANT SET UP INFORMATION
Follow the start-up procedures below to safely switch on your amp.
Warning: Failure to follow these instructions may damage your amp.
-
If using your DSL amp with an extension cabinet, make sure the power handling rating of the speaker cabinet is equal to or higher than the output power of the amp. Connect a single 16Ω speaker cabinet to the single speaker output on the rear panel, or a single 8Ω speaker cabinet or two 16Ω speaker cabinets to the double speaker output.
Note: When connecting a speaker cabinet make sure that you use a proper speaker cable. Never use a screened (shielded) guitar cable for this purpose. -
Ensure the power switch is switched off and set all master volumes on the front panel to zero.
-
To use the footswitch, connect the footswitch cable to the footswitch socket on the rear panel of the amp.
-
Connect the supplied mains (power) lead into the mains input on the rear panel first and then into an electrical outlet.
-
Plug your guitar into the input jack socket on the front panel.
-
Turn the front panel power switch on. The switch will glow red. Turn the selected channel volume up to your preferred level and your amp is ready to play.
TRANSPORTING YOUR EQUIPMENT
Please ensure that your amp is switched off, unplugged from the mains
electricity supply and all removable cables have been disconnected from your
equipment before attempting to move it.
Only move the amp on its own; do not attempt to move it while it is stacked on
top of a cabinet or other equipment.
FCC COMPLIANCE STATEMENT
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and the receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
CAUTION: Any changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment.
This device complies with CAN ICES-3(B)/NMB3(B)
SPECIFICATION
From clean to distorted overdrives, the DSL is a versatile all-valve amp packed with features including an effects loop, power reduction switch and digital reverb. Your amp has been specifically designed to sound great at a range of volumes. Perfect for you to use at home, in rehearsals and studios, or on stage.
| MODEL: | DSL20CR | DSL20HR |
|---|---|---|
| Power | 20W (with power reduction option to 10W) | 10W (with power |
reduction to 10W)
Valves| 3 x ECC83 and 2 x EL34| 3 x ECC83
and 2 x EL34
Channels| 2 (split) “ultra gain” and “classic gain”
Equalisation| Treble, middle, bass, presence, resonance, tone shift
switch
Effects| Digital reverb
Outputs| 3 x ¼” jack speaker output (16Ω / 8Ω),
1 x 3.5mm jack emulated line
out
Effects loops| Yes, series, send/return
Speakers| 1 x 12” Celestion Seventy 80 (80W, 16Ω)|
N/A
Unit weight| 16.3kg| 9.7kg
Unit width| 500mm| 500mm
Unit height| 420mm| 250mm
Unit depth| 250mm| 240mm
FRONT PANEL FUNCTIONS
DSL20CR
DSL20HR
-
INPUT
Connect your guitar here using a ¼” jack instrument cable. -
CHANNEL SELECT
Press to switch between classic gain and ultra gain channels:
• The classic gain channel status light will illuminate green to indicate the classic gain channel is selected.
• The ultra gain channel status light will illuminate red to indicate the ultra gain channel is selected.
Channels can also be selected using the supplied footswitch.
CLASSIC GAIN CHANNEL -
GAIN
Controls the gain level for the classic gain channel. Use this control to adjust the amount of input gain/signal sent into the preamp stage.
Running a higher gain setting increases the level of distortion in your sound. -
VOLUME
Controls the volume level of the classic gain channel.
ULTRA GAIN CHANNEL -
GAIN
Controls the gain level for the ultra gain channel.
Use this control to adjust the amount of input gain/signal sent into the preamp stage. Running a higher gain setting increases the level of distortion in your sound. -
VOLUME
Controls the volume level of the ultra gain channel.
EQUALISATION SECTION -
TONE SHIFT
Tone shift reconfigures the preamp EQ, giving you a distinctly different sound. When tone shift is engaged, high and low frequencies are accentuated and mid frequencies are cut. -
TREBLE
Controls the higher frequency content of your sound. Turning clockwise will increase the highs making the sound brighter. -
MIDDLE
Controls the middle frequencies of your sound. Turning clockwise increases the level of mid frequencies in your sound. Turning anticlockwise reduces the middle frequencies, ‘scooping’ the sound – this is accentuated when used in conjunction with Tone Shift. -
BASS
Controls the amount of lower frequency in your sound. Turning clockwise will increase bottomend making the sound fuller. -
PRESENCE
Adjust the power amp EQ to add treble to your sound. Turning clockwise brings out the top end frequencies in your tone. -
RESONANCE
Adjust the power amp EQ to add body to your sound. Turning clockwise brings out the low end frequencies in your tone.
Note: The EQ controls are linked. Altering the setting of one control can change the way that the other controls behave, so it is worth experimenting to find your sound. -
REVERB
Controls the overall reverb level. -
OUTPUT
Use this switch to reduce power level from 20W down to 10W, or to place the amp into standby mode. -
POWER
This turns the amp on and off.
REAR PANEL FUNCTIONS
DSL20CR
DSL20HR
-
16. MAINS INPUT
The supplied mains power lead is connected here. The mains input voltage rating that your amp has been built for is shown on the rear panel.
Warning: before powering on, ensure the amp is compatible with the mains voltage of the country that the amp is being used in. If you have any doubt, please get advice from a qualified person. -
17. FX LOOP RETURN
Connect the output of an external FX pedal or processor. -
18. FX LOOP SEND
Connect the input of an external FX pedal or processor. -
19. F/S
Connect the supplied channel footswitch here (PEDL-90012). -
20. AUDIO IN
Connect an external device here to practice with or jam along to music. -
21. EMULATED OUT
Frequency-compensated line level output for headphones. This output features cabinet emulation by Softube®. This means the sound from this output includes simulation of the sound of a speaker and a cabinet.
Warning: When using the DSL20HR head for ‘silent’ practice or DI recording, only disconnect the speaker cabinet from the amplifier’s rear panel while the amp is switched off. Never unplug the speaker cable from the speaker cabinet while it is still connected to the amplifier rear panel.
This may damage your amp. -
22. SPEAKER OUTPUTS
Connect an optional 1 x 16Ohm extension speaker cabinet, or 1x8Ohm cabinet, or 2x16Ohm cabinets for the DSLCR combo.
Warning: Any other speaker configuration may stress or damage the amp.
Customer Support
Whilst the information contained herein is correct at the time of publication,
due to its policy of constant improvement and development, Marshall
Amplification Plc reserves the right to alter specifications without prior
notice.
MARSHALL AMPLIFICATION PLC, DENBIGH ROAD, BLETCHLEY, MILTON KEYNES, MK1
1DQ, ENGLAND.
T: +44 (0) 1908 375411
MARSHALL AMPLIFICATION PLC
REGISTERED IN ENGLAND
REGISTERED NUMBER: 805676
M3311.414 | CATS-90263-03
MARSHALL.COM