Marshall Amplification manual EL84 20/20 Front Panel Features, EL84 20/20 Rear Panel Features

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EL84 20/20 Front Panel Features

LEVEL

PRESENCE

 

 

 

OFF

 

OFF

 

 

 

 

 

 

 

 

 

 

 

EL84 20/20

 

 

 

STEREO VALVE POWER AMPLIFIER

 

010

010

ON

ON

 

DEEP STANDBY POWER

STANDBY

POWER

ENGLISH

1

2

3

4

5

1.Level Controls Level or volume of the EL84 20/20.

2.Presence Adds brightness and top end bite to your sound.

3.Deep The Deep switch on the 20/20 affects the speaker damping. By depressing the Deep switch you will add more bottom end thud to your guitar sound. Similar to the difference between open and closed back cabinets.

4.Standby LED Indicates operating status of standby (see 6).

5.Power LED Indicates operating status of amp

(see 7).

6.Standby Controls the H.T. supply to the valves and allows the valves to remain heated when not in use.

67

7.Power On/Off Switch for mains power to the amplifier.

Note: To prolong the life of the valves it is always advisable to switch on the Mains Power Switch (item 7) about 1 minute before switching on the Standby (item 6). This allows the valves to heat up to full working temperature before use.

On switching off, the Standby should always be switched before the Power Switch.

The standby facility is particularly useful live, where before playing and between sets, it allows you to keep the valves operating at a slightly reduced temperature but without any sound being produced.

EL84 20/20 Rear Panel Features

 

 

 

 

 

 

MAINS INPUT

 

 

 

 

 

 

 

 

LEFT OUTPUTS

 

RIGHT OUTPUTS

 

REMOTE SWITCHING

 

INPUTS

 

2x20 Watts RMS

 

 

 

 

 

 

 

POWER OUTPUT

 

 

 

 

 

 

 

INTO 8/16

 

 

 

 

 

 

120V ~ 60Hz

 

 

 

 

 

 

 

220 WATTS

16SPEAKER 8

LINE

16SPEAKER 8

LINE

DEEP

LEFT

RIGHT(MONO)

1

2

3

4

5

6

7

8

9

10

1. Mains Input

Connects the amplifier to the mains

 

Note: When the 20/20 is in use, speakers must be

power supply.

 

 

 

connected to both sides at all times. See Loading points

Left Outputs

2.16 Ohm Jack Speaker jack for 16 Ohm speaker cabinet for left side of power amp.

3.8 Ohm Jack Speaker jack for 8 Ohm speaker cabinet for left side of power amp.

4.Line Attenuated version of speaker signal giving whole tone of power stage. For connection to subsequent effects processor and larger power amp.

Note: When 20/20 is in use, speakers must be connected to both sides at all times. See Loading points later.

Right Outputs

5.16 Ohm Jack Speaker jack for 16 Ohm speaker cabinet for right side of power amp.

6.8 Ohm Jack Speaker jack for 8 Ohm speaker cabinet for right side of power amp.

7.Line Attenuated version of speaker signal giving whole tone of power stage. For connection to subsequent effects processor and larger power amp.

Loading Points

-The 20/20 delivers 2x20 Watts into 8 or 16 Ohms.

-The 20/20 must have either an 8 Ohm or 16 Ohm speaker connected to either side. Under no circumstances should both the 8 and 16 Ohm sockets of the same side be used together.

-The 20/20 must have speakers connected to both sides when in use.

Remote Switching

8.Deep In addition to the front panel, the Deep facility can be switched remotely by a footswitch or programmable device, such as an effects processor.

It should be noted that this will override the front panel switch position.

Inputs

9.Left Takes the left input from a stereo pre-amp.

10.Right (Mono) Takes the right input from a stereo pre-amp, or the mono input from a mono pre-amp.

A mono input will drive both channels.

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Contents Valve Power Amps From Jim Marshall Mounting the Power Amp in a Rack IntroductionEL84 20/20 EL34 50/50 & EL34 100/100EL84 20/20 Front Panel Features EL84 20/20 Rear Panel FeaturesEL34 50/50 & EL35 100/100 Front Panel Features Rear Panel FeaturesChannel a mains power rocker switch Mains & standby LEDsSpecification Chart Channel a output impedance select

EL84 20/20 specifications

Marshall Amplification has built a legacy of producing some of the most sought-after guitar amplifiers in the market, merging classic sound with innovative technology. The Marshall EL84 20/20 stands out as a remarkable offering, aimed at musicians who crave versatility without compromising on tone.

At the heart of the EL84 20/20 are two EL84 power tubes, which deliver 20 watts per channel of rich, dynamic sound. This choice of tubes contributes to a warm and distinctive tonal character, providing that quintessential Marshall crunch favored by many rock and blues guitarists. The amp features two independent channels, allowing players to switch between a clean and overdriven sound effortlessly. Channel one offers a pristine clean tone, while channel two lets players unleash the full fury of Marshall’s legendary overdrive.

One of the notable features of the EL84 20/20 is its innovative power scaling technology. This allows guitarists to control the wattage output, enabling them to achieve optimal sound at any volume level. This feature is particularly beneficial for studio recordings and small venue performances as it allows musicians to push the amp to its sweet spot without overwhelming their surroundings.

Another highlight is the built-in reverb, adding depth and ambiance to the sound. This is particularly useful for live performances, where atmospheric effects can elevate the overall experience. Players can dial in their desired reverb level to complement their tone, making it a valuable addition to the amp's versatility.

The EL84 20/20 is designed with a user-friendly interface, featuring straightforward controls that include gain, treble, middle, bass, and reverb for each channel. This intuitive layout makes it easy for musicians to customize their sound and dial in their ideal tone quickly, whether in the studio or on stage.

In terms of connectivity, this amplifier offers a range of outputs, including speaker outputs that allow for different cabinet configurations, as well as an effects loop for integrating external effects pedals. This flexibility caters to a wide array of performance styles and playing environments.

In summary, the Marshall EL84 20/20 combines classic Marshall tone with modern technology, making it an ideal choice for any guitarist seeking a powerful yet versatile amp. Its signature features, such as the EL84 power tubes, power scaling, reverb, and intuitive controls, ensure that musicians can achieve their desired sound with ease and precision, solidifying its position as a must-have in the world of guitar amplification.