Bluesbreaker, Front Panel | Marshall Amplification 1959SLP, 1962

1962 (Bluesbreaker)

1962 Front Panel

MAINS STANDBY

JTM

ON ON

																			12	14
SPEED			INTENSITY			PRESENCE				BASS	MIDDLE		TREBLE		VOLUME I		VOLUME II		1	2
4	6		4	6		4	6		4	6	4	6	4	6	4	6	4	6	1	2
2		8	2		8	2		8	2	8	2	8	2	8	2	8	2		8	INPUTS
0	10		0	10		0	10		0	10	0	10	0	10	0	10	0	10	1	2

1962 Rear Panel

	!	WARNING!: RISK OF HAZARDOUS ENERGY	OUTPUT	H.T. FUSE	MAINS INPUT	MAINS FUSE
	!	AVIS!: ENERGIE ELECTRIQUE DANGEREUSE!	OUTPUT	H.T. FUSE	MAINS INPUT	MAINS FUSE
		SPEAKERS
MANUFACTURED BY	FOOTPEDAL	CONNECT SPEAKERS BEFORE USE			117V ~ 60Hz	T1.6A 230V
MARSHALL AMPLIFICATION PLC		OUTPUT: 30 WATTS RMS			117V ~ 60Hz	T1.6A 230V
BLETCHLEY, MILTON KEYNES, ENGLAND.			SELECTOR	T500 mA	175 Watts	T3.15A 117V

ENGLISH

1 2 3 4 5 6 7 8 9 10 11 13 15

1. Power Switch

8. Middle Control

1	2	3	4	5	6	7
1. Footpedal Jack			5. H.T. Fuse

ENGLISH

	On / Off Switch for mains power to the amplifier.	Dictates the middle register of the amplifier.
	Please ensure the amplifier is switched off and	Turning this up will make your guitar sound fatter.
		Conversely reducing the amount of middle in your
	unplugged from the mains electricity supply before
		tone will result in a sharper and thinner guitar sound
	being moved.
		for a more ‘scooped’ tone.

For connection of the supplied footswitch to allow tremelo to be switched on and off.

Note: The tremelo effect will only work when playing through Channel 2.

The correct value of H.T. fuse is specified on the rear panel of the amplifier. Please refer to Important Safety Instructions, page 2.

6. Mains Input

2. Standby Switch

The Standby Switch is used in conjunction with the Power Switch (item 1) to ‘warm up’ the amplifier before use and to prolong the life of the output valves.

When powering up the amplifier always engage the Power Switch (item 1) first. This allows the application of the voltage required to heat the valves to their correct operating temperature. After about 2 minutes, when the valves are up to the correct temperature, the Standby Switch can be engaged. Upon doing this the H.T. (High Tension) which is the high voltage required by the output valves to pass signal (and hence produce sound) is applied.

To prolong valve life, the Standby Switch alone should be used to turn the amplifier on and off during breaks in a performance. Also, upon full power down, always disengage the Standby Switch prior to the main Power Switch (item 1).

3. Indicator

The Indicator will be lit when your amplifier is on and will not be lit when the amplifier is switched off.

4. Speed Control

Controls the speed of oscillation when using the tremelo effect.

5. Intensity Control

Controls the intensity of oscillation (i.e. the effect depth) when using the tremelo effect.

Note: The tremelo effect will only work when playing through Channel 2 of the Bluesbreaker combo.

6. Presence Control

Adds higher frequencies to the guitar tone, creating crispness and bite. Turning this up will make the sound more cutting and ‘present’.

7. Bass Control

Controls the amount of low frequencies or bottom end in your tone.

9. Treble Control

Controls the high frequencies of the guitar tone, making your guitar sound brighter when increased.

(Note: The tone network is highly interactive and altering one control can change the shape of the sound in relation to the other tone controls. Experimentation is the best way to achieve your desired sounds.)

10. Volume I

Controls the overall output level of Channel 1. Note: This channel is voiced for a higher treble response than Channel 2.

11. Volume II

Controls the overall output level of Channel 2. Note: Channel 2 is voiced for normal response.

12. Input Jack

Connects the guitar to Channel 1.

Note: Though the first input of the first channel is the input that most guitarists use, don’t be afraid to experiment. Some guitar players prefer to mix the two channels together by connecting a short, screened patch lead between the second input of Channel 1 and the first input of Channel 2. If you then plug your guitar into the first

input of Channel 1 (item 12), you 1		2
can mix the different tonal		INPUTS
characters of each channel for	1	2
greater flexibility. (See diagram).	1	2
greater flexibility. (See diagram).

13. Input Jack

Connects the guitar to the lower sensitivity input on Channel 1.

14. Input Jack

Connects the guitar to Channel 2.

15. Input Jack

Connects the guitar to the lower sensitivity input on Channel 2.

2/3. Loudspeaker Outputs

These are for connection to either the internal speakers and/or an external load, i.e. speaker extension cabinet(s). (See item 4).

4. Output Selector

Matches the amplifier’s output to the load impedance.

With all-valve amplifiers it is imperative that the amplifier is connected to a load whilst in operation and that the impedance selected on the amplifier matches the total impedance of the internal speakers and/or extension speaker cabinets.

The two internal speakers are 16 Ohms each. These are wired in parallel giving an overall impedance of

8 Ohms, therefore the output selector should be set to 8 Ohms.

If an additional 8 Ohm extension speaker cabinet is used in conjunction with the internal speakers the output selector should be set to 4 Ohms.

Note: No additional extension speaker cabinet with an impedance lower than 8 Ohms should be used in conjunction with the internal speakers.

Failure to comply with these points will result in damage to the amplifier.

Your amp should be completely powered down before the selector is turned.

Your amp is provided with a detachable mains (power) lead which is connected here. The specific mains input voltage rating that your amplifier has been built for is shown on the back panel. Before connecting for the first time, please ensure that your amplifier is compatible with your electricity supply. If you have any doubt, please get advice from a qualified person. Your Marshall dealer will help in this respect.

7. Mains Fuse

The correct value of mains fuse is specified on the rear panel of the amplifier. Please refer to Important Safety Instructions, page 2.

2245, 1987X, 2245 `JTM45, 1962, 1959SLP specifications

Marshall Amplification, a legendary name in the world of electric guitar amplifiers, has played a pivotal role in the music industry since its inception in 1962. The company’s steadfast dedication to craftsmanship and innovation is exemplified in its iconic amp models, such as the JTM45, 1959SLP, and 1987X. These amplifiers have become staples for musicians seeking powerful sound and tone.

The Marshall JTM45, introduced in the early 1960s, was one of the brand's first commercially successful amplifiers. It featured a 45-watt design, driven by two EL34 power tubes, which contributed to its rich and warm tone. The JTM45 utilized a simple layout of just two channels: Normal and Bright, allowing guitarists to achieve a breadth of tonal variety. This model was heavily inspired by the Fender Bassman circuit but refined with Marshall’s distinct twists, giving it a unique British voice. Its durability and versatility made it the choice of many rock legends.

Another notable model is the 1959SLP, referred to as the "Plexi." This 100-watt amplifier gained immense popularity during the late 1960s and early 1970s. Characterized by its four EL34 power tubes and seven preamp tubes, the 1959SLP is famed for its ability to produce a harmonically rich overdrive, perfect for rock and blues music. The amp's straightforward control layout lets players dial in precise tones with ease, encompassing a wide range of sonic possibilities. It has been used by countless famous guitarists, solidifying its status as a rock icon.

The 1987X, a quintessential representative of the Marshall sound, is a 50-watt tube amp that caters to modern musicians wanting classic vibes. This model is designed to replicate the vintage aesthetic and tonal characteristics of its predecessors while incorporating improvements in reliability and practicality. Featuring two channels and a simple control set, the 1987X delivers a powerful crunch that many desire for genres spanning from classic rock to heavy metal.

Marshall Amplification distinguishes itself not only through its iconic amps but also through its commitment to sound quality and performance. The use of premium materials, meticulous hand-wiring in certain models, and a focus on authenticity allow the company to deliver products that resonate with musicians around the world. Ultimately, Marshall’s legacy continues to influence the sound of rock music, forging an unbreakable bond between amplifier technology and the evolving landscape of guitar-driven music.