Rack Power-Amp Products

EL84 20/20 • EL34 50/50 • EL34 100/100

Phil Campbell

(Motorhead)

Nothing beats the musical roar of a British valve power amp – and nothing roars with more tuneful power than a Marshall.

Our expertise in making full use of the tonality offered by valves has led to our valve-driven power amps becoming revered by musicians the world over and as a result all three models in our power amp range will breathe new life back into the sound of your rack.

EL84 20/20 Valve Power Amp

For the player who wants portability coupled with great Marshall valve tone, we offer the EL84 20/20. This compact, single space, rack-mountable power amp packs 20 Watts + 20 Watts of Marshall valve power. Its quartet of EL84 power valves offers impressive clean headroom, in addition to the magnificent overdriven tones it exudes. A unique Deep switch brings in state-of-the-art, resonance circuitry which works with the speaker cabinet(s) being driven and results in a tight, low-end boost which can’t be mimicked via pre-amp EQ. The unit’s Presence control and Line Level outputs add further to the flexibility of the EL84 20/20’s superb natural tone. Surprisingly loud, the fan-cooled EL84 20/20 is ideal for both studio and live work where valve-driven, harmonically rich tone is a must.

EL34 50/50 & EL34 100/100 Valve Power Amp

Marshall 50 Watt and 100 Watt, EL34-driven, valve power stages are, in the minds of many, the ‘industry standard’. As soon as you hear our EL34 50/50 (50 Watt + 50 Watt) and EL34 100/100 (100 Watt + 100 Watt) valve power amps, you will immediately understand why. Both of these eye-catching units are packed to the brim with Marshall valve tone. Just like expensive hi-fi amps, both the EL34 50/50 and EL34 100/100 are Dual MonoBloc amplifiers – meaning

Jerry Horton

(Papa Roach)

“Marshall have always been the best ...

and they still are.”

that each side (channel) of the stereo amplifier operates as a completely independent unit.

Each channel features its own Gain and Presence controls and our highly specialised ‘True Differential Inverter’ circuitry, ensures that the maximum integrity and pureness of their valve tone is maintained at all times. Each channel also boasts a remotely switchable ‘Voice’ switch which takes you from ‘traditional’ (Voice A) to ‘modern’ (Voice B) and will allow you to cut through any mix. The EL34 50/50 and EL34 100/100 – professional, all-valve power amps that sound as good as they look!

POWER AMP SPECIFICATION

FEATURES	EL84 20/20	EL34 50/50	EL34 100/100

Output (RMS)	20 + 20 Watt	50 + 50 Watt	100 + 100 Watt

Volume Control	1 x Stereo	1 per Channel	1 per Channel
Presence Control	1 x Stereo	1 per Channel	1 per Channel
Voicing Options	Resonance	A/B	A/B
Remote Resonance Switching	✓	No	No
Remote A/B Switching	No	✓	✓
Impedance Selection	✓	✓	✓
Line Level Output	✓	No	No
Link Output	No	✓	✓
Power Amp Valves	4 x EL84	4 x EL34	8 x EL34
Pre-Drives	1 x ECC82	2 x ECC83	2 x ECC83
Phase Inverters	2 x ECC83	2 x ECC81	2 x ECC81
Footswitch (not supplied)	PEDL-10008	PEDL-10008	PEDL-10008
Dimensions (mm)	(270mm Deep)	(330mm Deep)	(330mm Deep)
	1U Rack	3U Rack	3U Rack
Weight (kg)	5	19	20.5

“It’s the rack from hell which needs earplugs.”

From top to bottom:

EL84 20/20

EL34 50/50

EL34 100/100

46	Marshall Amplification Product Catalogue

Marshall Amplification Product Catalogue

JCM800 Series specifications

Marshall Amplification is synonymous with rock music, and the JCM800 series is one of its most iconic models. Launched in the early 1980s, the JCM800 series redefined high-gain amplification and became a staple for countless rock and metal guitarists. Known for its raw power and tonal versatility, the JCM800 has left an indelible mark on the music industry.

One of the defining features of the JCM800 series is its pure, aggressive sound. At the heart of these amplifiers lies a high-gain preamp circuit, which delivers a rich, harmonically complex tone that is ideal for modern rock styles. The JCM800 offers a variety of wattage options, typically ranging from 50 to 220 watts, allowing players to choose the right power for their sound and performance environment.

The classic EL34 power tubes serve as the backbone of the JCM800's tone. These tubes provide a warm, dynamic response and a pronounced midrange that perfectly complements the heavy distortion and sustain the amp is known for. The two-channel setup—commonly featuring a "Normal" and a "Overdrive" channel—grants players flexibility in their sound. The Normal channel is perfect for achieving clean tones, while the Overdrive channel unleashes an intense crunch that can be dialed in to suit any style.

Control features on the JCM800 amplifiers are straightforward yet effective. Simple tone controls—bass, middle, treble—allow players to sculpt their sound easily. The added presence and resonance controls enhance the amp's response, delivering everything from bright, cutting tones to thick, powerful sounds ideal for heavy riffs.

Another key technology in the JCM800 series includes the use of PCB (printed circuit board) design, improving reliability while maintaining an accessible serviceability profile. Marshall also incorporates features like series effects loops, allowing musicians to integrate their favorite pedals effortlessly.

The JCM800 has become a beloved choice for many legendary guitarists, with its sound frequently associated with iconic recordings from bands such as Guns N’ Roses, Metallica, and Nirvana. Available in various configurations, including heads, combos, and cabinets, the JCM800 series remains a cutting-edge line of amplifiers that capture the essence of rock music. Its rich history, combined with its powerful features, continues to inspire guitarists around the world. With the JCM800, Marshall Amplification has solidified its status as a pillar in the foundation of rock tone.