Marshall Amplification JCM800 Series - Manual (Page 25)

Marshall Amplification Product Catalogue 47
“Marshall have always been the best . . .
and they still are.”
Jerry Horton
(Papa Roach)
Rack Power-Amp Products
EL84 20/20 • EL34 50/50 • EL34 100/100
46 Marshall Amplification Product Catalogue
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
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!
From top to bottom:
EL84 20/20
EL34 50/50
EL34 100/100
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
POWER AMP SPECIFICATION
“It’s the rack from hell which needs earplugs.”
Phil Campbell
(Motorhead)