Marshall JTM45 Handleiding
Marshall
Gitaarversterker
JTM45
Lees hieronder de 📖 handleiding in het Nederlandse voor Marshall JTM45 (5 pagina's) in de categorie Gitaarversterker. Deze handleiding was nuttig voor 72 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld
Pagina 1/5
1
From the Chairman
Congratulations on your purchase of this limited
edition, 40th Anniversary, hand wired JTM45/100 Dual
Output 100 Watt, all-valve head and accompanying pair
of 4x12 cabinets.The original version of this world
famous amplifier was built in late 1965 at the request of
the young rock musicians of that period. I was being
asked to provide bigger and louder amplification to
accommodate the harder edge and aggression of this
younger generation’s take on rock and roll and blues. I was
only too happy to accept this challenge!
My team of engineers set to work using a JTM45 with two
power sections as the basis for the very first Marshall 100 watt
head and in November 1965 these formidable amps with
accompanying 8x12 cabs made their stage debut.The original 8x12s
proved too bulky for transportation and were returned in favour of stacking
two 4x12 cabinets, one on top of the other.Thus the Marshall ‘stack’ was born.
This authentic replica stack and head celebrates the fortieth anniversary of this much documented
episode in rock music history and is par oing series,t of an ong featuring hand wired re-issues of
revered historical Marshall Products.The reason I have decided to do this is simple - public demand!
Marshall’s reputation and longevity has evolved as a result of the philosophy behind the design and
build of our amplifiers. Our design engineers are nearly always guitarists and have the benefit of
developing our products from both musical and electronic view points.Anybody who appreciates
great vintage tone will enjoy the magic contained within this milestone of electric guitar amplification.
These vintage tones are still to this day regarded as benchmarks.
At a time when the face and sound of popular music was rapidly changing, players were constantly
pushing back and redefining musical boundaries.The JTM45/100, with its relatively simple controls,
features and circuitry was there on the front line at the beginning of this music revolution.
I sincer handwirely hope that this unique looking and sounding, ed landmark of Marshall history will
provide you with countless hours of playing pleasure, inspiring you to push musical boundaries even
further…just like the famous players of the originals did!
Yours Sincerely,
ENGLISH
2
Overview: Historical,Tone and Tech Talk
The JTM45/100 is a Class-A/B, all-valve, 100 Watt head with two channels (High
Treble & Normal) that share tone controls. Our goal for this handwired re-issue
is both obvious and simple – to make it as identical to the late 1965 made
originals as possible.To this end the circuit,cosmetics, construction,sound and
all-important dynamic characteristics all have to be 100% correct – and they are.
We went to incredible lengths to achieve maximum authenticity and are
delighted to report that our suppliers were equally as exacting in their tasks
As ‘the Guv’nor,’ Dr. Jim Marshall, has already stated,this head first saw the light
of day in late 1965 and was affectionately named the JTM45/100 because of the
continued use of the JTM45 preamp section and also its front panel.Because
original JTM45/100’s are extremely rare and collectable,we had to travel to
various parts of the world to examine other originals in addition to closely
examining many photographs kindly provided by the lucky few owners.Slight
circuit variations were apparent between models due to Marshall’s ongoing
development of the 100 watt amplifier at that time.
The circuit we have revisited for the JTM45/100 is vastly different to the later
circuit we use for our critically acclaimed, late 60s Plexi re-issue, the 1959HW.
The most relevant technical departures in question lie in the dual output
transformers,Power Supply Topology and the use of KT66 power valves just like
the originals.
As you can see from its front panel layout,the JTM45/100 is an extremely
straightforward amplifier. Its two channels – High Treble and Normal - each have
two inputs (High and Low sensitivity) and separate Loudness (volume) controls.
Both channels share the amplifier’s four tone controls:Treble, Middle,Bass and
Presence. Like all Marshall valve amplifiers,the JTM45/100 performs at its very
best when turned up to deliver your personally preferred dynamic range. Due to
its power rating and astonishing projection, it can be a formidable live amplifier in
even the largest of venues. y its imprA truth bore out b essive history time-and-
time again.
The JTM45/100’s organic, vibrant,sweetly distorted, harmonically rich and thick musical tone emanates from its power
valves being driven into a dual 50 watt output stage When . ‘cranked,’ the JTM45/100 produces its own unique roar
with an inspiring ‘punch you in the chest’ clout. It reacts superbly to the guitar’s volume control / player feel
combination and,not surprisingly, responds exceedingly well to picking dynamics too. From ‘in-your-face’ when you play
with unbridled aggression to subtle ‘in your ear’ blues caresses when you pull back and turn down…just like the
celebrated masters of the day.
The speaker cabinets in the Anniversary Stack,812T40 and 812B40, have been designed to recreate the majestic look
of the original 8x12s when stacked.We could, of course, have replicated the 8x12 but in consideration to your back
(and your roadies!) we decided that dividing it into two 4x12s was much more sensible! Just like the original 8x12,
both cabs are loaded with Celestion’s highly celebrated T652 Alnico Speakers.The angled top cabinet also features a
semi-open back,just like the genuine 8x12 reference we took our dimensions from.
Technical Information
Components: Wherever and whenever possible, we have gone back to the original manufacturers for all
components to maintain the highest quality and to ensure maximum authenticity.
Valve compliment: Three ECC83s (12AX7s) in the pre-amp and a quartet of KT66* power valves working in push-
pull.All valves are of the highest quality available and are subjected to our usual meticulous grading and testing
processes.
*KT66: these output valves were standard issue on mid sixties Marshall Amplifiers yielding a fat, round tone that has a
distinctly vintage flavour.
ENGLISH
Product specificaties
| Merk: | Marshall |
| Categorie: | Gitaarversterker |
| Model: | JTM45 |
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