The Manual is here:
http://www.marshallamps.com/product.asp ... =DOWNLOADS
Marshall JVM info live on Marshall site
Moderated By: mods
-
Mike
- I like EL34s
- Posts: 39170
- Joined: Thu Apr 20, 2006 8:30 am
- Location: Edinburgh, Scotland
- Contact:
Marshall JVM info live on Marshall site
http://www.marshallamps.com/product_ran ... RangeId=24
The Manual is here:
http://www.marshallamps.com/product.asp ... =DOWNLOADS
The Manual is here:
http://www.marshallamps.com/product.asp ... =DOWNLOADS
-
Mike
- I like EL34s
- Posts: 39170
- Joined: Thu Apr 20, 2006 8:30 am
- Location: Edinburgh, Scotland
- Contact:
Did you not know that? It's a really clever design idea - and fucking smart too.
Lead broken? Easy to replace... it'll be using some propreitary semaphore handshake or something - clever stuff. I'm going to go and play one in Stevenage at some point to see what it's really like. Speed of the channel switching is what concerns me the most -my 6100 is lightning fast and MIDI so maybe this is OK.
My DSL combo and Gareth's TSL combo are both built as two separate amps as channels switchable by relay for isolation from each other and the switching has a slight delay and ducking in sound. I'm hoping this isn't the case.
I bet your DSL is instantaneous when you switch it as it's just the preamp config that's changing right?
Lead broken? Easy to replace... it'll be using some propreitary semaphore handshake or something - clever stuff. I'm going to go and play one in Stevenage at some point to see what it's really like. Speed of the channel switching is what concerns me the most -my 6100 is lightning fast and MIDI so maybe this is OK.
My DSL combo and Gareth's TSL combo are both built as two separate amps as channels switchable by relay for isolation from each other and the switching has a slight delay and ducking in sound. I'm hoping this isn't the case.
I bet your DSL is instantaneous when you switch it as it's just the preamp config that's changing right?
Coolness. Luckily, I'm fortunate enough to have a great amp tech about 5 minutes drive from my place.
The dude is great, knows shit loads about amps (fixed my DSL50 when the switching circuit went kerblooey) and just made a 20w single channel JCM800 copy (2203/2204 I guess)- a friend in a local band has had it on loan, says it sounds awesome. I think he's gonna start making 'em to order, so maybe I'll be able to afford a 800 of some sorts at some point after all
The dude is great, knows shit loads about amps (fixed my DSL50 when the switching circuit went kerblooey) and just made a 20w single channel JCM800 copy (2203/2204 I guess)- a friend in a local band has had it on loan, says it sounds awesome. I think he's gonna start making 'em to order, so maybe I'll be able to afford a 800 of some sorts at some point after all
-
Mike
- I like EL34s
- Posts: 39170
- Joined: Thu Apr 20, 2006 8:30 am
- Location: Edinburgh, Scotland
- Contact:
Just reading through the manual now - looks like the Crunch channel on here is a direct copy of my 6100 Crunch channel (all three modes are the same), the advantage with the JVM being that you can footswitch between them, which isn't the case on my amp.
"2. CRUNCH CHANNEL
At this point the JVM reverts to the more typical
Marshall preamp circuit characteristic of ?gain
then tone?. This is also true of the OD1 and OD2
channels.
CRUNCH GREEN MODE: This mode shares
the preamp topology of the classic Marshall
JTM45/1959 ?Plexi? models (i.e.: gain + gain +
tone) but with a bit more of gain than is found in
the originals.
CRUNCH ORANGE MODE: This mode is
reminiscent of the Marshall JCM800 2203
amplifier, a staple of hard rock. The gain
structure is gain + gain + gain + tone.
CRUNCH RED MODE: this shares the topology
of the Orange mode but with more gain, giving
you sounds similar to a hot-rodded JCM800."
Which means it'll sound damn good, the Clean Channel looks fun too:
"CLEAN CHANNEL
CLEAN GREEN MODE: This is the cleanest of
the three modes and, in keeping with traditional
clean amps it uses a simple and straightforward
circuit, keeping the signal as pure as possible.
In this Mode the channel?s Volume control is
taken out of circuit as is the case in vintage
amplifiers of this nature. This is the only JVM
mode where this happens.
CLEAN ORANGE MODE: By adding another
gain stage after the tone stack we get a
punchier sound that?s easy to overdrive. As in
the rest of the modes the channel's Volume
control is now active.
CLEAN RED MODE: This mode pushes the
original clean sound even more and transforms
itself into a pseudo high gain channel with the
addition of yet another gain stage after the tone
stack.
In keeping with the classic clean amps of
yesteryear, all three modes of this channel
feature what is known as a pre-gain tone stack
(i.e. the tone network lies before the channel's
main gain stage). The reverse (i.e. the tone
network being after the main gain stage) is
typical of most Marshalls and, as a result, the
Clean channel's tone controls work in a slightly
different way than you might expect. In addition
to controlling the tone of the channel they also
affect how it reacts in terms of gain, allowing
you to shape how the signal distorts.
For example, turning up the Middle control on
higher Gain settings will focus the distortion
there, making your sound ?sing? in a traditional
blues/rock way. Also, because of the channels?
?tone then gain? topology, when a lot of gain is
dialled in (especially in the case of the RED
mode), it may appear that its tone controls aren't
doing as much as you?d expect or sound over
distorted. This is because the signal is being
distorted after the tone stage, minimising the
effectiveness of the Bass, Middle and Treble
controls."
if I ever did buy one I reckon all my presets save one for heavy tones would be set to the different modes on the Clean and Crunch channels.
"2. CRUNCH CHANNEL
At this point the JVM reverts to the more typical
Marshall preamp circuit characteristic of ?gain
then tone?. This is also true of the OD1 and OD2
channels.
CRUNCH GREEN MODE: This mode shares
the preamp topology of the classic Marshall
JTM45/1959 ?Plexi? models (i.e.: gain + gain +
tone) but with a bit more of gain than is found in
the originals.
CRUNCH ORANGE MODE: This mode is
reminiscent of the Marshall JCM800 2203
amplifier, a staple of hard rock. The gain
structure is gain + gain + gain + tone.
CRUNCH RED MODE: this shares the topology
of the Orange mode but with more gain, giving
you sounds similar to a hot-rodded JCM800."
Which means it'll sound damn good, the Clean Channel looks fun too:
"CLEAN CHANNEL
CLEAN GREEN MODE: This is the cleanest of
the three modes and, in keeping with traditional
clean amps it uses a simple and straightforward
circuit, keeping the signal as pure as possible.
In this Mode the channel?s Volume control is
taken out of circuit as is the case in vintage
amplifiers of this nature. This is the only JVM
mode where this happens.
CLEAN ORANGE MODE: By adding another
gain stage after the tone stack we get a
punchier sound that?s easy to overdrive. As in
the rest of the modes the channel's Volume
control is now active.
CLEAN RED MODE: This mode pushes the
original clean sound even more and transforms
itself into a pseudo high gain channel with the
addition of yet another gain stage after the tone
stack.
In keeping with the classic clean amps of
yesteryear, all three modes of this channel
feature what is known as a pre-gain tone stack
(i.e. the tone network lies before the channel's
main gain stage). The reverse (i.e. the tone
network being after the main gain stage) is
typical of most Marshalls and, as a result, the
Clean channel's tone controls work in a slightly
different way than you might expect. In addition
to controlling the tone of the channel they also
affect how it reacts in terms of gain, allowing
you to shape how the signal distorts.
For example, turning up the Middle control on
higher Gain settings will focus the distortion
there, making your sound ?sing? in a traditional
blues/rock way. Also, because of the channels?
?tone then gain? topology, when a lot of gain is
dialled in (especially in the case of the RED
mode), it may appear that its tone controls aren't
doing as much as you?d expect or sound over
distorted. This is because the signal is being
distorted after the tone stage, minimising the
effectiveness of the Bass, Middle and Treble
controls."
if I ever did buy one I reckon all my presets save one for heavy tones would be set to the different modes on the Clean and Crunch channels.
