Marshall pre PI MV to Post PI
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Marshall pre PI MV to Post PI
Hey All,
Is it worthwhile changing the pre P.I. Master Volume on my Marshall 2204 to a Post P.I.? This is a simple change but I was wondering if there would be enough tonal difference to make it worthwhile.
Any thoughts?
Cheers, Mike
Is it worthwhile changing the pre P.I. Master Volume on my Marshall 2204 to a Post P.I.? This is a simple change but I was wondering if there would be enough tonal difference to make it worthwhile.
Any thoughts?
Cheers, Mike
The Jammy Dodger
Re: Marshall pre PI MV to Post PI
Yes. Much of teh tonal characteristics of a Marshall come from the PI being overdriven.
Re: Marshall pre PI MV to Post PI
Do both.
Keep the Pre PI MV and add the Post PI MV.
2203 + LarMar PPIMV. =
It is the current fun to play favorite over at metroamp.
"Rockstah" sets his 2203 up this way, uses plexi era filtering and calls it the "mod 5"
Keep the Pre PI MV and add the Post PI MV.
2203 + LarMar PPIMV. =
It is the current fun to play favorite over at metroamp.
"Rockstah" sets his 2203 up this way, uses plexi era filtering and calls it the "mod 5"
dealer: allparts, weber, antique electronic supply
Re: Marshall pre PI MV to Post PI
Man I love the 2204 the way it is.
Are you looking for more bit in the gain with lower overall volume?
Mark
Are you looking for more bit in the gain with lower overall volume?
Mark
Re: Marshall pre PI MV to Post PI
As you said it is a simple change, why not just try it out?
Re: Marshall pre PI MV to Post PI
yes, do both.
Mark
Mark
Rockstah Amps: http://www.rockstahamps.com
Rockstah Amps Youtube: http://www.youtube.com/user/RockstahAmps
Builds and modification sound files: http://www.soundclick.com/rockstahplexitweaksandmods
Rockstah Amps Youtube: http://www.youtube.com/user/RockstahAmps
Builds and modification sound files: http://www.soundclick.com/rockstahplexitweaksandmods
Re: Marshall pre PI MV to Post PI
topbrent wrote:Do both.
Keep the Pre PI MV and add the Post PI MV.
2203 + LarMar PPIMV. =
It is the current fun to play favorite over at metroamp.
"Rockstah" sets his 2203 up this way, uses plexi era filtering and calls it the "mod 5"
the thing I did was understand that you need to get the volumes up loud in a cascaded gain stage amp to have it sound good.
While guys were doing one or the other( pre or post master) i did both masters in one amp. of course there is still some tweaking to do after that but thats was what I did.
If your 2203/2204 sounds like this you got it right - http://www.youtube.com/user/RockstahAmp ... 5sco_gLFas
Mark
Rockstah Amps: http://www.rockstahamps.com
Rockstah Amps Youtube: http://www.youtube.com/user/RockstahAmps
Builds and modification sound files: http://www.soundclick.com/rockstahplexitweaksandmods
Rockstah Amps Youtube: http://www.youtube.com/user/RockstahAmps
Builds and modification sound files: http://www.soundclick.com/rockstahplexitweaksandmods
Re: Marshall pre PI MV to Post PI
That tone is awesome.rockstah wrote:topbrent wrote:Do both.
Keep the Pre PI MV and add the Post PI MV.
2203 + LarMar PPIMV. =
It is the current fun to play favorite over at metroamp.
"Rockstah" sets his 2203 up this way, uses plexi era filtering and calls it the "mod 5"
the thing I did was understand that you need to get the volumes up loud in a cascaded gain stage amp to have it sound good.
While guys were doing one or the other( pre or post master) i did both masters in one amp. of course there is still some tweaking to do after that but thats was what I did.
If your 2203/2204 sounds like this you got it right - http://www.youtube.com/user/RockstahAmp ... 5sco_gLFas
Mark
dealer: allparts, weber, antique electronic supply
Re: Marshall pre PI MV to Post PI
HOW DO i change A master volume Marshalls from pre PI master to post PI master. everyone here says its easy ,I dont knkow where the phase invertor tube is - I'm not an Amp builder just on that quest for Tone -, my amp MArshall Jtm 30 ,whats the first thing I do ? does it requier Physically adding another tube /and tube mount or is it just moving tubes around ? Any help appreciated
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Re: Marshall pre PI MV to Post PI
Ruh-roh...
Please understand that IMO an answer to this question is of no practical relevance at all. - Max
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Re: Marshall pre PI MV to Post PI
You just move the MV to after the PI.
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
Re: Marshall pre PI MV to Post PI
Rooster1, do you know how to read a schematic, safely discharge capacitors, solder, etc.?
Reading required: http://ampgarage.com/forum/viewtopic.php?t=9023
Reading required: http://ampgarage.com/forum/viewtopic.php?t=9023
I build and repair tube amps. http://amps.monkeymatic.com
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Re: Marshall pre PI MV to Post PI
Wow. Just did this along with the mod5 specs I could find and I think I am done with my plexi mods, for now. This is amazing. Amp sounds really big. Thanks a bunch!topbrent wrote:Do both.
Keep the Pre PI MV and add the Post PI MV.
2203 + LarMar PPIMV. =
It is the current fun to play favorite over at metroamp.
"Rockstah" sets his 2203 up this way, uses plexi era filtering and calls it the "mod 5"
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Re: Marshall pre PI MV to Post PI
In this diagram... http://metroamp.com/wiki/index.php/Imag ... PPI-MV.jpg
what are the 2.2M resistors for, or better yet what if i don't use them? I ask because i did this type of master before and didn't care for it, but i didn't add those resistors so i'm curious what the do. Looks like they just mod the taper, huh?
what are the 2.2M resistors for, or better yet what if i don't use them? I ask because i did this type of master before and didn't care for it, but i didn't add those resistors so i'm curious what the do. Looks like they just mod the taper, huh?
Re: Marshall pre PI MV to Post PI
NO, those resistors allow there to be a bias voltage if the pot fails.
I build and repair tube amps. http://amps.monkeymatic.com