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Unread 12-18-2009, 02:59 PM   #1 (permalink)
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Cascading preamp stages

When they talk about some JMP's as having the "cascading preamp stage", what does that mean? Is a "cascading preamp" desireable? What is the difference between that and a non-cascading preamp? Thanks in advance.
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Unread 12-18-2009, 08:50 PM   #2 (permalink)
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Re: Cascading preamp stages

Anyone home? Hello...?
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Unread 12-19-2009, 06:04 AM   #3 (permalink)
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Re: Cascading preamp stages

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Originally Posted by LPMarshall hack View Post
When they talk about some JMP's as having the "cascading preamp stage", what does that mean? Is a "cascading preamp" desireable? What is the difference between that and a non-cascading preamp? Thanks in advance.
The same difference between a Super Lead and a Master Volume (i.e 1959/1987 and a 2203/2204).
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Unread 12-19-2009, 04:15 PM   #4 (permalink)
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Re: Cascading preamp stages

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The same difference between a Super Lead and a Master Volume (i.e 1959/1987 and a 2203/2204).

Still not clear. I know to get a SL to distort, you must crank it, where a MV can distort at lower volumes. Does a cascading pre amp stage have something to do with this? I'm still not sure what a cascading pre amp stage is and if it is more desireable. Sorry for being so dense.
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Unread 12-19-2009, 04:44 PM   #5 (permalink)
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Re: Cascading preamp stages

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Still not clear. I know to get a SL to distort, you must crank it, where a MV can distort at lower volumes. Does a cascading pre amp stage have something to do with this? I'm still not sure what a cascading pre amp stage is and if it is more desireable. Sorry for being so dense.
Yes.

"Cascading" refers to the fact that all of the gain stage outputs run into the next gain stage, like a "daisy chain", or like how you hook your pedals up (out from one and into the next). The 2203/04 is set up in this fashion.

This is as opposed to "mixing" gain stages, where the outputs of the first two gain stages are 'mixed' via joining the outputs of the two stages together via a couple of resistors. The 1959/87 circuit is set up in this fashion.
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Unread 12-19-2009, 06:14 PM   #6 (permalink)
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Re: Cascading preamp stages

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Originally Posted by Wilder Amplification View Post
Yes.

"Cascading" refers to the fact that all of the gain stage outputs run into the next gain stage, like a "daisy chain", or like how you hook your pedals up (out from one and into the next). The 2203/04 is set up in this fashion.

This is as opposed to "mixing" gain stages, where the outputs of the first two gain stages are 'mixed' via joining the outputs of the two stages together via a couple of resistors. The 1959/87 circuit is set up in this fashion.

Oh I see, so that's what the patch cables are for on a SL...to mix the gain stages? So most modern amps will have a cascading gain stage then right?
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Unread 12-19-2009, 06:15 PM   #7 (permalink)
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Re: Cascading preamp stages

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Oh I see, so that's what the patch cables are for on a SL...to mix the gain stages? So most modern amps will have a cascading gain stage then right?
Yep...and yep. The patch cable on the SL is just to be able to send your guitar signal to both of the first gain stages vice one or the other. The outputs of those stages are then mixed together.
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Unread 12-20-2009, 01:17 AM   #8 (permalink)
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Re: Cascading preamp stages

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Yep...and yep. The patch cable on the SL is just to be able to send your guitar signal to both of the first gain stages vice one or the other. The outputs of those stages are then mixed together.
I see. So am I correct in assuming that all modern amps have a cascading gain stage? Thanks for your help.
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Unread 12-20-2009, 01:23 AM   #9 (permalink)
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Re: Cascading preamp stages

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I see. So am I correct in assuming that all modern amps have a cascading gain stage? Thanks for your help.
Pretty much...except for the reissue stuff obviously.
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Unread 12-20-2009, 01:38 AM   #10 (permalink)
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Re: Cascading preamp stages

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Pretty much...except for the reissue stuff obviously.

You mean the reissue SLP's right? As always...awesome WILDER!!!
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Unread 12-20-2009, 01:42 AM   #11 (permalink)
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Re: Cascading preamp stages

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You mean the reissue SLP's right? As always...awesome WILDER!!!
Reissue SLP as well as the Bluesbreaker RI...basically any 4-input style Marshall.

And thanks for the kind words.
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