Slaving a Plexi Project

[rockstah]

hhhmmm interesting I thought you left that v1a alone at first. Maybe that would be too much added sizzle? or maybe it might sound like the US Festival 83 sound. It sounded a little over the top maybe he just did a sloppy slave as in instead of changing what you did, left super led spec there .68/ 2.7k then the 002 to the phase invertor. Just a theory ..prob too hot. I just printed all this out. after the amp show anxiety goes away Im going to try all this ,,,,,, sweeeeeet !

here are my thoughts on straight into another plexi and why i ended up modding the second amp.

heres where im at with it...the thing with going into the front of a plexi is that you go through all stages - input stage, tone stage before you hit the phase inverter.
this is wacky for a couple reasons.
first you get either a real thin sound on stock bright channel ( even if u have no bright cap installed )or you get a reall bassy sound on the normal channel and second you get to go through the tone stack. weee!!
sure it would be nice to have that flexibility of having the tone stack in the mix but at the point the circuit would have to be modified anyway to have a more than a few somewhat useful sounds.

i believe at this point that if and when eddy used Marshall's for power amps they had to be modded. they just sound like crap going through everything else in the circuit unmodded.

u could try what u just stated but i would leave out the .022 cap ( series capacitance ) to the phase inverter and get rid of the 1meg/33k grid - oh and that 1 meg volume pot is just too much - I'm using a 250k and thinking of trying a 50k instead.


Mark

[rockstah]

the cracked mirror was courtesy of my cat knocking one off my plexi's of the speaker cab!

just thought i would give a peek to those that were interested.

Mark

[jerrydyer]

thats what you get for putting a plexi in his play area. Was it on at the time? Your lucky you still have a cat. They hear that buzz comming off the A.C and they want to investigate.

[jerrydyer]

looks like a tweakers house. I work for a criminal defense attorney so I know. lay off the meth.

[rockstah]

it was in the middle of the night CRASH! WTF?!?

the pickup is noisy since swapping the magnet - i have to re-pot it or use a hair dryer or something.

[harddriver]

hhhmmm interesting I thought you left that v1a alone at first. Maybe that would be too much added sizzle? or maybe it might sound like the US Festival 83 sound. It sounded a little over the top maybe he just did a sloppy slave as in instead of changing what you did, left super led spec there .68/ 2.7k then the 002 to the phase invertor. Just a theory ..prob too hot. I just printed all this out. after the amp show anxiety goes away Im going to try all this ,,,,,, sweeeeeet !

here are my thoughts on straight into another plexi and why i ended up modding the second amp.

heres where im at with it...the thing with going into the front of a plexi is that you go through all stages - input stage, tone stage before you hit the phase inverter.
this is wacky for a couple reasons.
first you get either a real thin sound on stock bright channel ( even if u have no bright cap installed )or you get a reall bassy sound on the normal channel and second you get to go through the tone stack. weee!!
sure it would be nice to have that flexibility of having the tone stack in the mix but at the point the circuit would have to be modified anyway to have a more than a few somewhat useful sounds.

i believe at this point that if and when eddy used Marshall's for power amps they had to be modded. they just sound like crap going through everything else in the circuit unmodded.

u could try what u just stated but i would leave out the .022 cap ( series capacitance ) to the phase inverter and get rid of the 1meg/33k grid - oh and that 1 meg volume pot is just too much - I'm using a 250k and thinking of trying a 50k instead.


Mark

Sounds good Mark, I remember you not liking the Slave setup a while ago when you tried it then. Mark Cameron stated the setup was SL plexi into a superbass with no birght cap. Currently I use shared cathode SL into a load and then out to a SL with still with a bright cap and .1uf in the PI outputs. I need no EQ up front whatsover and the amps get more than enough gain, I'm running an EP-3 and or the EP-pre up front and that helps alot too. The way they interact with one another is the early boots/VH1 IMO. I think a SL into a SB can do it to, the setup has all the right nuances to it you just have to tweak the Power amp radically different. Plus neither amp needs to be dimmed for the best results.

I've been very happy with my setup for quite some time now.

[rockstah]

i don't hear it working into a stock plexi going in the channel through the tone stack and the input values superbass or not no bright cap etc. its shrill and nasty sounding to my ears.

u need that clean headroom IMHO to get the sound - thats what Eddy's has going on that has been impossible to get with one amp. add that clean power amp and you gain that headroom - that hifi sound eddy has.

post a clip of what u are ending up with cause on my end it just doesn't happen like how u describe. - its nasty sounding!

Mark

[Krinkle]

Bump on the speakers.

What ones did you use on this clip?

[rockstah]

early 90's 16 ohm greenbacks made in england.

[Krinkle]

It would be nice to hear that tone A/B'ed with the album like Rob does. It sounds sooooooo close.

[rgalpin]

i believe at this point that if and when eddy used Marshall's for power amps they had to be modded. they just sound like crap going through everything else in the circuit unmodded.


Mark

i don't think so. i think it sounds great with 2 stock amps. but you have to run it through an EQ between amp 1 and 2 to kill a lot of high end. your setup sounds great but to say that you HAVE to mod the second amp or else it sounds like crap is not so.

you can hook up 2 stock amps together in a slave setup and get great results.

[rockstah]

not that i have heard yet. when u go through the front end of a stock plexi you lose all that headroom that u hear it eds sound. thats what we have been doing by adding a 330u cap to a stock plexi - trying to create that headroom - when you run in the front of another amp it doesn't have that quality that eds sound has - show me clip - lets talk about it. -


Mark

[erigm]

Rockstah,

I would try the two stock plexi's again. If you listen to Atomic Punks comparison of the original vs your clip it seems the original is a little more scooped sounding. That's what the tone stack would give you. Now with a stock plexi (as the second amp) it would have more gain then your second plexi. Using a load with a line out might be too hot a signal for the stock second amp to handle. It was mentioned in another thread that he used a load with a tranny to bring the signal back to high impedance instrument level. This may be the ticket. I'm just saying I wouldn't discredit the dual stock marshall theory until this has been tried, and I think some have done this successfully. It makes sense that this may be the difference between yours and Ed's sound. It would give you more scooped mids, and bringing down the input level would give you back the clean headroom you are looking for. It also makes sense that this is what Ed used. I doubt he had those JTM45's and AC50's modded to be FX loop inputs. My $.02.

[rockstah]

Rockstah,

It was mentioned in another thread that he used a load with a tranny to bring the signal back to high impedance instrument level. This may be the ticket.

u may have something there and using two stock heads... but i hear something in this setup i have not heard in anyone elses clips of their slaved setups and i always contribute it to their setup of two stock amps - that glorious hifi headroom ed has is nonexistent in their clips....

u have me thinking though and i do have another plexi spec here to try..... - any idea where the thread is that talks about the load with the tranny to bring the signal back to high impedance instrument level?

[Gainfreak]

Hey Mark!!! Wassup!

Mark cameron told me about the Jose load box 2 years ago and he told me that the load box had to have a transformer or something in it to make it sound right. I also remember him telling me that if you didn't use the box that it would sound like total crap plugging one plexi into another lol
He even mentioned that in his original post when he first talked about it here and I have been wondering why no one has ever tried to re-create what he was talking about?. I mean people did try what he was talking about but they never built the load box. I know tha Rgalpin tried it but he was using an EQ to tame the level going into the other amp but that still wasn't what Mark was talking about. Im really not the handiest guy otherwise I would have done this already 2 years ago lol. I watched countless guys give the 2 amp thing a whirl but no one made the correct load box. I just sat there scratching my head wondering why lol This is the only reason why I asked you before as to why you modded the second amp is becuase I though you were going by what Mark said.
I think that you are scary close and Id love for you to pick Mark Camerons brain because id love to hear what he was talking about in person! george had it hooked up in the metro room a few years back and I was to busy screwing around at the show and never got to hear it!!

Mark showed me the load box at the Ny amp show 2 years ago and he also posted pictures of it.

All the best!!


Ralph