S.I.R. 100W SuperLead Schematic pt. II

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Unique
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by Unique » Fri Apr 23, 2021 6:19 am

gluke wrote:
Thu Apr 22, 2021 8:26 am
This is the video I was talking about (I'm sure it's somewhere in this tread already) at 15:30 somthin' he switches the EQ in and out on the SM57. A lot more mid and hi boost than I had expected.

https://www.youtube.com/watch?v=Cz65qfczRmw

If you start tweaking your amp after that kinda EQ boost it ends up way too bright, or you get carried away and overcomplicate things trying to mimic the studio EQ.
That's how it is with mixing and recording. You have to get the guitar thin in the mix, while still sounding good, so it will leave room for the vocals and other instruments while sitting well in the mix. What's amazing with our human hearing is that, as listeners our ears will 'fill in' the missing lows from the guitar tracks. Now, unless your someone who practices focusing in on the guitars tracks in a mix, you'll train your ears to hear what you hear and you won't notice this phenomenon.

I've seen that video and over at SOS's website they have a good article with a lot of detail on how Eric recorded Slash's album. Even though Eric is A/B'ing the high EQ in this video, and it sounds like the amp isn't as bright without it, there's still a lot of high end roll-off from the original signal from the speakers due to signal chain from the speaker through all of the outboard gear, including the console itself. So you can rest assure that the sound coming from the amp is somewhat brighter than what your hearing when he takes the high EQ off.

The way Eric recorded Slash for his solo albums was quite a bit different than how Mike Clink produced AFD back in the day. You can throw UYI in there as far as that goes as well. With AFD, they used a Trident 80B board, and with UYI, SSL4000 consoles were used. Both have a different sound from one another, and different from what Eric's custom made board sounds like. Eric also used several different mic and blended them to get Slash's sound, so that will have an effect too, versus the one mic setup plus room mics with Clink. These are just a few of the differences you hear with character of Slash's sound. I guess mainly with #34 here since #36 was only used on AFD. But good stuff here with what Eric shares.

Here's the article over at soundonsound:

https://www.soundonsound.com/people/sec ... -valentine

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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by Unique » Fri Apr 23, 2021 6:39 am

gluke wrote:
Fri Apr 23, 2021 5:00 am
Raw amp mod (#36 with no #34 tuning):

Nightrain
https://www.youtube.com/watch?v=aXo-LdDas3o

WTTJ
https://www.youtube.com/watch?v=UGkOm7sN48I
I've enjoyed all of the samples you've posted. They're all good and very close. Your definitely at the steps, even knocking on the door. I have a feeling that sound is going to answer soon and you'll be in the door in no time!

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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by gluke » Fri Apr 23, 2021 6:40 am

CoffeeTones wrote:
Fri Apr 23, 2021 5:04 am
That seems to be one of the easier ones to me. You should learn it pretty quick.
My fingers did not agree with you on that one.....

https://youtu.be/cSH98gvgeF0
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by gluke » Fri Apr 23, 2021 6:55 am

Unique wrote:
Fri Apr 23, 2021 6:39 am

I've enjoyed all of the samples you've posted. They're all good and very close. Your definitely at the steps, even knocking on the door. I have a feeling that sound is going to answer soon and you'll be in the door in no time!
Thank you. I will pop in the 6550s 'cause I have a set around here somewhere, but apart from that I don't think I will spend much more time on this unless I have a more decent way of recording and EQ-ing it. Comparing iPhone clips to a studio recording doesn't really get me anywhere from here.
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by gluke » Fri Apr 23, 2021 9:13 am

CoffeeTones wrote:
Thu Apr 22, 2021 4:56 am
Yeah, I don't think 36 was bright and thin as most think. I believe it is a Levi, MK spec that will probably never make it to the internet.
This is not thin sounding in the room at all, quite the opposite. If I had been able to borrow this amp in 1986 I would have stolen it too......
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by gluke » Fri Apr 23, 2021 9:50 am

snakepit86 wrote:
Thu Apr 22, 2021 7:32 pm

It is common to attenuate some bass in the recording and remember that Mike Clink said in a circa 2002 interview for the 15th AFD anniversary that he used the Roland SRV 2000 reverb and the dbX 160 compressors to shape the tone and Mike Barbiero and the other guy (sorry i do not remember his name now :peace: ) said that they used the Pulteq racks to boost the mids in the mastering

By the way, there is some Pulteqs pluguins, they are great to do some tweaking and mixing guitars
Lee Jackson tone-talked about delivering EVHs #1 back to 5150 after fixing the blown OT and he said he thought it still was broken when he fired it up again in the studio. sounded nothing like what he expected. Then he went into the mixing room where EVH was and out of the monitors after the Pulteqs and compressors it sounded just like the records.....

I know it's a tangent but another guy with quite bright recorded guitar tones and Pultecs....
Last edited by gluke on Fri Apr 23, 2021 10:44 am, edited 1 time in total.
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by gluke » Fri Apr 23, 2021 10:28 am

CoffeeTones wrote:
Thu Apr 22, 2021 1:41 pm
That mod often sounds better with a 2n2 coupling cap at stage 1. It calms the amp some, an pulls some bass, boosts mids. Works better in 100 vs 50 watt amps. Works good with .68u presence cap as well. 3k3 //.68u works well on stage 1 too. Another sort of off topic thing - Some miss that Santiago drew a switch on the schematic showing 34 possibly offered ability to be used with no bright cap.
Well, just because I don't like it doesn't mean we can't try it and I have alot of 2n2 sozo caps laying around...... So now it's 2n2 on the added first stage as well. Brighter and more honky. Sounds really good on lead stuff, but the only Slash solo I know is not from AFD......

Nightrain
https://www.youtube.com/watch?v=476_Z4xqbRA

WTTJ
https://youtu.be/zWZMhVdVaTA
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by CoffeeTones » Fri Apr 23, 2021 1:45 pm

gluke wrote:
Fri Apr 23, 2021 10:28 am
CoffeeTones wrote:
Thu Apr 22, 2021 1:41 pm
That mod often sounds better with a 2n2 coupling cap at stage 1. It calms the amp some, an pulls some bass, boosts mids. Works better in 100 vs 50 watt amps. Works good with .68u presence cap as well. 3k3 //.68u works well on stage 1 too. Another sort of off topic thing - Some miss that Santiago drew a switch on the schematic showing 34 possibly offered ability to be used with no bright cap.
Well, just because I don't like it doesn't mean we can't try it and I have alot of 2n2 sozo caps laying around...... So now it's 2n2 on the added first stage as well. Brighter and more honky. Sounds really good on lead stuff, but the only Slash solo I know is not from AFD......

Nightrain
https://www.youtube.com/watch?v=476_Z4xqbRA

WTTJ
https://youtu.be/zWZMhVdVaTA
Yep, sounds closer to the recorded tone to me. Probably a good " live tone" to sit in a mix.

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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by gluke » Sat Apr 24, 2021 2:34 am

CoffeeTones wrote:
Fri Apr 23, 2021 1:45 pm

Yep, sounds closer to the recorded tone to me. Probably a good " live tone" to sit in a mix.
Yeah, doesn’t it? I wasn’t expecting that. Life is odd. I was working from home yesterday and feeling kinda finished with this, but I kept looking at the amp thinking about your comment and how all those mods at that time were kinda bright sounding, so why not? It will take me 10 sec to switch that cap. I was kinda undecided when I recorded the clips, but listening to the album loud in my car later I agree.

Oh well, now we are back to just what Duke described back in 2016 so welcome back to 5 years ago, ha ha ha...... The first two stages are just like that 80s mod. It did make the amp less chuncky and more gritty, but sounds really good on the lead stuff too now.
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by gluke » Sat Apr 24, 2021 11:06 am

Well it would be unfortunate to stop now that we are on a roll. So I popped in the 6550s.... Opened up the amp a bit more. Not so compressed as the El34s. So more presence and headroom.

Nightrain with 6550s:
https://www.youtube.com/watch?v=g6bdzhrJb_4
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by gluke » Sat Apr 24, 2021 11:10 am

Even attempted on of the SCOM solos bits. It was actually quite hard 'cause Slash plays this without any vibrato?!?!?!? Every time I tried it record it, it sounded like freakin Zakk Wylde playing SCOM...... but damn playin without vibrato is just plain wrong!!! What the hell were they doin!

SCOM solo bit:
https://www.youtube.com/watch?v=dJl52rUByRg
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by CoffeeTones » Sat Apr 24, 2021 11:36 am

Not sure what you have in place now, but it sounds like it needs ceramic caps across the 470k before the gain pot and / or on the 470k peaker / divider with those 6550 tubes.

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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by gluke » Sat Apr 24, 2021 12:06 pm

CoffeeTones wrote:
Sat Apr 24, 2021 11:36 am
Not sure what you have in place now, but it sounds like it needs ceramic caps across the 470k before the gain pot and / or on the 470k peaker / divider with those 6550 tubes.
There are no 470k there in that 80s mod. The 470p is still on the mixer deviders. But in that 80s mod the 5000p bright cap is still in there. I got no bright cap right now, so that’s the only thing left to play with. What du wanna hear first? 120p? 250p? 470p?
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by CoffeeTones » Sat Apr 24, 2021 12:17 pm

Depends on the pot rotation / position at your preferred volume - just have to get in there and listen to different ones. Might start with 220 - 500pF.

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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by gluke » Sat Apr 24, 2021 12:20 pm

Then I got something to do tomorrow as well......

Have to see what I got in ceramic.
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