stinkfeet
New member
So, this summer, I very luckily got some gut shots of one of Brent Gutierrez's modded amps from a very awesome guy. So I was able to make a good scheme for it. I finally got some free time to wrap everything up on this killer preamp I built on a tight budget.
This is a wicked circuit, as you can imagine. The only changes I've made are adding a tone stack switch to go from 270p/56k to 33k/470p, and a switch that changes the last voltage divider. I mainly just leave it in the normal position. Remarkably, for having 5 gain stages and no gate, it's dead quiet when I plug straight in. This is one of the first amplifiers I have ever plugged into, and didn't instantly think that it could use a boost. It retains the bottom end pretty well, with a pretty usable taper on the gain pot. It starts with a nice AC/DC lowish-gain crunch around 2.5 and quickly starts to bring you into fire-breathing territory around 4.5. 4.5 to 6.5 is prime thrash territory. Past 6.5, it starts getting thicker and stops being too usable around 8. You can put a boost in front of it and make it even tighter, but it doesn't work well with all of them. A regular SD1 or TS9 works the best.
It is a little picky with pickups. My EMG 81x wasn't the greatest, but with my Duncan Custom, like what Holt used for a while, it just rips! Surprisingly, when I tried Holt's settings, he said in an interview, it tightened it up a good bit over my typical B:4, M:5-6, T:6.
Here's the quote: "Oh yeah, JCM 800 settings, let me see. Bass, around 7, mids around 3, treble around 5, presence around 4, my gain about 6(remember, my {censored} is modded, so they have tons of gain), and master goes to 11!"
I'll post the Google Drive link if anyone wants to check out the demos. Fair warning, though it's been a while since I picked up my guitar, and the playing is fairly sloppy.
The NAM demos are just an 800 power amp capture with the Mustaine V30 IR. The in room demos are going through my 5150 iconic's power amp with my '80s randall 4x12 loaded with Late 90s V30s and 2019 G12H30s in an X pattern.
https://drive.google.com/drive/u/0/folders/1pfFkWIXELL9FYHFZS8u6oW3XB1u8dx1X
This is a wicked circuit, as you can imagine. The only changes I've made are adding a tone stack switch to go from 270p/56k to 33k/470p, and a switch that changes the last voltage divider. I mainly just leave it in the normal position. Remarkably, for having 5 gain stages and no gate, it's dead quiet when I plug straight in. This is one of the first amplifiers I have ever plugged into, and didn't instantly think that it could use a boost. It retains the bottom end pretty well, with a pretty usable taper on the gain pot. It starts with a nice AC/DC lowish-gain crunch around 2.5 and quickly starts to bring you into fire-breathing territory around 4.5. 4.5 to 6.5 is prime thrash territory. Past 6.5, it starts getting thicker and stops being too usable around 8. You can put a boost in front of it and make it even tighter, but it doesn't work well with all of them. A regular SD1 or TS9 works the best.
It is a little picky with pickups. My EMG 81x wasn't the greatest, but with my Duncan Custom, like what Holt used for a while, it just rips! Surprisingly, when I tried Holt's settings, he said in an interview, it tightened it up a good bit over my typical B:4, M:5-6, T:6.
Here's the quote: "Oh yeah, JCM 800 settings, let me see. Bass, around 7, mids around 3, treble around 5, presence around 4, my gain about 6(remember, my {censored} is modded, so they have tons of gain), and master goes to 11!"
I'll post the Google Drive link if anyone wants to check out the demos. Fair warning, though it's been a while since I picked up my guitar, and the playing is fairly sloppy.
The NAM demos are just an 800 power amp capture with the Mustaine V30 IR. The in room demos are going through my 5150 iconic's power amp with my '80s randall 4x12 loaded with Late 90s V30s and 2019 G12H30s in an X pattern.
https://drive.google.com/drive/u/0/folders/1pfFkWIXELL9FYHFZS8u6oW3XB1u8dx1X
