I’ve been waiting for a video demonstrating the various bright caps so thank you! Surprisingly I actually like the no cap tone.

Another great demonstration on how the bright cap works in these Marshall's. Pete Thorn made a great video on this topic as well. He demonstrated how he didn't care for the 680pf mod that John put in his Suhr but he likes using the 4700 pf or the 100 pf but nothing in between. It's pretty wild how non linear the range can be with the way the caps shelve off the highs working with the volumes. I like how you showed us a bunch of values spaced evenly across the range.

I’m surprised he stated jumping gives “more gain”. It doesn’t.  as most people should know it’s just a parallel connection of the bright and dark channel. And actually that reduces the input impedance the guitar sees and loads down your guitar output you should notice a drop in the resonant peak of the pickup.  You’re turning a 1 meg input impedance into about a 500k if I remember correctly. Test for yourself; jump channels turn the bass channel all the way down then plug and unplug the jumper.  Gain means amplification factor not distortion. Guitar players have been misusing that term from day 1. A microphone preamp is a high gain amplifier- makes a small signal into a very large one and without creating distortion. Elsewhere increasing gain can create more distortion depending how and where that’s done.

250pf and no more. Just the right amount of chime and no harshness. Everything above that, especially 500pf and 1000pf are just painful!!!!
I think that with a lot of gain there is so much compression going on that the brightness is tamed a bit (though I can definitely still hear it).

Thank you for a great demo! I just picked up a mint Carvin Legacy and a 1000pF bright cap on the overdrive channel volume pot took care of the overly dark voicing this amp can exhibit. Such a simple mod with huge scope for tone sculpting!

Great to see a comparison like this.
Over the years I’ve come to accept that for myself I need a different amplifier for each volume level or style of playing.
My amplifiers are all set up to my liking at 70% volume or higher.
I’ve never had good luck trying to get an amplifier to sound acceptable at both loud and low volume levels.

I like the 100pf. Works at low volume, no change at high volume.

Well done!  I think a higher value bright cap might sound better for an earlier, pre-1970, Super Lead when they were generally darker than the later years.

Man, great comparison.  Very helpful reference.

New marshall studio vintage came with 4700pf, it was too bright. I added a switch with a 100pf ,50pf and no cap. I play at low volumes so most of the time I play with no cap at all

i like the 1st one

Great Video!

Anything from 500pf to 1000pf either doesn't filter enough highs or lets in too few mids. Above 100pf you get some mids back which balance by softening the added treble pass thru

Great amp series!!!

great video; for me and based upon the sound that is coming out of my speakers, it's 250pF all the way....!!

i think that one of the lower values in conjunction with the presence control would get me anything i need.

I like dark sounds when distorted and bright sounds when playing clean, kind of what EJ does.

Awesome vid! I'm getting read to have a 3-way mini switch put on my SL for no cap, 100, and 4700. Thanks for sharing!

Nice sounds and info on the various caps..Great to get to hear those differences live..Ed..uk..😀

Upon first listen, I would be torn between the 250pf and 500pf and definitely jumpering the channels. Interested in seeing what the owner picks.