
Smash
Hack
It is very fucking rig dependant. You are correct. I have had very different setups depending on which amp i had.There really isn't anything new in almost 20 years. There is the digital units. But the ones I tried I liked less than the analog.
Santiago at Marshall designed the Kerry King signature amp, the 2203KK JCM800 has been around since 2007. It only took a decade for people to start cloning the noise gate.
This noise gate was cloned in the Zuul, Cock Blocker, Phalanx, Endless Blockade, Tannhauser, Revv G8 etc....
"Marshall’s engineers developed a special noise gate circuit with a threshold control.
Most noise gates completely kill the sound once it drops below a certain threshold,” Bowcott says. “This noise gate has an ultrafast expander circuit that’s similar to what you’ll find in a studio-quality noise reduction unit. It will work extremely fast during tight, precise staccato rhythms, giving you those desired ‘holes of silence.’
When it comes to sustained notes, though, the expander gradually attenuates the signal by following the dynamics of the note, giving you a much more natural-sounding gating that won’t prematurely cut off the end of a note or chord that you want to ring.”
This is considered by many to be the best noise gate for guitar.
Personally I use a BOSS NS-2. It adds a bit of midrange. But the only time I use it is when using a OD / boost....and they all pretty much add midrange. I have a Zuul + also. It changes the sound less than the NS-2. But does change the sound like the rest.
You probably noticed there is individuals that love or hate all of them. All you can do is try them and see what works best for your application.
A lot of it is your rig and the way you play. There really is no perfect one solution that fits everything.
I highly recommend using the "key" method. If in the loop or out front. I pretty much do this 95% of the time when using a gate.
To further confound the situation, depending on your goals and how/what you play, a gate perfect for metal could be terrible for slow tempo rock chords