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1987X Bright switch off by default?

marshall2553

Experienced
Just wondering if the bright switch is supposed to default to off for the three 1987X models. All the other Plexi models have it on by default, but I suppose the particular amp modeled may have had the bright cap snipped.
 

FractalAudio

Administrator
Fractal Audio Systems
Moderator
Our reference amp has no bright cap. Looks like it was that way from the factory. There are no signs it was removed. The location in the circuit board is empty and the solder joints do not appear to have been disturbed.

Nothing preventing you from turning it on though. Lot easier than soldering one in.
 

marshall2553

Experienced
Our reference amp has no bright cap. Looks like it was that way from the factory. There are no signs it was removed. The location in the circuit board is empty and the solder joints do not appear to have been disturbed.

Nothing preventing you from turning it on though. Lot easier than soldering one in.
Thanks, I was just curious after noticing that it had much less gain than the others. Knowing Marshall, I guess that may or may not have been intentional. I've seen a few people on other forums say they removed their's so it sounds like at least some of them have it installed from the factory.
 

AdmiralB

Experienced
The versions without the effects loop, and some of the earlier ones with it, had the cap on the pot, not the PCB (although there was a spot, C5, for it). 4700pF, definitely supposed to be there (and makes the volume work like a switch).
 

FractalAudio

Administrator
Fractal Audio Systems
Moderator
The versions without the effects loop, and some of the earlier ones with it, had the cap on the pot, not the PCB (although there was a spot, C5, for it). 4700pF, definitely supposed to be there (and makes the volume work like a switch).
Our reference amp is a later effects loop version and there definitely never was a bright cap in it. I doubt the chassis was ever removed from the shell, still has the original tubes.
 

Stratoblaster

Fractal Fanatic
That is why I like the 1987X the best of all the Marshalls; the lack of a Bright Cap and circuitry tuned around not having one removes a lot of the "Marshall-shrill" right off the bat and makes it easier to dial in; you can get a lot more 'action' from the two channel volumes. It's a fat, full sounding Marshall and crunches nicely. Since it's a lower gain Marshall you can open up the preamp volumes to get them working and not have over-the-top distortion. Should be called Captain Crunch heh.
 

Daveis

Inspired
My custom JCM800 has no bright cap. And maybe one interstage coupling cap increased in value. No fizz but probably doesn’t cut live. Fractal rocks for allowing us to tweak the bright cap to taste.
 

Stratoblaster

Fractal Fanatic
My custom JCM800 has no bright cap. And maybe one interstage coupling cap increased in value. No fizz but probably doesn’t cut live. Fractal rocks for allowing us to tweak the bright cap to taste.
I have two JCM-800's and removed the bright cap and an interstage resistor/capacitor peaking network on both which brings the high end into a more manageable territory with plenty of presence/fizz/high end on tap if you need it.

And yes, much easier to mod amps on the Fractal...:cool:
 
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