Supfire M6 - resistor mod (Update testing XP-G2s on copper in post 59-60)

Racer, do u know how hot it got before the mod? Or how much hotter is it now?

Thanks for this bro! Good find/work!

nice write up, I’ve just received my m6 and I’m thinking the same as you, nw or hi cri xp-g2’s would be the way I’m thinking of doing things, yes there would be a lumen drop, but the throw increase would be interesting.

It would be the equivalent of adding an R040, if there were such a thing. So adding a R030 instead would result in even more current flowing to the emitters. That is, if the cells and other components can deliver it.

EDIT: Adding a R030 would be the same as adding 4 R120’s.

thanks! not too knowledgeable with the electronic parts of this hobby. should have divided the original resistance by three, instead i divided the r060 by two, which would be dividing by 4

For those of us that are new to the resistors and mods, online calculators can help out a lot.

Racer added three .12 resistors for a result the same as one 0.04

[quote=fishmaniac] Racer, do u know how hot it got before the mod? Or how much hotter is it now? Thanks for this bro! Good find/work! [/quote]

Texaspyro did some numbers.

The stock M6 is already hotter than a hot SRK ;) I increased output with more than 43% with the resistors I used. That adds a lot of extra heat to a light that is already hot on high. 0:)

[quote=gords1001] nice write up, I've just received my m6 and I'm thinking the same as you, nw or hi cri xp-g2's would be the way I'm thinking of doing things, yes there would be a lumen drop, but the throw increase would be interesting. [/quote]


I have some XP-G2 R5 3Cs, ill see if im happy with that combo, if not, ill just swap the emitters. It might take a week before I try it. Have to play with the stock XM-Ls a little first. :)

Might even swap the driver circuit one day too, ill see how the "off" feature grows on me. UI would be so much better if strobe and SOS were hidden. Its annoying to cycle through them in order to get to off, and its a bit annoying to wait for 3 seconds in order to turn the light off too. The normal SRK is much nicer in that way. No regrets buying the light though! :) Its nicely built. I always considered it a mod host, like all other lights I buy... 0:)

The advantage with this light compared to the kings are that I can more comfortably adjust high higher due to having a medium, which is now basically a high... :p I now consider high to be turbo.. J)

I know I have a stack of xm-l 4c emitters so I’ll likely fit them, cw is far too harsh these days and that’ll get me by till I can properly mod it, it is a good quality host that’s for sure. I just lock out when I want it off, quicker than a 3 sec button press lol

lol.. I did not think of that. Thanks, Ill try it out.. :)

Lol…nice one man! And with the super beefy contact point, I will not hesitate to try this.

its a dammed big twisty lol.

I just had a play with the m6 vs my convoy l2, whilst the l2 does feel heavier than the m6, I’m not sure I don’t still prefer the toilet plunger. They are though both completely different lights, big flood vs tight throw, both probably annoy my neighbours tbh, they’ll get used to it I guess, and cw really isn’t my thing, those emitters need swapping out stat lol

i can’t resist it,must wait until mine get here :smiley:

I’m still trying to get my mind around this.
So if I wanted the equivelant of 2 X .12 resisters, I would need 1 X .06 ?

impressive! i need to get someone to build me one or a srk like this

my hands are too fat and shaky to do resistor mods

A little off-topic, but I just got some “Wire Glue” from Ebay ( and\_trksid=p3984.m1439.l2649). The wire glue website says that you can use it to solder SMD devices.

Could it be used to do the resistor mods like this one?

Also, could it be used to solder stacked 7135s chips?

There’s also a “review” of sorts here:

i am thinking of starting to use a conductive epoxy to start attaching drivers to the pill

That’s what was done in that BLF thread I linked, but I’m wondering if it could be used for other commonly-done things, e.g., resistor modes and adding stacked chips. I think that it’d work but not sure about how well it works when things get hot.

You guys are crazy…
I am normally a fan of resistor mods but the m6 gets unholdable hot in too short.
So before I even would think of a higher power, I would definitely try to build a handle for this.

Shame on you ohaya. Wire glue, after you just bought that nice soldering station.
Actually I have some too, that I bought from the same place on eBay. I haven’t used it yet, but I don’t think I’ll try it on resistors or 7135 chips. I can’t be sure “how” electrically conductive that stuff is. I originally bought it for installing P60 drivers into pills, but after I got my station I never needed to bother with the “glue”.
Resistors look pretty easy compared to stacking chips.
I’m going to have to take a look at the driver of my FandyFire Warrier to see if it can be “resister modded”.

I already know that the handle from my Roche M170 will fit, and pretty sure the one from my EYE40 will too.

glad i’m still keep my M170 handle :bigsmile: