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Thread: Malkoff M91

  1. #31
    Flashaholic* Kid9P's Avatar
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    Default Re: OK, who got an M91???

    Would love to see a beam shot vs the M61

  2. #32
    Flashaholic* Zeruel's Avatar
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    Default Re: OK, who got an M91???

    Me too, hopefully outdoors.

  3. #33

    Default Re: OK, who got an M91???

    I prefer it too, but I can't afford it at this moment. In my opinion, a bit expensive.

  4. #34
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    Default Re: OK, who got an M91???

    Merging threads...
    Resistance is futile...

  5. #35
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    Default Re: OK, who got an M91???

    Quote Originally Posted by Darvis View Post
    First of all... Man did I miss CPF, welcome back..

    That said, who scored a Malkoff M91??

    Got mine yesterday and all I have to say is WOW!!!! Loving the XM-L goodness.

    Running mine in an FM 2x18650 tube with a new Ronac Cryos head. Gets warm after a few minutes, but not too hot and what a HUGE hotspot. Loving it.

    Got one on order. These post just confirm what a smart purchase I made.

  6. #36
    Flashaholic* Zeruel's Avatar
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    Default Re: Malkoff M91

    Quote Originally Posted by hron61 View Post
    hi donn.
    im curious about the heat issue at say 1 hour runtime, as in is the light to hot to even hold or is it a useful light that is warm at best, and runtimes on 2x imr. will you post your findings here? thanks
    I'm curious to know too. Anyone has tried running at 1 hour yet?

  7. #37
    Administrator Kestrel's Avatar
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    Default Re: Malkoff M91

    Quote Originally Posted by LichtAn! View Post
    But come one a drop-in designed for 3 cells? So you're using a let's say 9P host and still get pretty low capacity. IIRC only 1.5-1.6A is given to the XM-L why not design it for a single cell?
    The finalized design of the M91 (w.r.t. voltage inputs) sounds perfect IMO. There are beginning to be scads of single-cell XM-L dropins available now, but very very few options for those who want to use multiple LiIons for longer runtime. 2 large LiIons is a fantastic combo. ~3 hrs or so of max output on 2x 18650's is a very difficult configuration to put together from components we currently have available on CPF. I for one am very happy that it can take relatively high input voltages.

  8. #38
    Flashaholic* srfreddy's Avatar
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    Default Re: Malkoff M91

    Many of the cheap XML's are low voltage, but the Thrunites have 2 cell models. However, the M91 offers higher output (2 amps vs. 1.5 for the Thrunite), and Malkoff durability. The downside is the cost, 125 vs 23 for the Thrunite.

  9. #39
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    Default Re: Malkoff M91

    I find it a bit curious that the Malkoff XM-L products have shot up this much in price compared to the XP-G products. The diodes aren't that much more expensive. I guess it's a bit of taking what you know you'll get for them..

    Either way $125 is too much, and I'll stick to the M61s, M60s and my potted Nailbender XM-L module. (apparently they're just $45 now :>)

  10. #40
    *Flashaholic* PoliceScannerMan's Avatar
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    Default Re: Malkoff M91

    I got my M91 yesterday, good golly Miss Molly the beam is awesome!! Makes me wonder what a monster a WildCat XML would be.

    HUGE flood, decent throw. Its almost like the M60 MCE with throw.
    In no order: HDS/Malkoff/OVEREADY/McGizmo/Sky Lumen -PSM

  11. #41
    Flashaholic* DimeRazorback's Avatar
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    Default Re: Malkoff M91

    Now we need beamshots!

    ^^Click for my beamshots!!^^ My Flashlights

  12. #42
    *Flashaholic* PoliceScannerMan's Avatar
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    Default Re: Malkoff M91

    Someone elses turn.
    In no order: HDS/Malkoff/OVEREADY/McGizmo/Sky Lumen -PSM

  13. #43
    Flashaholic* kyhunter1's Avatar
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    Default Re: Malkoff M91

    Overpriced, most likely yes. Malkoff reliability and customer service is worth it, if that is what you have to pay. $89.99 would have been a better price for it.

    Quote Originally Posted by jellydonut View Post
    I find it a bit curious that the Malkoff XM-L products have shot up this much in price compared to the XP-G products. The diodes aren't that much more expensive. I guess it's a bit of taking what you know you'll get for them..

    Either way $125 is too much, and I'll stick to the M61s, M60s and my potted Nailbender XM-L module. (apparently they're just $45 now :>)

    The new higher voltage driver specs look promising, and It is versatile because of compatibility with primaries. For sure more versatile than some of it's closest competitors like the famed Modoo V3 triple and others which are not compatible at all with primary cells. Like most all of Gene's products, brightness and runtime are probably under-rated with the M91's specs. If and when I pick up a M91, I will most likely use it in a 2x18500 set-up.

    Quote Originally Posted by Kestrel View Post
    The finalized design of the M91 (w.r.t. voltage inputs) sounds perfect IMO. There are beginning to be scads of single-cell XM-L dropins available now, but very very few options for those who want to use multiple LiIons for longer runtime. 2 large LiIons is a fantastic combo. ~3 hrs or so of max output on 2x 18650's is a very difficult configuration to put together from components we currently have available on CPF. I for one am very happy that it can take relatively high input voltages.

  14. #44
    Flashaholic* stoli67's Avatar
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    Default Re: Malkoff M91

    So I reread the specs.... seems that it only goes up to 9volts .... so 2 x 26650 it is then!

    Can't wait till a few with non-green tints come back in...

  15. #45
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    Default Re: Malkoff M91

    Waiting for mines to arrive. Good old PO, taking their time.
    Yes I have SAS... Surefire Acquisition Syndrome.
    The HA doesn't bother me but the darn blue tint does!

  16. #46
    Flashaholic* kyhunter1's Avatar
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    Default Re: Malkoff M91

    Taken from the Malkoff website: .....The input voltage is 6.5 - 12 volts.........

    Your setup will work nicely otherwise.



    Quote Originally Posted by stoli67 View Post
    So I reread the specs.... seems that it only goes up to 9volts .... so 2 x 26650 it is then!

    Can't wait till a few with non-green tints come back in...

  17. #47
    Administrator Kestrel's Avatar
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    Default Re: Malkoff M91

    Quote Originally Posted by stoli67 View Post
    So I reread the specs.... seems that it only goes up to 9volts
    From the Malkoff web page:
    "The input voltage is 6.5 - 12 volts. [...] The current draw is only 800ma at 9v and 600ma at 12v."
    Perhaps Gene can verify that it will operate within spec with 3 LiIons (voltage under load = 3x 3.7V = 11.1)

    Edit: kyhunter1, looks like you're the faster draw this morning.
    Last edited by Kestrel; 03-13-2011 at 08:59 AM.

  18. #48

    Default Re: Malkoff M91

    Quote Originally Posted by stoli67 View Post
    So I reread the specs.... seems that it only goes up to 9volts .... so 2 x 26650 it is then!

    Can't wait till a few with non-green tints come back in...
    How do you know it won't be green? Does Mr. Malkoff guaranty the tint?

  19. #49
    *Flashaholic* PoliceScannerMan's Avatar
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    Default Re: Malkoff M91

    My M91 is not green, at all. Cool white.
    In no order: HDS/Malkoff/OVEREADY/McGizmo/Sky Lumen -PSM

  20. #50

    Default Re: Malkoff M91

    Quote Originally Posted by PoliceScannerMan View Post
    My M91 is not green, at all. Cool white.
    I was just replying to stoli67's remark that he can't wait for some more non-green ones to come in. Does Mr Malkoff throw the green ones away? He must get stuck with some of them. Maybe that is part of the reason the price is so high?

    Does he still make the MD2 camo models? There's one for sale in the CMP that is gorgeous but I don't like the drop in that it comes with. A nice camo MD2 with an M91 and the dual mode ring and a couple of 18350's sounds really nice.
    Last edited by recDNA; 03-13-2011 at 10:53 AM.

  21. #51
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    Default Re: Malkoff M91

    i really like the malkoff quality and feel but the prize difference between the oveready triple and the m91 is to small i would rather have the oveready triple if you can find it there always out of stock sadly

  22. #52

    Default Re: Malkoff M91

    I had the Oveready triple and found I do not like pure flood. Because of its beam profile it didn't look as bright to me as I know it actually is. I'm not sure I wouldn't prefer the M91 to the Oveready triple. It all depends on the beam profile you like. I know now I do like a floody spill but I miss the hotspot when there isn't one.

  23. #53
    Flashaholic* Darvis's Avatar
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    Default Re: Malkoff M91

    Alrighty, for those interested, a little runtime test.

    I took two AW RCR123's off my PILA IBC at 4.2 volts, waited until they settled down to 4.15 and then fired up the M91 in the following rig:

    Moddoo (oveready) 1x18650 host with the P60 adaptor
    Moddo triad tailcap with a VANisleDSM FETtie switch
    Ronac's Cryos cooling head

    I tailstood the light during the entire test, there was NO perceptible change in brightness at all from start to finish.

    The light ran exactly 31 minutes and then shut off. I tested the batteries and they were at 3.33 volts.

    I let everything cool for 15 minutes, then fired it back up, it ran for about 30 seconds and shut back off (just to make sure I did not trip any heat cut-offs).

    The light was hot, not warm, hot; but not painfully hot.. I feel using it for this amount of time would have been no issue had I been holding it the whole time.

    31 minutes on RCR123's, that a lot of output and runtime for such a small light....!!!

    I had the light pointed at a white ceiling, the beam color is pure white in the hot spot with a noticable purple corona at the outskirts. This was the beam color throughout, so heat did not cause it to go blue. The purple is not noticable at all outside or when not pointing it at a white wall.

    I compared the brightness to other 500-ish lumen lights in my collection and it appears much brighter, so I suspect this thing is really closer to 650-700 lumens. It's MUCH brighter than the M61 and after this test, I am definitely NOT in the camp of the M61 is better; I think this is the most versitile light Malkoff has at the moment given the flexibilty of battery configuration and output.. it's stunning. If you are on the edge of whether to spend the 125 bucks or not, think about all of the possibilities with this light and then add the Malkoff reputation for quality, durability and customer service.

    My take: A 9P rig (2x18500) will be the most flexible, giving one the option of rechargables with good capacity and practical runtime, with the option of running three primaries as needed. The length of this combo would be no issue at all.

    EDIT: 30 minutes later, I checked battery voltage and they had both settled at 3.5 volts. I popped them into the PILA and they started charging with no issues, so this thing will not kill your RCR's. Nice!!
    Last edited by Darvis; 03-13-2011 at 05:43 PM.

  24. #54
    Flashaholic* stoli67's Avatar
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    Default Re: Malkoff M91

    I was offered one from a vendor with a greenish tint

    "Neutral with a bit of green in it." was his comment... 2T tint


    I want a cool white with no green so I am waiting.
    Last edited by stoli67; 03-13-2011 at 03:29 PM.

  25. #55
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    Default Re: Malkoff M91

    Quote Originally Posted by Darvis View Post
    I took two AW RCR123's off my PILA IBC at 4.2 volts, waited until they settled down to 3.7........
    Question, how long did you have to wait till they "settled down" to 3.7 volts? My RCR123's take about a month, or more to drop from 4.2-3.7 or so volts. Most Li-Ion cells hold their voltage quite well unless they are damaged, even those with protection circuits. Are you using a different chemistry, not Li-Co cells? Just wondering.

    Bill

  26. #56

    Default Re: Malkoff M91

    Just when I thought I had beaten my habit and stopped spending money on flashlights, the M91 comes along. I already feel myself getting sucked back in. When CPF was down, I went cold turkey and got along surprisingly well. But then I swung by here tonight and saw this.

    <sigh>

    optodoofus

  27. #57
    Flashaholic* Darvis's Avatar
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    Default Re: Malkoff M91

    Quote Originally Posted by Bullzeyebill View Post
    Question, how long did you have to wait till they "settled down" to 3.7 volts? My RCR123's take about a month, or more to drop from 4.2-3.7 or so volts. Most Li-Ion cells hold their voltage quite well unless they are damaged, even those with protection circuits. Are you using a different chemistry, not Li-Co cells? Just wondering.

    Bill
    Ha!, Thanks for catching that Bill.They were 4.15 volts after settling, I must have been thinking "3.7v Nominal" and typed that for some reason. I'll fix that up.

  28. #58
    Flashaholic* csshih's Avatar
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    Default Re: Malkoff M91

    Quote Originally Posted by recDNA View Post
    How do you know it won't be green? Does Mr. Malkoff guaranty the tint?
    the first batch had a bunch of varying tints.

    The second batch will only have 1D - a pure cool white tint (on the blackbody radiator line).

    -Craig

  29. #59
    Flashaholic* bigchelis's Avatar
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    Default Re: Malkoff M91

    From reading through the threads I think some find this M91 a bit too pricey considering alternative Oveready.com Tripples offer more lumens.

    I too thought the M91 was too much $$$$, but then I remembered my Malkoff M60, M61, ect.....all make the same OTF lumens regardless of voltage input.
    Most lights with multiple cell inputs drop in lumens and total watts with less voltage input, but the Malkoff drop-ins offer the the same lumens (minus M30 & M31) regardless of the voltage input. This is why I typically always test my lights with as many cell combinations and discover which cell/voltage input the lights or drop-ins like best.

    While the XM-L is a less expensive LED, the driver might be trully regulated which is probably justifiable price if it is.

    bigC
    Surefire 6P with Malkoff M60 simple, bright, efficient.

  30. #60

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    Quote Originally Posted by csshih View Post
    the first batch had a bunch of varying tints.

    The second batch will only have 1D - a pure cool white tint (on the blackbody radiator line).

    -Craig
    Thanks for the 411!

    Sent from my Droid using Tapatalk

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