Belated NPAD: Kartakou Beastbox preamp

Discussion in 'Gear & Equipment' started by Gmork, Aug 24, 2020.

  1. Gmork

    Gmork SS.org Regular

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    The kartakou beastbox preamp pedal. Runs two 12ax7 tubes at high voltage (300v).
    Have owned it for about 2 or 3 months now.

    used it into my mesa 50/50 poweramp, in my powerstage170 and into my 6505+ fx loop.

    Quick cons: 3xpensive! And physically huge! runs at 12v 800mA and uses a high powered 12v adaptor, need to figure out how to run it off my cioks dc10 or voodoo mondo.

    Its based on the engl e530 (which i own) , its defiantly close but the e530 sounds a bit darker and more buttery smooth and has the dual low mids and high mids controls while the bestbox has just a single mid control. Mind you the beastbox is essentially only inspired by and not an exact clone of the engl so hard to ding it for not being exact.

    Pros: its a total beast. I only had the mesa and poewerstage at lower home volumes whuch sounds territic!
    Also used it boosted through the 6505+ loop at band practice and it was honestly pretty crazy. Super huge, aggressive and brutal. Liked it more than the amp for those types of tones.
    Has cool buillt i loops that i havent experimented with yet similar to the tightmetal.
    Love the mini toggles for deep and dark. Can get pretty diverse tones. Fat lows and thick tone or razor sharp etc.

    I cant see myself ever getting rid of it. Definitely recommend it if youve got $$ to burn.
    So many great options for preamp pedals these days!
     
  2. maggotspawn

    maggotspawn SS.org Regular

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    Congrats, he make's some cool stuff. I love my Collosus preamp.
     
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  3. HeHasTheJazzHands

    HeHasTheJazzHands SS.org Regular

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    Didn't you used to have an Engl E530? How does it compare?
     
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  4. Gmork

    Gmork SS.org Regular

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    Lol read the original post!
     
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  5. diagrammatiks

    diagrammatiks SS.org Regular

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    you definitely need 12v but if it only has 2 12ax7s you might not need 800ma.
     
  6. Gmork

    Gmork SS.org Regular

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    Just going by what kartakou told me. I suppose the worse that will happen if i try less mA is that it just wont power on eh?
     
  7. HeHasTheJazzHands

    HeHasTheJazzHands SS.org Regular

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    Huh. Dunno how I missed it. Guess I may pass on getting one then. I loved the e530 because of how fucking rude it can be and the dual mid ranges
     
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  8. Gmork

    Gmork SS.org Regular

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    I see the beastbox as more "rude" bit brighter, bit more harsh (not in a bad way) while the engl sounds more smooth.
    Someday ill have to do a comparison video, though my e530 is up for sale locally so i guess i should get on that.
     
  9. HeHasTheJazzHands

    HeHasTheJazzHands SS.org Regular

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    Goddammit I misread you AGAIN. :LOL: hurricane prep got my mind scrambled. Nevermind I want the beastbox agqin
     
  10. Gmork

    Gmork SS.org Regular

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    Hurricane!? Well stay safe pal.
     
  11. sonoftheoldnorth

    sonoftheoldnorth SS.org Regular

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    Me too.... One of these days I will do some vids and a review... I did actually promise Vasili
     
  12. Gmork

    Gmork SS.org Regular

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    Really awesome customer service too.
     
  13. diagrammatiks

    diagrammatiks SS.org Regular

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    Well it depends on if the pedal is really all tube or not...like are tubes the only things drawing power.

    something like the mesa whatever it's called or the backstar thingy has a lot of solid state stages and op amps. That'll draw significantly more power.

    If it's really all tube running at 12v heaters then it only needs 150ma per tube plus plate current which isn't that much. so like 400ma.

    worst case it doesn't turn on or sounds like crap. don't use it for too long like that it will ruin your tubes.
     
  14. HeHasTheJazzHands

    HeHasTheJazzHands SS.org Regular

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    Laura's about to pound Louisiana and Texas. :ugh:

    Besides that, But yeah, def gonna have to check this out. Always wanted an Engl E530.
     
  15. Emperoff

    Emperoff Hasta la vista, Baby Contributor

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    Congrats! The Beastbox is definetely on my shopping list. I'd be selling my AMT SS preamps to fund it since I want to try something different. Size is likely due to through hole construction instead of SMC like other brands. Now that I mention this, can I have guts pics, please? :D

    I had a handmade Soldano GTO clone which had zero SS stuff and required a 2A power supply (label said 2,5A but manufacturer told me 2A was fine) so I guess it's not that rare.
     
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  16. diagrammatiks

    diagrammatiks SS.org Regular

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    There's not going to be a situation where more amps is bad...but I can't imagine a circuit where you would need 2a to power 2 12ax7s.

    The mesa is 3 tubes and uses a 1a power supply.

    @Gmork

    Actually you know what forget what I said. I remember how this is done wrong.

    That's a 12vac supply right? The 12vac gets put into a transformer to get the 300vdc plate voltage.
    The 12vac is directly rectified to provide the heaters. You probably need 800ma at that point.
     
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  17. Gmork

    Gmork SS.org Regular

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    Well im selling my e530 like new for $500 canadian. Its a 230v European version but i bought a brand new pyle voltage converter which worked like a charm which im throwing it on the deal.

    Im paranoid about dealing with total strangers online so never posted it anywhere other than locally. If youre interested and willing to cover all shipping costs than id be down.
    Ill see what i can di about the guts
     
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  18. Emperoff

    Emperoff Hasta la vista, Baby Contributor

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    Yay! No gut pics anywhere on the net so I'm super curious! :donnie:
     
  19. Gmork

    Gmork SS.org Regular

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    Ok so, bad news. Obce the back cover comes off youre met with the circuit board but its secured in there some how (not screws) so unfortunately for you im not willing to pry it off and potentially wreck it, too dang expensive to be F'n around with it lol. Maybe this is why you dont see any gut shots around. Sorry i tried kbb9.png
     
  20. Emperoff

    Emperoff Hasta la vista, Baby Contributor

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    Well, it's something. I'm really surprised it uses SMC considering its size. It's probably secured by the actual knobs, so yeah don't force it! To take that board off you would need to remove all knobs and washers, which I don't expect you to do, obviously.
    But thanks anyway for opening it for me! :cheers:
     
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