Looking For New Amp??

Discussion in 'Marshall Amps' started by gary moore, Dec 3, 2017.

  1. gary moore

    gary moore Active Member

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    What 100w Marshalls have the option to drop down to 50w? I think thats what I need.
    Any suggestions would be appreciated.
    Thanks
     
  2. tschrama

    tschrama Well-Known Member

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    plug your speaker into impedance output rated twice as high .. output in halve.
     
  3. GuitarIV

    GuitarIV Well-Known Member

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    DSL, Jube or pull the outer or inner 2 tubes. Make sure to use the right impedance when doing so.
     
  4. gary moore

    gary moore Active Member

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    fry the transformer? I want an amp that I can change without mucking about with it?
     
  5. gary moore

    gary moore Active Member

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    I spoke to Marshall and was told it will damage the amp.
     
  6. crossroadsnyc

    crossroadsnyc Senior Moderator Staff Member

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    YJM100 / AFD100

    I could be wrong, but I think one of the amps from the TSL series has a half power option as well. Other than that, nothing is really coming to mind (which means there's another obvious choice i'm not thinking of at the moment).
     
  7. Gunner64

    Gunner64 Emotional Support Animal Gold Supporting Member

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    Dsl. 2555x, 2100 sl-x...
     
  8. chiliphil1

    chiliphil1 Well-Known Member

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    Just out of curiosity but, why do you need it? If it’s for volume reduction forget it, the difference isn’t noticeable. Marshall also has the things set where it uses triode rather than pentode for the reduction this, in my opinion alters the sound in a bad way.

    If you’re set on it though, the new DSL does it, the jubilee reissue, and I believe all 900’s. As the guys have said, you can pull a pair of tubes from any Marshall and reduce to 50. Also, as cross mentioned there’s the AFD and YJM which have the EPA control and that allows you to adjust the wattage infinitely from .01 to 100.
     
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  9. Gunner64

    Gunner64 Emotional Support Animal Gold Supporting Member

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    I'm not a fan of triode operation in guitar amps either. And as Phil said doesn't really drop the volume to levels that would justify it. The 2555x Jubilee reissue has the half power switch, and is a great amp. If your looking for volume reduction this amp sounds very good at lower volumes, and I find the half power switch is unneeded for getting a big tone at reduced volume. If you can find one to test drive it may be just what you're looking for.
     
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  10. ampeq

    ampeq Well-Known Member

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    The 1/2 power or even 1/4 power switch does very little to drop the sound. It does help it break up a little faster, but the amp still wants to be turned up a bit. What you really want is a "Amp Power Attenuator". It's like the ultimate master volume, you can run the amp at any setting you want to get that "oh so sweet sound" then set the sound level to mouse fart quiet if you like. They are around $200 for a good one. Check 'em out!
     
  11. johncart

    johncart Member

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    POWER BRAKE on anything?
     
  12. el_bastardo

    el_bastardo Well-Known Member

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    What you need is the JVM. I say that because I'm assuming that you want volume reduction. 100 vs 50 watts. half power vs full power, pentode vs triode, is no significant volume reduction, but the JVM probably has one of the best master volumes you'll find on any 100w amp anywhere.
     
  13. ampmadscientist

    ampmadscientist Well-Known Member

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    Pulling power tubes is a very poor way...( the worst method ever)
    Watts does not = loudness...
    Reducing the number of speakers is a better way...reducing the efficiency of the speaker is a better method.

    The most successful way: is to control loudness AT the speaker.

    It is better to use an 18 watt amp wide open....with 1 or 2 speakers...
    Then to use a 100 watt amp and struggle with reducing the loudness of a 4X12 cabinet.

    SEE the problem is: That you don't need a 100 watt amp...at all. You are just too obsessed with high power...that you will never need.

    MOST of you guys:
    Would sound waaaaaaaay better with an 18 watt amp. And just forget ALL the power reduction gimmicks.
    Play the amp wide open, and choose the RIGHT amp for the venue.
     
    Last edited: Dec 3, 2017
  14. ampmadscientist

    ampmadscientist Well-Known Member

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    Watts does not = loudness.
    And this is where your assumption causes problems. Don't expect 50 watts to be 1/2 as loud as 100 watts. Cause it will not be...

    What you will find is:
    50 watts (thru the same speaker) will be just as loud as 100 watts.

    It's the speakers, not the wattage that makes the amp loud.

    "...drop down to 50w? I think thats what I need...."

    You are basing this on an assumption...that is incorrect.
     
    Last edited: Dec 3, 2017
  15. el_bastardo

    el_bastardo Well-Known Member

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    Some of that is true, and some of that is pure nonsense. Your posts are like a broken record. You just repeat the same shit over and over and over no matter what the question is.

    Probably no one really needs a 100 watt amp. But they do have a sound and character, even when turned down a little, that is better for many people than a little amp cranked to within an inch of it's life. It's called headroom. It's a real thing, and it really matters.
     
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  16. johan.b

    johan.b Well-Known Member

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    Silver jubilee and 900 series has half power switch. Anyone calling himself a Tech should be able to implement it on pretty much any standard tube amp
    j
     
  17. tschrama

    tschrama Well-Known Member

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    No you wont fry your amp. The AC current consumption goes down, as does the plate dissipation. The plate voltage does go up a bit due to the higher reflected impedance by the output transformer, but that's no problem with EL34. Using EL34 at 26mA bias, power goes down to 55%. You might even try a lower bias.
     
    Last edited: Dec 4, 2017
  18. colchar

    colchar Well-Known Member

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    If you want 50 watts why not just buy a 50 watter?
     
  19. ibmorjamn

    ibmorjamn Well-Known Member

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    I would think if you are trying to have lower volume a kemper would be a better solution.
    I had a JMD 50w and it was quite good and versatile in any venue or room.
     
    Last edited: Dec 3, 2017
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  20. Jethro Rocker

    Jethro Rocker Well-Known Member Silver Supporting Member

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    What is it you want? You say a 100 watt amp w 50 watt switch.... because...?

    Channel switching? No?
    Jubilee is a nice amp. Also has a shared gain which can be a pain depending. I know, I have 2. 6100 series has 3 channels and full half and quarter power settings. What part do you really need? The ability to drop volume cause it won't do that much.
    TSL has VPR to approximate 25 watt setting. Maybe you find you need 50 watt with 25 watt setting.
    I dunno. More info?
     

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