Follow us on...
Follow us on Twitter Follow us on Facebook Watch us on YouTube
Register
Results 1 to 13 of 13
  1. #1
    Good Enough 5150rob's Avatar
    Join Date
    08.16.05
    Age
    44
    Location
    Ma
    Posts
    1,635
    Favorite VH Album

    Balance
    Favorite VH Song

    Aint Talkin Bout Love
    Last Online

    12.15.17 @ 02:18 PM
    Likes
    338
    Liked 461 Times in 200 Posts

    Default 5150 combo power scaling question

    Guys,

    quick question..... is it a fair statement to say that on the 5150 III combo amps that if you are playing at a low volume like say 2 or 3 the power scaling knob should also be set on 2 or 3? I am new to using this thing and was curious to keep the sound authentic when playing at low volumes (a la apartment setting) the power scale knob should be set on the same level as the volume of the channel your playing on? yes... no? please explain.

    Rob

  2. #2
    Good Enough
    Join Date
    02.06.02
    Age
    46
    Location
    Lincoln, NE
    Posts
    1,679
    Favorite VH Album

    1984
    Favorite VH Song

    the one Ed plays guitar on
    Last Online

    12.14.17 @ 03:08 PM
    Likes
    1,101
    Liked 784 Times in 422 Posts

    Default

    Granted, my only experience with power scaling is a push button on my Marshall TSL100 that drops the output from 100W to 25W, BUT...

    From my understanding, I really don't think this is absolutely necessary, Rob. I'm pretty sure what you are doing in the example above is simply playing your EVHIII at a volume level of "3" on what is effectively a lower wattage amp. As an example, "IF" the power scaling is on a linear scale (which I doubt it is), the "3" setting on the power scaling would in effect make it a 15W amp.

    Supposedly, the power scaling on the EVHIII does not affect tone, so you should be able to crank that volume knob up to your tonal preference, and then bring the db level back down to bedroom levels with the power scaling. Basically, you'd be using the power scaling knob as a built-in attenuator.

    Then again, I have yet to even SEE an EVHIII combo in person, so I'm not speaking from hands-on experience, either.

  3. #3
    Atomic Punk RRvh1's Avatar
    Join Date
    02.13.11
    Location
    Ontari-ari-ari-o!
    Posts
    16,407
    Favorite VH Album

    VH, 1984, 5150, F.U.C.K.
    Favorite VH Song

    A few of Daves, a few of Sams!
    Last Online

    12.15.17 @ 11:34 PM
    Likes
    6,135
    Liked 6,973 Times in 5,009 Posts


    Premium Member

    Default

    Great question and a great answer!
    That's pretty much how I understand it too, hubs. And like you, I'm just going from written and video knowledge. I've also never played a 5150III combo either.

    There are several other owners of that amp on this board though. Hope they can chime in with some first hand experience.
    "There's too many people on this basketball that's floating around the sun, who are too afraid to allow themselves to FEEL" - Edward Van Halen
    "Van Halen was never about the singer..." - a very wise fan.
    "Embrace the past. Live in the moment but keep your eyes on the future, and keep on moving forward..." - Richie Sambora

  4. The Following Member Likes This Post:


  5. #4
    Sinner's Swing!
    Join Date
    11.26.10
    Age
    46
    Posts
    3,353
    Last Online

    11.25.17 @ 09:06 AM
    Likes
    1,679
    Liked 1,374 Times in 803 Posts

    Default

    Very good answer. I don't have a 5150 III combo either, but I'm not a stranger to various attenuation, and some of the newer power scaling. I really like it!
    I have a custom made reactive load attenuation unit in my AC-30. It works great on it, but it will darken the tone slightly full up, but it's not power scaling, and I run some risks using it despite having a fan installed to cool things down. Also I get so much squaush with it, whereas with power scaling, your tone remains a lot more crisp, and just has more clarity and bite.
    It's supposed to really just be a much cleaner, more sophisticated method of reducing the volume without the degradation in sound quality found in typical attenuation methods, and the best part is not having to worry about frying tubes or transformers.
    It just doesn't happen because the amp runs differently within specs, and isn't being corked by some dummy load.

    There's no golden rule. With a well designed power scaling circuit, (which I know the III has) or even less complex built in power section attenuation/power tube pair splitting your basic amp functions should not dictate what the scaling should be. The scaling should just allow you to top out your power section nicely without blowing the roof off your place. At most you may notice a little more "squash" or "sponginess" (if any) with hot amp settings and the PS output set low, just a little tweaking should get you in the butter zone.
    Last edited by we die young; 01.07.16 at 03:35 PM.

  6. #5
    Good Enough 5150rob's Avatar
    Join Date
    08.16.05
    Age
    44
    Location
    Ma
    Posts
    1,635
    Favorite VH Album

    Balance
    Favorite VH Song

    Aint Talkin Bout Love
    Last Online

    12.15.17 @ 02:18 PM
    Likes
    338
    Liked 461 Times in 200 Posts

    Default

    thanks guys but I guess I am still confused..... What setting / level do I have the Power scaling knob on when I want the volume on low to keep the noise down but still have the nice EVH brown sound?

    guess I am still missing something here and not understanding how to use it. I guess I just have to play with it.

    Rob

  7. #6
    Sinner's Swing! evhintexas's Avatar
    Join Date
    11.12.11
    Age
    49
    Location
    Tx
    Posts
    3,039
    Favorite VH Album

    Fair Warning
    Favorite VH Song

    Push comes to shove
    Last Online

    12.09.17 @ 03:43 PM
    Likes
    1,425
    Liked 1,107 Times in 675 Posts


    Premium Member

    Donor

    Default

    I believe the higher the number the greater the output power. Opposite of an attenuator. I have a Peavey Vyper 75w which is that way. Only a guess though
    "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."

    A patriot must always be ready to defend his country against his government.

  8. #7
    Forum Frontman fudd's Avatar
    Join Date
    02.22.08
    Age
    38
    Location
    Earth
    Posts
    14,292
    Favorite VH Album

    Fair warning, 5150
    Favorite VH Song

    HAIL, love walks in, 5150
    Last Online

    @
    Likes
    1,319
    Liked 6,340 Times in 3,185 Posts


    Premium Member

    Donor

    Default

    Rob I keep my master at 3 and run the power level wide open. I get a real good tone. I could run it at 6 on the master and power level at 5 and it is a little hotter. It just takes some fucking around with.


    Sent from my iPhone using swagger

  9. #8
    Good Enough 5150rob's Avatar
    Join Date
    08.16.05
    Age
    44
    Location
    Ma
    Posts
    1,635
    Favorite VH Album

    Balance
    Favorite VH Song

    Aint Talkin Bout Love
    Last Online

    12.15.17 @ 02:18 PM
    Likes
    338
    Liked 461 Times in 200 Posts

    Default

    ok that kind of answers my question. In other words there really is no absolute "do this, do that" with it. You can have the volume at 2 or 3 and run the power knob half or all the way up depending on what you like to hear. I guess I was under the impression that the power knob had to basically be on the same level as your volume to get the right balance... good to know.

    got it I'll mess with it.

  10. #9
    Eruption AFU's Avatar
    Join Date
    06.20.00
    Location
    Rumford, R.I. USA
    Posts
    868
    Last Online

    12.15.17 @ 07:03 AM
    Likes
    208
    Liked 378 Times in 224 Posts

    Default

    Put the power scaling where it sounds best to you. For basement I go from oh, what's 1 watt, 7:00? All the way down. To 10-11:00 which is the best sound to me. 11:00 gets a nice chunky tube sound. I tried leaving it at 1 watt with a drummer. It was plenty loud enough. But a little thin. So next time I'll crank the power scaling all the way up. Think about what low watt amps sound like. Yes the tubes work hard. But usually they lose bass and headroom. I like bass. So I've pretty much stopped using the power scaling. It's all the way up. On the rare occasion I go downstairs late night I'll use it. And I'm about to record a bit so I'll use it for that. I was in love with it for a long time. It does change the sound for the better. Ah man. Now I want to try it again!

    So yes, put it where it sounds best to you.

  11. #10
    Sinner's Swing!
    Join Date
    11.26.10
    Age
    46
    Posts
    3,353
    Last Online

    11.25.17 @ 09:06 AM
    Likes
    1,679
    Liked 1,374 Times in 803 Posts

    Default

    Quote Originally Posted by 5150rob View Post
    ok that kind of answers my question. In other words there really is no absolute "do this, do that" with it. You can have the volume at 2 or 3 and run the power knob half or all the way up depending on what you like to hear. I guess I was under the impression that the power knob had to basically be on the same level as your volume to get the right balance... good to know.

    got it I'll mess with it.
    That's exactly right. Kind of think of everything else as a glorified preamp. Your power scaling is kind of a master master of sorts if you view it in that way. It allows the amp to breathe, and have more balls than just relying on the preamp section alone which is where the "buzziness" lies. The power scaling brings the power section into play giving that smoother, warmer, and organic characteristic we all love in an amp running up full, but just at a much lower volume.
    As far as the actual setting, it depends on multiple outside factors. Room size being a big one, as well as construction of the building.... disturbing other people for example. It's really up to you where you want to set it. There's no hard and fast rule.
    Like on my Vox...it's an older school design for attenuation, but I'm constantly dicking around with it. Sometimes just for a different kind of "feel" or tone....The blend of the pre and power tubes vary with different settings. Just find what you like.

  12. #11
    Sinner's Swing!
    Join Date
    11.26.10
    Age
    46
    Posts
    3,353
    Last Online

    11.25.17 @ 09:06 AM
    Likes
    1,679
    Liked 1,374 Times in 803 Posts

    Default

    Quote Originally Posted by we die young View Post
    That's exactly right. Kind of think of everything else as a glorified preamp. Your power scaling is kind of a master master of sorts if you view it in that way. It allows the amp to breathe, and have more balls than just relying on the preamp section alone which is where the "buzziness" lies. The power scaling brings the power section into play giving that smoother, warmer, and organic characteristic we all love in an amp running up full, but just at a much lower volume.
    As far as the actual setting, it depends on multiple outside factors. Room size being a big one, as well as construction of the building.... disturbing other people for example. It's really up to you where you want to set it. There's no hard and fast rule.
    Like on my Vox...it's an older school design for attenuation, but I'm constantly dicking around with it. Sometimes just for a different kind of "feel" or tone....The blend of the pre and power tubes vary with different settings. Just find what you like.
    Sorry...How I meant this was the power tube's character changes with the amp's master run high and your scaling controling the output level, and that's how it affects the pre and power tubes blended sound. It's more throaty.

  13. #12
    Good Enough 5150rob's Avatar
    Join Date
    08.16.05
    Age
    44
    Location
    Ma
    Posts
    1,635
    Favorite VH Album

    Balance
    Favorite VH Song

    Aint Talkin Bout Love
    Last Online

    12.15.17 @ 02:18 PM
    Likes
    338
    Liked 461 Times in 200 Posts

    Default

    awesome info guys..... I am going to try this tonight.

    thanks again,

    Rob

  14. #13
    Hot For Teacher joezlo's Avatar
    Join Date
    01.10.12
    Location
    Jersey
    Posts
    234
    Favorite VH Album

    WACF
    Favorite VH Song

    Romeo Delight
    Last Online

    11.02.17 @ 07:47 AM
    Likes
    55
    Liked 140 Times in 83 Posts

    Default

    Quote Originally Posted by 5150rob View Post
    thanks guys but I guess I am still confused..... What setting / level do I have the Power scaling knob on when I want the volume on low to keep the noise down but still have the nice EVH brown sound?

    guess I am still missing something here and not understanding how to use it. I guess I just have to play with it.

    Rob
    Rob,
    The point of the power scaling is so you can put your volume at your favorite loudness. Ex - my 100watt 5150 2's sweet spot at my setting was 4&1/2. I could never do that at 100Watts in an apt. But, if I could scale my amp to say 5 watts at my amp's sweet spot volume, it should maintain "total tonal excellence" at an overall lower volume.

    PS - in VH terms, Power Scaling = VARIAC!!!!!!

 

 

Similar Threads

  1. Power scaling and Ed's new combo.
    By AFU in forum Guitar Room
    Replies: 21
    Last Post: 09.04.13, 12:55 PM
  2. 5150 212 combo question
    By jabbo in forum Guitar Room
    Replies: 3
    Last Post: 06.09.08, 12:20 PM
  3. Question for 5150 Combo experts
    By ncbuckeye3 in forum Guitar Room
    Replies: 6
    Last Post: 03.30.08, 12:51 PM
  4. Question for 5150 combo owners
    By cam-5150 in forum Guitar Room
    Replies: 7
    Last Post: 10.05.06, 06:43 AM
  5. Marshall power brake / 5150 combo
    By Space Tape in forum Guitar Room
    Replies: 2
    Last Post: 07.31.02, 11:44 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •