Does running a Marshall designed for 110 V into a 120 volt outlet really make a difference?

Discussion in 'Marshall Amps' started by 1956tvmodel, Jan 23, 2021.

  1. 1956tvmodel

    1956tvmodel Active Member

    Joined:
    Jan 30, 2009
    Messages:
    128
    Likes Received:
    141
    Justy wondering if the difference of 10 volts make any difference on tone. I noticed on my Reissue JCM 800 2203x it is designed to run at 110 volts and my wall outlets are running at 120 and sometimes a couple volts over. Would that make any difference tone wise. I know they make the Brown Box which regulates voltage coming out of the wall. Just curious. Thanks
     
  2. ken361

    ken361 Well-Known Member

    Joined:
    Aug 30, 2009
    Messages:
    4,038
    Likes Received:
    4,000
    Location:
    detroit rock city
    I know the old amps were designed to run at 110v I say it should sound a bit smoother. I use a voltage regulator now from Apec.
     
    Dan Sing and Mitchell Pearrow like this.
  3. Old Punker

    Old Punker Well-Known Member

    Joined:
    Jun 17, 2020
    Messages:
    583
    Likes Received:
    1,405
    Location:
    Ontario, Canada
    From Wikipedia:

    "In the United States and Canada, national standards specify that the nominal voltage at the source should be 120 V and allow a range of 114 V to 126 V (RMS) (−5% to +5%). Historically 110 V, 115 V and 117 V have been used at different times and places in North America."

    In Britain, where your amp is made, their voltage is 230V, and they are aware what our voltage is and probably designed the amp to run at that voltage. Probably just copied over the nameplate rating (110 V) from the original without even thinking about it.
     
  4. Matthews Guitars

    Matthews Guitars Well-Known Member

    Joined:
    Aug 17, 2019
    Messages:
    3,112
    Likes Received:
    4,670
    All the voltages in the amp track with the line voltages. (Since there are no voltage regulators in the "classic" JMP models.) So the whole amp and all its voltages are running
    almost 10 percent over their optimal values. This is probably why many Marshalls have a reputation for blowing up during a gig.

    Get a variac and set the voltage to 110v and the amp is likely to have fewer problems and longer tube life.
     
  5. 1956tvmodel

    1956tvmodel Active Member

    Joined:
    Jan 30, 2009
    Messages:
    128
    Likes Received:
    141
    Thats what is kinda strange. So my 1985 JCM 800 2204 is labeled to run at 120 volts on the back and then my 2016 JCM 800 22.3x which is 36 years newer is made to run at 110 volts. Why would they just make newer amps to run at 120 which is standard.
     
    Old Punker and Mitchell Pearrow like this.
  6. trax1139

    trax1139 Well-Known Member

    Joined:
    Apr 1, 2011
    Messages:
    307
    Likes Received:
    770
  7. IOSEPHVS

    IOSEPHVS Well-Known Member

    Joined:
    Feb 10, 2020
    Messages:
    1,247
    Likes Received:
    1,507
    Location:
    Ohio
    Electricity in the US in notoriously dirty (plagued by ripples, spikes, and noise). A lot of EMF is wasted, but that's fine with your electric company because we pay for what we waste. Its amazing that appliances, especially those with electric motors or microchips, last as long as they do. 110, 117, 120? It really doesn't matter what it's called because unless you have installed corrective measures, it's not consistent anyway.
     
  8. Jethro Rocker

    Jethro Rocker Well-Known Member Silver Supporting Member

    Joined:
    Mar 11, 2011
    Messages:
    9,200
    Likes Received:
    12,511
    Location:
    Saskatoon, Canada
    I think @Old Punker has it there. They just converted from 230. Don't worry about it IMO.
    Plug n play.
     
  9. trax1139

    trax1139 Well-Known Member

    Joined:
    Apr 1, 2011
    Messages:
    307
    Likes Received:
    770
    Never blew up a Marshall (or any other for that matter) before, during or after a gig.
    Jethro Rocker has the winning entry today...Plug-n-Play!
     
    Old Punker and Jethro Rocker like this.
  10. Jethro Rocker

    Jethro Rocker Well-Known Member Silver Supporting Member

    Joined:
    Mar 11, 2011
    Messages:
    9,200
    Likes Received:
    12,511
    Location:
    Saskatoon, Canada
    Lost a tube in the TSL last song in a gig. Air guitared the last song. Otherwise lucked out. And yes, i bring a spare.
     
    Old Punker likes this.
  11. Chris-in-LA

    Chris-in-LA Well-Known Member

    Joined:
    Jul 19, 2018
    Messages:
    2,053
    Likes Received:
    1,816
    Location:
    Los Angeles
    It seems unlikely that Marshall is selling a new amp to US consumers that is designed to run at 110v.
     
    Old Punker likes this.
  12. dro

    dro Well-Known Member

    Joined:
    Aug 1, 2015
    Messages:
    961
    Likes Received:
    1,688
    Location:
    Blue Springs Mo
    When I started using a regulator (FURMAN) P 1800 AR. All my amps became dead quiet.
    First time I put it in line. I was doing a show at a memorial building in CA. Notorious for crappy power. When I first flipped the standby switch on my JTM 45. I thought I had forgotten to plug in the speaker cab. Instant panic. Oh shit, chasing wires at a gig sucks. Everything looked good. Tuned it back on. Raised the volume on my Lester and struck. Instant bliss. Put together a DISTO rig. From then on the whole rig was plugged into the regulator. Bought one for the studio and ran the whole place on it. Peace of mind.
     
  13. 1956tvmodel

    1956tvmodel Active Member

    Joined:
    Jan 30, 2009
    Messages:
    128
    Likes Received:
    141
    Wouldn't this be designed to run at 110v? This is a 2016 2203x reissue
     

    Attached Files:

    tce63 likes this.
  14. JP2036

    JP2036 Well-Known Member

    Joined:
    Aug 7, 2020
    Messages:
    300
    Likes Received:
    309
    No not really.
     
    tce63 likes this.
  15. 1956tvmodel

    1956tvmodel Active Member

    Joined:
    Jan 30, 2009
    Messages:
    128
    Likes Received:
    141
    Ok. Then all is good. Just was wondering. Thanks
     
    tce63 likes this.
  16. JP2036

    JP2036 Well-Known Member

    Joined:
    Aug 7, 2020
    Messages:
    300
    Likes Received:
    309
    It possiblly could have a small affect on the bias but if your amp was biased properly that affect is very minimal.
     
  17. Old Punker

    Old Punker Well-Known Member

    Joined:
    Jun 17, 2020
    Messages:
    583
    Likes Received:
    1,405
    Location:
    Ontario, Canada
    I have been using a regulator (power line conditioner) for many years. I agree with you, I too enjoy the peace of mind it brings.
     
    Dan Sing likes this.
  18. dro

    dro Well-Known Member

    Joined:
    Aug 1, 2015
    Messages:
    961
    Likes Received:
    1,688
    Location:
    Blue Springs Mo
    One day I'd like to try my Marshalls on Euro power. Maybe around 236 volt. I hear they are a different animal running big power.
     
  19. IOSEPHVS

    IOSEPHVS Well-Known Member

    Joined:
    Feb 10, 2020
    Messages:
    1,247
    Likes Received:
    1,507
    Location:
    Ohio
    It's quasi-semantics. If it's labeled 110~120V/60 Hz, it simply means that it was designed to operate in the US. Originally, the standard here was 110 V, then it was increased to 112 V, later to 115 V and then 117 V, until finally arriving at 120 V. The standard could change at anytime. Being standards, they don't necessarily equate to the potential available in your outlets. I just checked one of my outlets with a DMM and it read 117 V. Should I file a complaint? I consider myself to be lucky if I get somewhere between 110 and 120 V at all times.
     
    tce63 likes this.
  20. C-Grin

    C-Grin Well-Known Member

    Joined:
    Nov 8, 2020
    Messages:
    127
    Likes Received:
    306
    Location:
    edge of the Mt. Hood national forest
    I run mine at 120, 121, whatever it takes
     
    tce63 and IOSEPHVS like this.

Share This Page