The Hughes & Kettner User Forum

The Unofficial guitar amp and cabinets forum for users of Hughes and Kettner products. We are not affiliated with Hughes and Kettner!!


    40W vs 20W - tone difference?

    Share
    avatar
    proddy

    Posts : 7
    Join date : 2017-09-24
    Location : The Netherlands

    40W vs 20W - tone difference?

    Post by proddy on Sun Sep 24, 2017 8:11 am

    Hi all, I'm new to H&K and delighted so far with my GM40 and 212 H&K V30 Cab.

    I have a question about the Power Soak. Tone-wise will there be a huge difference running at the full 40W using a lower Master volume (25%) say versus switching to 20W with the Master a little higher at around 50%?

    I know the pros & cons at running 20W (saving tube life, but more heat etc) but not sure what the trade offs are in terms of overall tone & sound. I haven't been able to try this out myself at volume yet so just throwing it out there....

    avatar
    proddy

    Posts : 7
    Join date : 2017-09-24
    Location : The Netherlands

    Re: 40W vs 20W - tone difference?

    Post by proddy on Sun Sep 24, 2017 8:46 am

    Right, probably should have looked at other posts in the forum before posting this. There's a great deal of live comparisons done with the GM36 (see http://handkusers.forumotion.com/t155-master-volume-settings). I think the sweet spot is to keep the Master around 12-noon if possible for crunch/leads so I'll be trying this at 20W. And also going from 40->20 W doesn't use the Power Soak, just switches off 2 of the 4 power amp tubes which makes sense.
    avatar
    JonnyNonsense

    Posts : 66
    Join date : 2017-06-19

    Re: 40W vs 20W - tone difference?

    Post by JonnyNonsense on Sun Sep 24, 2017 5:08 pm

    To my ears, remarkably, the GM40 doesn't really have a 'sweet spot'. It sounds better loud than it does at bedroom volume, but the tone is generally very consistent.

    Personally I just run the clean sounds at 40w and the distorted sounds at 20w, that seems to work perfectly.
    avatar
    bordonbert

    Posts : 985
    Join date : 2015-01-28
    Age : 98
    Location : Southern England

    Re: 40W vs 20W - tone difference?

    Post by bordonbert on Wed Sep 27, 2017 8:07 am

    I can't comment on GM40 tone I'm afraid but on a technical note the additional heat question with the power soak is a bit of a non-issue. You're right, it doesn't make any difference from 40W->20W where one output pair is removed, but even from 20W->5W->1W where the resistors are switched in you are only dissipating a maximum of around 19W extra and it's even less than that in real life terms as the guitar signal is so transient, that means it's just not like a steady state sine wave signal at all. If you average out the gaps in the signal and your playing they drop the actual dissipated heat down much lower. It really doesn't make that much difference to an amp in a well designed metal enclosure which conducts heat out as well as convects it as the H&K models do.

    Sponsored content

    Re: 40W vs 20W - tone difference?

    Post by Sponsored content


      Current date/time is Mon Jul 16, 2018 10:18 pm