My seca amplifier

justshoemarkjustshoemark
in Amplifiers
Good evening all.
Colin bring the good man that he is dropped
Off the amp that he has been building for me.
I set it up tonight and is been on for 2 hours now. And is really starting to sing. Haven't had it up that Lound yet that will be tomorrow for abit I hope.
The bass really comes out and is deep. Very very good mid with a bright top. Makes it seem like the music is live a right in front of you very very real sounding. Very impressed and it's not worn in yet.
Very happy man :)

Comments

  • uglymusicuglymusic
    Welcome to the club Justin ;-)

    You'll have quite some time running it and if it's anything like mine, it'll get even better.
  • quickiequickie
    Nice one........enjoy :)
  • justshoemarkjustshoemark
    It's warming up nicely thanks Paul. :)
  • justshoemarkjustshoemark
    All I can say Is awesome :)
  • DocfosterDocfoster
    Another happy customer..
    :-)
  • AntiCrapAntiCrap
    To improve the sound of the SECA I have removing C4 makes it sweet with guts.


  • AntiCrapAntiCrap
    image
  • DocfosterDocfoster
    If i undertake this butchery, do i get a "mk2" or "SE" badge?
  • justshoemarkjustshoemark
    I may need help on this col.
  • AntiCrapAntiCrap
    "If i undertake this butchery, do i get a "mk2" or "SE" badge?" no a yellow duck.
  • uglymusicuglymusic
    Can this be done on Yin and Yang?
  • AntiCrapAntiCrap
    Dave your's is a completely different animal, the Greengoddes is different again in design but they are all SECA.
  • uglymusicuglymusic
    Yup. I thought that would be case, given the bloodline.
  • AntiCrapAntiCrap
    Sorry Dave, I am making some 100W mono soon, and they are differernt again. 100W 8R, 200W 4R, 400W 2R but not for the DIYer.
  • uglymusicuglymusic
    No worries at all Col. Was just checking.

    100W SECA?
  • AntiCrapAntiCrap
    Just a baby Dave , next year Jan time I might do a 1KW version for those buying a nuclear power station.
  • uglymusicuglymusic
    For those who want heating for a cathedral-sized space :-)
  • AntiCrapAntiCrap
    No I have put water cooling on them for hot tubs and swimming pools.
  • justshoemarkjustshoemark
    Colin 100w that sounds like a good idea.
  • DocfosterDocfoster
    I have no idea what a 100w SECA sounds like...

    But just to underline, a 20W SECA sounds neither anaemic nor feeble!
    :D
  • AntiCrapAntiCrap
    Alan Brown and Dave have heard the forerunner to the 100W.
  • uglymusicuglymusic
    I have. And SWMBO as well.

    It was almost unbelievably powerful, but wasn't a (proper) SECA, so it suffered by not having the low-level detail and nuance the SECAs have. 

    However, it didn't swallow the lecky like a SECA.
  • DocfosterDocfoster
    edited November 2015
    Colin, your description of the effects on sound of the removal of C4 (making the sound "sweet with guts") is tickling my fancy. If I understand correctly what you might mean by "sweet with guts", and as mentioned in my One4 audio amp build tread, "gut sweetness" was one of the few areas that I felt the TOCA had the slight edge over the One4. If the removal of C4 from the One4 brings it to a par in this regard then it will quite likely usurp its elderly forebear. It's bass is already superior, to my ears.
    I intend to give my One4 amp the snip over the next few days...

    (Oh, and what was the original purpose of the gut souring C4...?)
  • DocfosterDocfoster
    edited November 2015
    So all I need to do is cut out the bugger...?
    No reconnecting anything between the empty points...?
  • AntiCrapAntiCrap
    Cut it out and throw away, nothing more OR less hehe
  • DocfosterDocfoster
    Thanks Colin.
    All done.
    Initial listening in the 2nd system does seem more liquidy / silky / sweet. Next step is to get the One4 in the main system to recompare it to the Toca...
  • Osprey1000Osprey1000
    How would that removal technically affect the sound? 
    I am a complete novice but desperate to understand the principles that make a legendary amp designer. 
    It seems to be a combination of science, art and ear.
    I have the ear only. I appreciate his amps.
  • DocfosterDocfoster
    No idea Osprey. Like you, I have only ears.
  • AntiCrapAntiCrap
    It affects the response time of the constant current load thus making it much faster and there for more fine details, we are talking 250nS way past our so called hearing but we can hear it.
  • Osprey1000Osprey1000
    edited November 2015
    Can we hear these sounds because their interactions with each other outside the audible range create soundwaves that return back into the audible range? Just as in the natural world.
  • Osprey1000Osprey1000
    Isn't that why compression creates unnatural sound as they remove these so called inaudible frequencies? 
  • AntiCrapAntiCrap
    Yes, and the other is rise time on edges of fast tones like symbols and yuk piano
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