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why all the clipping?

Discussion in 'Amps and Cabs [BG]' started by beachgeddy, Dec 1, 2001.


  1. beachgeddy

    beachgeddy

    Jul 11, 2001
    Muskegon, MI
    My rig is significantly insufficient. I need to know about this as I am about to go out and buy more rig.
    My amp clips anywhere above 11 o'clock on the pre gain. The amp is 330 watts, 4 ohms. Cab is 4x10, 350 RMS 4ohms. Bass is active. I play a lot on the low B, which is tuned at Ab. So I use a lot of low frequency which my cab cant handle but thats beside the point. And there is two really loud guitar players to keep up with.

    So, right now I sound like crap. One problem is my cab not handling the lows. But, why does the amp clip so readily in this set-up? Too much low? Not enough power? If I had a better cab(s), would the amp react differently? All of the above?

    If possible, I want to use my 330 watt head and just get a different 410, such as the Eden XLT or Ampeg HLF. Is this advisable, or do I really need more power because of the lower tuning? :confused:
     
  2. leper

    leper

    Jun 21, 2001
    well, the pre gain is really just to adjust for how hot the signal from the bass is, so thats not a real issue.

    if youre playin that low with two loud guitarists youre gonna need at least 6 to 7 hundred watts, and 6 or more 10's.
     
  3. CrawlingEye

    CrawlingEye Member

    Mar 20, 2001
    Easton, Pennsylvania
    :confused: Why would you turn your pregain up that high? :confused:


    I hope you're not confusing pregain with postgain. :eek:


    That would cause tons of clipping...
    I'll add a bit on to what was said before...

    Pregain's pretty much like the volume of your input, postgain's the volume of your output.
    Think of your pregain as adjusting the volume of the signal sent to your poweramp, from your preamp. (which it essentially is)
    Think of your postgain (or volume) as adjusting the volume of the signal being sent to your speakers, from your power amp.

    All in all, your pregain being at 11 has got to go. I don't suggest setting your pregain above 7, let alone that high...

    It seems to me that you need an 18 or 15 to be added to your setup also, for the lows.
    I'm not familiar with your 4x10 (you didn't mention what it was), but most 4x10's can't handle that low of notes. A bag end 1x18 would help you out quite a bit. :)

    I'm sure the gurus like Joris, Bgavin, or Spacegoat will answer this with more details, more efficiently. :)
     
  4. Richard Lindsey

    Richard Lindsey

    Mar 25, 2000
    Metro NYC
    IMO you need considerably more power, and a cab that can handle the added watts.
     
  5. leper

    leper

    Jun 21, 2001
    but if the input is voiced for passive pickups and hets got 24V elevtronics with the bass eq dimed then hes gonna need to set the gain lower. If i plug into the passive input on my sm400s with my modulus with 18v emgs with eq flat i set the gain at about 9 oclock...

    in anycase, input gain should be set so you dont clip, end o story (unless thats the sound youre lookin for of course).
     
  6. JMX

    JMX Vorsprung durch Technik

    Sep 4, 2000
    Cologne, Germany
    Leper is right.

    If the preamp clips @ 11 o'clock, you need to set if lower. End of story.

    Using other people's setting is totally pointless.

    RTFM!
     
  7. Clipping in either the pre or main amp is not a good thing. Turn down until it stops. If you're clipping the power amp and you're not loud enough, EQing the low freqs down a bit gives you some headroom to turn up the volume. Not enough? Push the mids up to get a sound that cuts.

    Like the Acme bash thread, it all comes back to lower frequencies need more power. The lower the freqs (in your case very low) you want to reproduce accurately at high volume, the more power you need no matter which cab you use.
     
  8. leper

    leper

    Jun 21, 2001
    just read the book-minute-thing joe...and dear lord is it funny :D :D :D :D

    especially great expectations...thats pretty much what i got out of it :D
     
  9. <center>ALL</center>
    You rule, Beowulf.
    :D:D:D
     
  10. captainpabst

    captainpabst

    Mar 18, 2001
    Tennessee
    i think possibly a couple people misinterpreted what beachgeddy said about his gain setting - he said 11 o'clock - that's less than halfway up, unlike a setting of 11 on a marshall which would be all the way up. 11 o'clock translates to about '4' or so if the lowest setting is 1 (about 7 o'clock). am i right beachg?

    if so, the gain set on 4 shouldn't be a problem - i'd say the problem is the amp running out of headroom from trying to produce an A flat loudly. (what's the volume set on? also are you boosting your low frequency control?)

    first off i would say you need more power, and an efficient cab would help, or simply the addition of another cab. but tell us what you're using now and we'll go from there...
     
  11. At higher volumes, certain EQ settings can effect the cliping. Higher wattage can correct this, but different settings can as well. What kind of rig is it?
    Also, my 410 cabinet cuts through mesa boogies and marshalls just fine but it might be because it's an SWR. Still, I don't find the need to crank it or anything.
     
  12. CrawlingEye

    CrawlingEye Member

    Mar 20, 2001
    Easton, Pennsylvania

    His profile states that he's using an Eden Time Traveler head.
    I also think there was no misinterpretation, in the other thread he stated that he turns his volume "up to 5." Which would imply that he's using more of his pregain than volume, and has them backwards.

    I think he needs to seriously rethink and learn what his EQ settings are, and how to utilize his EQ.
     
  13. embellisher

    embellisher Holy Ghost filled Bass Player Staff Member Supporting Member

    I think that he means eleven o'clock.
     
  14. beachgeddy

    beachgeddy

    Jul 11, 2001
    Muskegon, MI
    I meant just below half way on the pre gain . . . and besides the other night I plugged into the PA direct from the amp and then I could turn it up past that with no clipping, so I need more power. I lost my At&t internet so I wont be back for a while.