Does the gain need to change when you buy new subs?

Discussion in 'OT Technology' started by CodsterTX, Mar 30, 2006.

  1. CodsterTX

    CodsterTX OT Supporter

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    A Professional set the gain when he installed my old system. Ive, upgraded my subs, and was wondering if i could raise the gain? Or, did the professional already set it for my headunit?
     
  2. pharcyde183

    pharcyde183 Nissan by nature

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    It depends on how he set it. If he set it by ear (which unfortunately most professionals do) then you will probably want to mess with it.

    If he set it using math and voltages and shit or a DIMM (which isn't that good anyway) then best to leave it alone
     
  3. CodsterTX

    CodsterTX OT Supporter

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    Ok, what is the best way to set it? I tryed turning my volume up to 3/4 and then raising it until it disorts.

    1 - It's too loud at 3/4 and im scared to mess with it, because i might blow them.

    2 - I dont really know what distortion sounds like. Is it when the bass raises significantly, or does it start making staticy sounds or something?
     
  4. bearsdidit

    bearsdidit OT Supporter

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    gain should be adjusted if your souce changes, not the sub.
     
  5. darkslayer

    darkslayer There is more to life than increasing its speed.

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    That depends on the output handling of the sub and the rms output of the amp. If the new sub doesnt have as much power handling capabilities you may need to turn the gain down a bit to avoid over powering the new sub.
     
  6. CodsterTX

    CodsterTX OT Supporter

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    my old subs were 130rms (260w peak). My new subs are 330RMS (1200w peak).
     
  7. bearsdidit

    bearsdidit OT Supporter

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    :eek3: The gain knob is not a volume control.
     
  8. JRock10

    JRock10 Active Member

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    nobody does this
     
  9. JRock10

    JRock10 Active Member

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    think RONCO.....set it and forget it!
     
  10. bearsdidit

    bearsdidit OT Supporter

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    lol only classy places do that ;)... we should be getting an o scope soon
     
  11. GSteg

    GSteg Member

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    Well technically it is :big grin:


    We just dont promote to use it as one:nono:
     
  12. bearsdidit

    bearsdidit OT Supporter

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    :noes: hehehe
     
  13. CodsterTX

    CodsterTX OT Supporter

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    so i guess i do need to raise it. But can someone tell me how to tell when its to high. And what distortion sounds like.
     
  14. GSteg

    GSteg Member

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    Distortion sounds like wet fart.

    Well sometimes it does. Sometimes the speaker will make a static-type of sound, or the vocals become unclear (though it can be characteristic of a speaker at higher volumes). It's not that hard to tell that a speaker is making weird noises. You'll probably figure it out on your own. It'll sound.....distorted :hs:
     
  15. ngsm13

    ngsm13 New Member

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    Actually, EVERYONE should do this...

    Set your gains with a Test Tone CD, and measure AC voltage on the outputs of the amplifier with a DMM. Even better, use an O-Scope to test for clipping.
     
  16. JRock10

    JRock10 Active Member

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    should being the key word. actually, if we did multiple amps/subs (read 2/4 or more) then the shop manager would assist in setting gains, but he was tone deaf. he could read the hell out of a meter though!
     
  17. twistid

    twistid Banged By Super Models Moderator

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    i have one at work. :naughty:
     
  18. JRock10

    JRock10 Active Member

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    do you use it when you pop an amp in to push a couple of subs for someone that wants bass, or do you just give it the old "ear test"
     
  19. twistid

    twistid Banged By Super Models Moderator

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    i also have a sg165 am-fm stereo analyzer(for use with an oscilloscope)... but the majority of the time i pop in thomas dolby - hot sauce, and give it the ole listen. :o
     
  20. ngsm13

    ngsm13 New Member

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    I carry an 0 dB test-tone CD with me. Simply to turn the HU up to the highest listenable volume,press play on the HU with repeat on selected track, and grab my DMM to set it to the AC voltage I want... takes like... 3 minutes tops?
     

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