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speaker specs...

Discussion in 'Amps and Cabs [BG]' started by flamer, Jul 7, 2003.

  1. Jul 7, 2003 #1
    flamer

    flamer

    Oct 18, 2002
    swindon, england
    hi there,

    I've scoured the FAQ and done a search, but have been unable to locate what i'm looking for.

    I'm looking at new speakers (as always) and was wondering if anyone could point me in the right direction for an explanation as to what EXACTLY these specifications mean (see below), I have a clue, but i wouldn't really know if they were good or bad!

    · Frequency Response: (-3dB) 55 - 15k
    · Low Frequency: (-10dB) 48 Hz
    · Sensitivity: (1W/1M) 99 dB
    · MAX SPL 125 dB
    · X-over (horn high pass) 4,5 kHz

    apologies for what is probably quite a remedial question!
    many thanks,
    Phil.
     
  2. Jul 7, 2003 #2
    Joris

    Joris

    Jan 20, 2000
    Zevenbergen, The Netherlands
    Is that a raw speaker driver you're talking about?

    If so, there's no way to tell without the following additional specs:

    Fs (free air resonance freq)
    Qts (resonance peak width)
    Xmax (maximum linear displacement)
    Vas (equivalent air volume)

    If it's a CAB you're talking about:

    It's pretty obvious what the specs mean, I'm sorry to say so.

    Fequency response: the range of frequencies it can produce without serious loss of volume

    Low frequency: the lowest usable frequency. At -10 dB, it will sound half as loud as the rest, but would require 10x the amount of power to equalize.

    Sensitivity: it will produce 99 dB with 1 watt of input power, measured at a distance of 1 meter

    Maximum SPL: at max power, this will come out

    X-over: recommended frequency to cross over to a tweeter
     
  3. Jul 7, 2003 #3
    flamer

    flamer

    Oct 18, 2002
    swindon, england
    Hi, thanks for that, it is a 210 cab i'm talking about. I guess i know what they mean, It's more that i wouldn't know if they're any good or not.

    I.e. Is that frequency range good, should a usable low frequency be within a certain range?

    I understand the theory, i just have no idea of what constitutes a good frequency range etc!

    thanks,
    P.
     
  4. Jul 7, 2003 #4
    redneck2wild

    redneck2wild

    Nov 27, 2002
    Memphis, TN
    It depends what you are looking for in the frequency range. The E of a standard tuned 4 string bass is around 41Hz. The B of a standard tuned 5 string bass is around 30 Hz.
    If you need the fundamental frequencies of your bass then this cabinet may not be what you need but if you don't need deep bass then it may be.
    Many of the more popular Bass cabinets on the market don't produce these deep lows - and maybe they don't need to if you have good PA support.
     
  5. Jul 8, 2003 #5
    flamer

    flamer

    Oct 18, 2002
    swindon, england
    ah, i see, that makes things a little clearer, i feel stupid now as i know absolutely nothing about frequency ranges and how they work.

    so for example, if ashdown 210 stats read at
    60Hz - 20kHz that would be from low to high? And really you'd want something lower than 60hz to reproduce the B or D string with bottom end?

    am i on the right track here, or utterly wrong?!

    thanks, phil.
     
  6. Jul 8, 2003 #6
    Petebass

    Petebass

    Dec 22, 2002
    QLD Australia
    Yep you're on the right track now.

    FWIW, that cab loooks like it would make a good extension cab but I wouldn't use it as a stand-alone. Put a 15 under it to take the lows and it should kick (provided the amp can handle the new impedance of course)
     
  7. Jul 9, 2003 #7
    flamer

    flamer

    Oct 18, 2002
    swindon, england
    that's cool thanks for the advice, i do run that 210 with a 15" at the moment, it sounds good!

    Although I tried running the 210 solo with my ashdown abm500 last night and something really scary happened! I've posted a new topic asking about this!!

    by the way, what are these specs like for a 15" cab? i have GAS for a new and lighter one!

    Power handling: 300W cont. 600W prog.
    SPL: 96dB IW @ 1 mtr
    Impedance: 8 Ohms
    Frequency response: 41Hz 4kHz

    that's my last specs question, i promise!
     
  8. Jul 9, 2003 #8
    Petebass

    Petebass

    Dec 22, 2002
    QLD Australia
    There's not much to go with here but it looks OK without being spectacular. Would handle a 4 string better than a 5 though.
     
  9. Jul 9, 2003 #9
    flamer

    flamer

    Oct 18, 2002
    swindon, england
    that's cool,

    I only ever use a 4 string anyways!
    Sorry to be a pain, but does anyone have an example of good specs for 210 and 15 speakers?, I want to make sure i buy the right cab!
     
  10. Jul 9, 2003 #10
    Joris

    Joris

    Jan 20, 2000
    Zevenbergen, The Netherlands
    What exactly is that cab you have on your mind? Because specs say very little about the qualities of the cab. Maybe people here have experience with that particular cab, and those experiences are worth much more than a list of specs.
     
  11. Jul 9, 2003 #11
    Petebass

    Petebass

    Dec 22, 2002
    QLD Australia
    What Joris said!

    That's kinda what I meant by "not much to go on here". 2 cabs with very similar specs can sound very different in the real world.