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digital or analogue sub?

Discussion in 'Subwoofers' started by crackles, Sep 30, 2004.

  1. crackles

    crackles
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    Hi all,
    What is the difference between a digital and analogue amp found in active subs?
    Cheers
    Crackles
     
  2. BK Electronics

    BK Electronics
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    There are different levels of digital amps, some can accept a digital input then deal with the volume, frequency phase Etc. via a DSP core then feed straight into a digital amp without even using an analogue path. There are others that deal with the frequency, Phase, volume Etc in the analogue domain then feed into a digital amp and then there are the amps that are completely analogue.

    The advantages of a digital amp (Class D) is that it is highly effiecient and does not dissipate to much heat so the amp runs cool, does not need a heat sink.

    The advantage of an analogue amp is the sound quality, although class d amps have made great strides forward some people prefer the old system.
     
  3. crackles

    crackles
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    Marvvelous, thanks for that. I'm not to sure about all the technical stuff, but reading between the lines it looks like either way would be ok then?
    The BK XLS200 is analogue, so I guess thats why it has all those fins on the back then!
    Do you know what the 4 dials are for on the back of this (and other) subs?! Just to confuse novices like me, or is there a purpose?!
    Cheers!
    Crackles
     
  4. Ian J

    Ian J
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    As Mr Gleebles makes them I would hazard a guess that he does know what they are for. :D
     
  5. Xstyle

    Xstyle
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    Mr Geebles makes the BK sub, or amp... or just the knobs in general?

    Good question Crackles ... exactly what I would like to know...
     
  6. Ian J

    Ian J
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    Surely all subwoofers will come with an instruction leaflet telling you the purpose of each dial and socket so I wouldn't worry about such things in advance.
     
  7. BK Electronics

    BK Electronics
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    Hi There

    If you email me at tom@bkelec.com I will email back a PDF of the manual, please try email me before tonight as I am not at work next week

    Tom
     
  8. Pollywoggle

    Pollywoggle
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    Probably on tour with a giant snake :laugh:
     
  9. Xstyle

    Xstyle
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  10. Nic Rhodes

    Nic Rhodes
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    it is purely down to how you design your amp, personally I can see NO reason to stick with analogue amps when we are talking subs.m The decision is just a non brainer, in fact there are so many advantages to digital amps

    re sound quality, well I might be persuaded for full range amps but subs working over a tiny bandwidth, no way :lesson:
     
  11. Beobloke

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    The Beekeeper is quite right - digital amps do suffer from distortion at higher frequencies, but as the average sub amp doesn't do much at over 200Hz, the advantages of size, power consumption and efficiency far outweigh this.

    Adam.
     
  12. alexs2

    alexs2
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    This obviously is dependent on the design of the amp,switching frequencies and output filter design,with some of the newer offerings from e.g. Belcanto,and Tact being very good on that score,along with the TriPath Class T design.

    The point remains true however,that in terms of cheaper Class D designs for use in many subs,distortion will rise at high frequencies,but will not be an issue at the frequencies subs operate at.
     

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