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    Thread: Why do we need a DSP ?

    1. #1
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      Why do we need a DSP ?

      Hi All,

      It would be great to have a discussion about Car Audio DSP . We knew its for retaining the OEM and improvising the After market HU with Active capabilities. however some detailed discussions will help the Audio Enthusiast to understand its capabilities. we have some Informative sticky Thread like T/S Parameters Simplified with summarized info of TS Parameter
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    2. #2

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      DSP as you would be aware is Digital Signal/Sound Processor. It is used for Active setups and sits between the source and amplifier.

      To answer your question directly - it is based on budget and your music requirement. If Hi-Fi (High Fidelity) is your need for your car audio then you need to have a DSP. It betters the SQ beyond imagination. But that does not mean that only by adding a DSP, you will the best output. You need to complement it with necessary equipment as well.

      For a quick understanding, I had an all Focal passive setup in my car and earlier this year I upgraded to an active front stage one by adding a DSP and re-positioning the speakers. It did improve my SQ to a far grater level, but was it was only after I upgraded my Focal amp to Pio 944 I could really extract the best from the DSP. In other words the SQ of your setup is based on the weakest equipment in the chain.
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    3. #3
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      Does adding a DSP to a simple setup make any significant difference? I have front components and a sub powered by a 4ch amp. The HU is a Pioneer z2090BT. I usually listen to Prime Music, FLAC and CD's in that order.

      thanks!

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      rahulsharma_7's Avatar
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      Unless you plan to go fully active, adding a DSP wont really benefit the setup. Yes some use it for doing EQ in a passive system, but again this is very limited due to crossovers in place.

      If one plans to go for an Active setup, adding a DSP should be primary unless one is using a HU which has a good tuning capabilities for active systems.

      How does a DSP help ? - Well in many ways, one get a plethora of tuning capabilities with it - be it choosing which frequency to use a particular driver, to defining slopes/octaves, equalization capabilities, time alignment capabilities - all these vary from DSP to DSP across manufacturers based on a given price point - the quality of internals and features would drive an expensive DSP over a much lesser costing one.

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      Quote Originally Posted by rahulsharma_7 View Post
      How does a DSP help ?
      I believe the Factory head unit out has the weakest signal or not the best output for Producing SQ. In that case Does the DSP enrich the audio signal ?
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      Quote Originally Posted by balaji.jkb View Post
      I believe the Factory head unit out has the weakest signal or not the best output for Producing SQ. In that case Does the DSP enrich the audio signal ?
      I think for that there is line output convertor available.

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    7. #7

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      Quote Originally Posted by rahulsharma_7 View Post
      Unless you plan to go fully active, adding a DSP wont really benefit the setup. Yes some use it for doing EQ in a passive system, but again this is very limited due to crossovers in place.
      DSP is for fully active front stage setup only. There is no point in going passive with DSP.

      Quote Originally Posted by rahulsharma_7 View Post
      I think for that there is line output convertor available.
      It does not work good wrt SQ as it has its own set of perils
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    8. #8
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      Quote Originally Posted by rahulsharma_7 View Post
      Unless you plan to go fully active, adding a DSP wont really benefit the setup. Yes some use it for doing EQ in a passive system, but again this is very limited due to crossovers in place.
      Quote Originally Posted by livelyyoungman View Post
      DSP is for fully active front stage setup only. There is no point in going passive with DSP.
      Not at all true! You must try a DSP on a passive setup too and see how big of a difference it makes. DSP is useless in any setup, specially if you don't use an RTA.
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      Quote Originally Posted by mclaren1885 View Post
      Not at all true! You must try a DSP on a passive setup too and see how big of a difference it makes. DSP is useless in any setup, specially if you don't use an RTA.
      Yea tried that too, wasnt impressed much - it definitely helps a bit I would say but yes if the HU has parametric eq one can utilize that too.

      And yes DSP of course has to be done with proper RTA else its of no use honestly.

      Pio
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    10. #10

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      balaji.jkb...modern DSPs have several important features....

      They can come good in both active and passive setups

      Superior DAC
      Extensive tuning features - Source equalization, attenuation controls for input and output control, Time alignment, equalizers, import of correction curves, support for external DRC plugins
      Active capability - setting crossovers and slope for individual drivers depending on number of outputs
      Flexibility: Some DSPs allow for even swapping of OPamps like tube rolling
      Multiple sources: Analogue and digital
      App based control
      Option for saving multiple tuning settings
      Car Audio: 4-way active
      Home Audio: Passive

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