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Thread: DSP crossovers and Phono Stages?

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    Junior Member cosmicjazz's Avatar
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    DSP crossovers and Phono Stages?

    DSP crossovers and Phono Stages, share your thoughts....

    It's a big compromise to the phono signal?

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    I'm going to say no on compromising the signal.

    Properly set up a DSP crossover can "fine tune" a speaker system in ways an analog crossover can never do such as driver time alignment, phase response, band pass output EQ, band pass output limiting.
    Ok there were some analog crossovers that did have output limiting and some with EQ in the form of plug in cards or modules.

    What DSP are you looking at using?

    There is no DSP that I'm aware of that can directly take a phono input.

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    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by cosmicjazz View Post
    DSP crossovers and Phono Stages, share your thoughts....

    It's a big compromise to the phono signal?
    Are you asking if digitizing an analog signal from a phono section is too big a compromise? I guess Iím not sure what you are asking or saying.


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    Senior Member Ian Mackenzie's Avatar
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    Quote Originally Posted by cosmicjazz View Post
    DSP crossovers and Phono Stages, share your thoughts....

    It's a big compromise to the phono signal?
    If you can tell us more about your overall system it would help an appropriate response.

    There are phono stages and turntables that feature an AD conversion. Is it a compromise? That depends on why you might want to convert vinyl to digital and the budget you have.

    As a rule those who have invested in an expensive turntable, arm and cartridge are unlikely to consider an active crossover unless itís necessary (like a Jbl 4345 or 4355) and preferably not a dsp active crossover.

    The compromise is in the user implementation unless set up by the loudspeaker designer in the consumer hifi space. That also applies to analogue crossovers. There are some very good examples OEM dsp loudspeakers featuring the DEQX crossover and they have been specifically set up and integrated into the design by the loudspeaker engineer. They are generally hi end systems over $50,000. What l am referring to here is legitimately integrating an active crossover to a specific loudspeaker.

    In the diy home audio space itís s case of deciding what suits your needs and your budget.

    Dayton Audio have a cool low cost dsp crossover you may wish to try. There is a learning curve with any active crossover so be prepared to spend some time making adjustments.

    What you have to bear in mind is that popular music is generally mixed and mastered on several different kinds of loudspeaker monitors so engineer can gauge how the recording will sound at home. Yes this is true. If you start messing with the mastering EQ when you plug in a dsp active crossover (in other words attempting to make the loudspeaker perfect) then you will end up with a different rendition to that which the artist and engineer intended. So it might sound odd. That is why loudspeaker manufacturers like Dynaudio have scaled back on dsp processing in their active loudspeakers to just assisting with the loudspeaker room placement generally. At home you wonít know what the engineer intended so a safe place to be is to screw with the signal as little as possible.

    This may awaken some discussion but there is irrefutable logic here.

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    Administrator Robh3606's Avatar
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    DSP crossovers and Phono Stages, share your thoughts....

    It's a big compromise to the phono signal?

    I am a little confused as well by your question as it gets a bit complicated. As Mike said no DSP will take a signal at the level even from a high output MM not getting into MC. For it to happen you would want to be at line level past the phono stage. The phono stage amplifies and does RIAA EQ. In better pre-amps they also allow you to vary the loading for the cartridge so you could optimize the response up top.

    Do you have an analog pre-amp with a phono stage or a stand alone phono stage?

    After that it's really no different than any other line level analog signal you would convert to digital and use DSP to process. Really a preference issue as I see it. To some Analog guys it would be sacrilege, me I would be open to try it.



    Rob
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    Senior Member Ian Mackenzie's Avatar
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    Perhaps the OP does not appreciate the Day the Earth stood still around here was the day after the last driver rolled of the line at Northridge.

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