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What's the difference between an analogue and digital receiver/amp

Discussion in 'AV Receivers & Amplifiers' started by Glenzo, Oct 26, 2004.

  1. Glenzo

    Glenzo
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    Aside the Digital ones being slimmer, wha't s the difference? Obviously the components are different.

    Cheers
     
  2. Spoonfed

    Spoonfed
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    Analogue amp uses conventional A/B class type transister based amplification.

    This is about 50% or so efficent and requires signal to be "converted" from digital to analogue (given CD/DVD is the source)


    There are a few slightly different digital amp implications. Normally they use Pulse Width Modulation as the "drive" for the speakers. In the case of the Panasonic Digital receivers as example when feed a digital signal (over SPDIF) the digital signal is directly "interpreted" by the amp stage and amplified (ie no DAC's needed) and output to the speakers (so the only analogue stage is speaker output)

    These are approx 90% effecient and hence why can be in smaller chassis.

    Having recently purchased a Panny XR45, feed a good SPDIF they are damn clean and transparent sound, plenty of resolution/detail, great dynamics and fast.

    (oh...... decided on the panny AFTER home demos of 3805 and arcam AVR300 :) )
     

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