Yes, you could get a HT Processor like the Bryston SP3 or Marantz AV8802a and use the "Ext. In" inputs on the back of your Denon to use the Denon "as an amplifier". However, the signal would still be going through the preamp section of the Denon. It would almost defeat the purpose of getting a high quality HT Processor in the first place. Using the Denon "Pure Direct" mode may help a little bit here, but your still going through Denon preamp circuits. So, ultimately, you'll have to decide what is a higher priority for you -- either 4K support or sound quality.
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If 4K support is first priority, then yes you can get an HT Processor now like the SP3 / AV8802a. And then get an amplifier later.
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If sound quality is first priority, then I would say get the amplifier now and use the Denon receover as an HT Processor/preamp. Then get a real HT Processor later.
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If 4K support is first priority, then yes you can get an HT Processor now like the SP3 / AV8802a. And then get an amplifier later.
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If sound quality is first priority, then I would say get the amplifier now and use the Denon receover as an HT Processor/preamp. Then get a real HT Processor later.