FrankHarveyHiFi:
A few people don't realise the NDS1 ONLY has digital outputs, no analogue ones, so it can't be used for a hi-fi system (unless you have Onkyo's A5VL of course
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You can use the NDS1 with any AV amplifier as they all have digital inputs.
Of-course can be used for a hi-fi if you have standalone DAC.