S503u has the latest Spiral II DAC.
Left (503 - OLD DAC) Right 503u with Spiral II DAC.
Warranty Repair
The customer is responsible for freight charges to ship the product to us for diagnosis and repair.
If the repair is determined to be covered under warranty, we will ship the unit back to the customer via the same shipping method in which it was received at no cost to the customer.
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Do you mean the cd player now has included the latest ‘perceive’ (s512) dac? Or is it a different dac to the ‘perceive’ dac