K&K Audio / Lundahl Transformers

Re: 1527XL and Oppo 970

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A cursory look at the datasheet reveals that it is a budget single supply 6 channel DAC with single-ended outputs, so there is DC on the audio output lines. The transformer is therefore saturated when connected directly and the sound is distorted. You can cure the problem by interposing a coupling capacitor between the DAC analog output and the transformer primary. There is no way to use the reversed polarity of the differential connection (because it doesn't have one!) here to cancel the DC in the core like you could with the others. Perhaps it's too blunt to say that this cheap CD player isn't worth the trouble, but that would be what I would have said had you asked. :=))

Kevin Carter
K&K Audio
www.kandkaudio.com

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