I agree with Mimberman, I too have a Havana DAC, it might not be the most detailed DAC around in terms of the quantity of the sound you hear. But the quality of the sound i think is truly high end, for me WE 396A tube for better detail, Tungsol tube for better dynamics. The stock tube isn't bad either, not punchy but it's got a beautiful and lush sound. Regardless of the differences among the tubes, they all produce realistic sound, very true to the timbre. It's definitely a DAC to keep.
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