Modding the EMC 1-UP has a positive effect on all digital outputs. Unfortunately, unless the transformer is replaced, the outputs are all 75 ohms. The balanced outputs would be 75 ohms as well, which is a mismatch and will cause reflections. With the stock player, the risetimes are very slow on the digital outs, so it is possible that the AES/EBU connector might sound better even though there is a mismatch. The mods speed-up the risetimes from 25 nsec to 5 nsec. This allows the use of all lengths of cables. With slow risetimes, it is advisable to use longer cables, at least 1.5m. I prefer to wire only to the connector that the customer wants to use and disable the others. This provides the cleanest, jitter-free signal.
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- 33 posts total
- 33 posts total