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Message started by Lon on 08/05/17 at 21:48:13

Title: ZROCK2 Input
Post by Lon on 08/05/17 at 21:48:13

Steve, a question about input voltage into the ZROCK2. The manual says that it's not recommended to input more than 4 volts. I have a DAC that outputs 5.3 volts in balanced configuration that I was thinking of using into a ZBIT and then into the ZROCK2. If I were to turn the ZBIT fully up and send more than 4 volts into the ZROCK2 what would be the result? Distortion? Any chance of harming the ZROCK2?

Thanks!

Title: Re: ZROCK2 Input
Post by Lon on 08/10/17 at 18:20:51

I know bottlehead was interested in this question. Steve answered this question for me in an email:

The ZROCK2 will simply begin to compress and distort once the input voltage is too high. Zero chance of hurting it. Using a ZBIT is a great solution as the balanced output level can be trimmed down below 4 volts.

Thanks,

Steve

Good news! I think the ZBIT/ZROCK2 input into my Torii Mk III and Taboo Mk IV should yield intresting results to experimentation.

Title: Re: ZROCK2 Input
Post by Bottlehead on 08/11/17 at 08:42:16

Thanks for getting this clarification, Lon. I have the Directstream dac, like you, and want to be able to benefit from the increased output of the balanced outs. Sounds like there might be a fine line where the sound is optimal before clipping, but it helps to know that no damage will be done if the input voltage is greater than 4V. We can experiment freely.

Title: Re: ZROCK2 Input
Post by Lon on 08/11/17 at 14:39:00

Here's hoping that we can use the ZBIT and ZROCK2 and have enough gain at the 4V cutoff point. . . . If not then it will be the CSP2+ and ZROCK2 for me, not a bad thing at all, just a different thing!

I also have a query in to Steve about the possibility of adding a second output to the ZROCK2. That would be handy for me, if I use the ZBIT either it or the ZROCK2 would need two outputs so that I can run one to the Taboo Mk IV (which as a headphone amp really does not need frequency assistance) or to the Torii Mk III (which with its very effective controls doesn't really need need frequency assistance.) If the ZROCK2 isn't able to have dual outputs, I'll send my ZBIT back in for an additional set. . . .

Title: Re: ZROCK2 Input
Post by Lon on 10/20/17 at 18:55:22

Un update: Steve let me know that the ZROCK2 will (now) allow "over 15 volts" at the input, which is really good news for me as I hope to use the balanced output from my DSD (5.3 volts) into the ZTPRE and then into the ZBIT and then into the ZROCK2 when it arrives, and I think I should be free from distortion at my listening levels. Before I was worried. . . .

Eager to play with the ZROCK2! I'm being patient waiting, really I am. But. . . .

Title: Re: ZROCK2 Input
Post by Lon on 03/07/19 at 20:47:45

Things change. . . I see now that I was using PS Audio's then incorrect info about the output voltage of the DSD, which has since been corrected--the actual output voltage of the balanced from the DSD is just under 3 volts, and single-ended half that. No wonder I found the ZBIT such an improvement.