auricgoldfinger

A graphene DC cable would be most interesting. I have graphene in various components and cables in my audio system, and I believe there is something to it.

Yes, two pieces of equipment can be plugged into a dual rail supply. Paul once wrote me the following in regard to a dual rail supply: "There is a slight sonic penalty with having all the transformer secondaries on one transformer core as nothing is absolutely perfect and there will be some small level of interaction due to transient load current swings. This may be audible in a high-resolution system but it would be rather subtle due to the very high supply line rejection of the voltage regulator circuitry in the DR mode." The SR5 that you are contemplating will not have DR (double regulated) circuitry as it is not part of the standard SR5 offering. You will have single regulated (SR) circuitry instead. Nevertheless, in practical terms, any interaction would probably be so minimal that you would normally not be aware of it.

The primary benefit of dual rails is the lower cost per rail. There are also efficiencies from having two rails located in the same case. For example, only one power cord is needed, and less space is required on your shelf. Theoretically, there could be some interaction between the two rails that could slightly diminish sound quality.

Use it with your EtherREGEN!

sold

Thanks to you and @paulhynes for taking the time to pull all of this information together.

Is your pre-owned SR7 an XL model?

This is exactly what I hear, too. As the first NUC user to recommend the Apacer memory, I didn't want to risk overstating the change and have others be disappointed. Hence, my description was more conservative. Yours is more accurate.

That's an interesting way of framing the question. For now, I'll defer to @elan120 for his perspective since he has done more tweaking with AL and his NUC than I. I haven't tried one SIMM yet, but it's on my to do list.

@Mark (Paul Hynes Design LTD) is not affiliated with Paul Hynes, the man, and builder of custom SR7s. He is an employee of Paul Hynes Design LTD, which is a distinct company which presumably has licensed the right to build certain power supplies originally designed by Paul Hynes. Although I wish it were otherwise, I believe Mark has limited ability to coax Paul Hynes into being more forthcoming about his custom SR7 business. Beleaguered SR7 customers have repeatedly beseeched @paulhynes for more transparency, but for some reason, he appears to believe the best business strategy is to remain unaccountable. An occasional post to this thread does not necessarily have to be a time consuming expository essay that would detract from his limited bench time.

Unfortunately, I’m not set up to make such a comparison. Since all of my PSUs are either 19v or 12v, I have no equivalent to the 16v PP2 for use on my HMS, which requires a 15v or 16v power supply for optimal sound quality. I know from past experience that a certain coveted DR 12v rail had minimal benefit relative to the stock 15v SMPS, while the 16v PP2 + 16AWG Neotech UPOCC 7N copper DC cable makes a more obvious improvement. While some might question my finding that the 12v DR rail has a negligible effect on the HMS, I do not believe their HMS as well as both digital interconnects are grounded directly to an active ground block as are mine. In my experience, this type of grounding lowers the noise floor, which in this particular use case is possibly negating most of the benefits of the “quiet” DR rail running at less-than-optimal voltage.

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Yes, definitely worth the price of the upgrade.

What are you using for a server now?

I'm unaware of anyone who has heard a Farad Super12, much less compared one to an SR7. What is basis for your comment? Thanks.