Passive preamp w/Rogue Medusa and Rega DAC

His Rega dac get some good raps, even over the Benchmark, in some of the a/b's done.

But you are right Labtec going direct with a dac or cdp that has a digital domain VC is the only way to better the transparency of good a passive pre.

You just have to watch that digital domain VC's are used in the top 75% of their full output, otherwise you can run the risk of "bit stripping". EG: 16bit resolution down to 14bit then 12bit and so on the lower you go with them, if he has very efficient speakers he may not even be able to get to 75% let alone over it, before it becomes too loud for him.

This is when a good passive attenuator is the next best in transparency, as the remote controled digital domain VC of the dac/cdp can be full up then with no risk of "bit stripping", and the volume then set by passive pre attenuation.
And then you can still use the remote volume of cdp/dac within it's top 25% so you can adjust it from your listening chair.

Cheers George

http://www.rogueaudio.com/Contact_Information.htm

Ask your question at the source.

I've always thought that that only way of going one better than using a passive pre from dac/cdp to the poweramps is by going direct if the dac/cdp has a digital domain VC, and so long as it's used no less than 75% of full as I've stated in above posts.

Here is a statement fronm the designer of the TotalDac one of the best digital front ends you can get.
"Volume control:
I have made many different volume controls, including high end pots, relays, Shallco + stepper motor, LDR... The best sound was with the digital volume control made inside the FPGA of the DAC d1, made with a 69bit resolution. It was the only way not to "listen" to the volume control components. This digital volume control allows not to have cables and connectors in the signal path."

http://www.totaldac.com/principles.htm

http://parttimeaudiophile.com/2014/05/30/high-end-2014-totaldac/

Cheers George

Very interesting points about going straight from the DAC to the amp. One thing that I need is a really good remote control. I haven't done the research but I think that may be hard to find. This is something I should look into further.

The idea of a passive never occurred to me until recently when I upgraded the connections between my MacMini to the Rega. I got more detail but I also started hearing more glare. My initial thought is that the preamp was probably more to blame than the Rega. Going with a passive would be affordable and take the Acurus preamp out of the equation. As a bonus it would let me put more of my budget to upgrading the DAC in 2015.

Like most people, budget is a major issue for me. My original plan was to save up and spend 1.5K sometime next year on a good tube preamp. The year after that, I planned to upgrade the Rega DAC - by then I will have a good feel for how to address DSD (do I want it or not).

I may still go down that path but it seems that investigating a good passive (or finding a DAC to go direct to the amp) are worthwhile things to look at.

In the meantime, I will be borrowing a passive to determine if using one is even feasible in my system. Thanks for all the comments. This has been a great thread!

05-30-14: Sruffle
In the meantime, I will be borrowing a passive to determine if using one is even feasible in my system. Thanks for all the comments. This has been a great thread!

Definitely worth a try with your system, to hear it at it's most transparent, dynamic and extended from top to bottom.
Just make sure the one you try has a 10kohm or 20kohm logarithmic (A taper) pot inside it.
And that your interconnects are <100pf (picofarad) per foot capacitance, which quality ones usually are.

Cheers George