Preamps built Into DACs

Generally speaking in audio systems I prefer simplicity as less is often more. But this preference while good in theory(fewer boxes,power cables,IC etc.)takes a back seat to sound quality-music reproduction. We all will have different outcomes and opinions, no surprises there.

Grannyring my experiences mirrors yours, the better quality active linestages(premium tube models in my case) just sound much better, more complete and realistic to my ears. Those who find DACs with intergrated VC to their liking, congratulations and continued good listening.They just don`t cut it for me.
Regards to all.

I tried both ways with my Nuforce DAC-9 192k and preferred the sound with my preamp in place. When I used the DAC as the preamp it sounded a tad clinical and in your face. For my preamp, I'm using a Placette active and it has an excellent volume control. Using the preamp sounded smoother.

"The reason remains somewhat unclear but to the ones I spoke with it was the challenge of the circuit. I somehow doubt that is why, I think it more an economical one and we need a frank discussion of that."

I can speak to why I did it in my DAC. It was strictly because there was an opportunity to leverage the D/A technology to create a superior volume control with lower noise, distortion and no compression. It's all about performance. My volume technology can only be done within a D/A converter and cannot be adapted for analog circuits. If it was inferior to other active analog volume technologies, I would not have done it.

I believe other manufacturers typically add inferior volume control circuits because their competition adds this feature, so they have to add this feature. Their marketing depts decide for them. This all got started by one DAC manufacturer IMO.

Steve N.
Empirical Audio

"Wonder why no one has build this"

Empirical Audio and Weiss both have it, at least variations.

Steve N.
Empirical Audio

All good tube active preamps probably do improve the behavior of the amps, particularly dynamics, because they have sufficient drive compared to resistive passive linestages or op-amp DAC outputs.

However, and this is a big however, removing them from the signal chain is even better.

What you must understand is that some DAC volume control technologies do not "replace" the active preamp, they actually eliminated it. There is actually no preamp circuitry in the signal path at all. It is exactly like connecting the line-out of a DAC directly to the amps.

When you do this, the distortion, noise and compression that is in every active preamp, even the most expensive, is eliminated. Sound quality is a LOT better IME, particularly when the drive of the DAC is sufficient, like the drive (current) of an active pre.

Steve N.
Empirical Audio