DAC to Amps bypassing preamp: Opinions please

the only plus going direct is the money savings

I disagree. Going direct, assuming the DAC's attenuation is done well, will give you clarity, purity, and image stability (among other things) that you will almost surely sacrifice some of when you add another component and set of interconnects. That's been my experience. Again, you may prefer the sound with the preamp. It's usually more dynamic, has more "body", and produces a larger soundstage. But it's not all upside IMO.

Smeyers, you are asking the question a thinking man asks, which is why should this be so. Other than impedence matching, which is usually not an issue, no one seems able to give a satisfactory answer. Which makes you wonder... It's a fertile topic for cognitive dissonance, that much is clear.

For the record, I've bounced back and forth for more than 10 years between going direct and using a pre.

Conrad-Johnson is introducing a $6500 "control amplifier", which is an integrated without a traditional preamp section. No doubt some people will use this thing with a separate preamp.

Probably above your price range, but George Mark Audio has a DAC/linestage which includes a true preamp linestage as well as the DAC processor. You could bypass the linestage if you like, although I don't know why you would do that if you're goint to drop $6k on the unit. It is a tube unit as well. This approach I believe is better than the DACs that just have a volume control. It is more expensive and you're not really eliminating the preamp from the equation, but it is also more compact and for those who have a one source system could work fine.

Mahandave - I'm in the middle of figuring out the passive and active dilemma. I have a Joule Electra LA-100 MkIII and love it. It is not mating well with my amp (too much gain overall). I'm using EVS Nude attenuators right now between the amp and preamp to drop the gain so I can get some flexibility on the preamp volume control. I have had a couple of passives in for audition and did not like them, but I do like these EVS attenuators which I tried with my DAC as well. I'll be getting a TVC this week custom built for me by K&K Audio using S&B transformers. This will be the final test.

If we view the audio signal, from its genesis as a 60Hz, 120 volt oscillating wave to its final transformation into mechanical energy in the speaker as something that is going from "closer to perfection" to "farther from perfection," then indeed it hard to see how inserting yet another component mid-chain like a pre-amp can better the sound. Similarly, why would a transport + cable + DAC better a CDP?

But if one views the audio chain like a series of lenses, where each component focuses or scatters; attenuates or amplifies; shapes and filters the differing frequencies of its input by differing amounts, and then passes it to the next lens, then indeed we may not be surprised that adding a component may improve the presentation. After all, we are trying to use information encoded in a physical medium—grooves on a record or pits on a disc—to transform a periodic, 60Hz wave into a highly aperiodic, idiosyncratic force capable of vibrating a paper cone in an incredibly exacting manner. Indeed, multiple, successive lower-gain stages of amplification may be “more gentle” to a faithful reproduction—or at least our appreciation of it.

By separating the pre-amp from both the source and the amplifier, one introduces a new power supply, decouples certain capacitive and inductive reactances (while inducing others), and in general brings a new dedicated stage of attenuation and at least two, if not more, successive stages of amplification. This component is the fruit of countless hours of dedicated labor; one that's been engineered to its own role, and marketed to its own price point.

In the extreme, active speakers show us that we can plug a source such as CDP straight into a speaker cabinet; but there is neither law of physics nor law of the market place that assures us that this, by necessary design, will be either better or worse than the decomposition of an audio chain into its well-known, separate stages.

Just one perspective. Counter-intuitive, I agree.

Smeyers, I agree with you in theroy but the reality is that a pre-amp creates dynamics. It has a sonic signiture (usually) of it's own that adds to the overall system sound. I don't know why more manufacturers don't add better sound to their digital equipment but it seems this market is more concerned with a single piece doing a single job. We seem to be driven to the fact that one piece can't do it all, it is what the market dictates. I feel there are great intergrated amps out there but people want a seperate sexy chassis per item it seems. I am no different, I don't have an intergrated, I run mono's, a pre-amp & a DAC, I also have only two digital sources. In my system for me it just sounds better.

I used my Dac Bolen Modified EAD DSP-9000 Pro with and without a preamp in the chain. Preamps used First Sound,
Canary, Pass and just recently listed Superphon and in all the best sound has been Dac direct into amps. As others have suggested it is up to your ears to decide.