What sounds best integrated or separates?

No, I suppose they don't HAVE to have a larger power supply. Generally they do though. Also, it not just the size of the power supply, it's the ability to have multiple power supplies. Just as having more dedicated lines gives your components better isolation from intrinsic generated noise, so will seperate power supplies better isolate the noise from other internal stages.

Did you ever read about one unit having 12 isolated power supplies? Sometimes they'll do this in a high end DAC for example. The more you can seperate/isolate power supplies, from displays, L and R channels, + and - rails, digital and analog, etc, generally the less chance of one area interfering with another.

So no, to enjoy audio you do not need seperates. You don't even need dedicated power lines. However, the further you go, towards isolating components, whether it being adding 6 dedicated lines to your room, and/or going with seperates, the lower the chance you will have of noise from one unit interfering with the performance of another. Of course assuming that you are using interconnects that don't act as antennas. There are enough well made interconnects out there nowadays, that this isn't usually an issue.

Also, I would say that for the same money, and integrated amp and/or cd player is the way to go. For example, I think a $2000 integrated amp has a good chance of sounding better than $2000 for amp AND preamp.

I wouldn't recommend seperates unless you are willing to spend the extra money it will take to capture those last few degrees of isolation/seperation.

John

John; Agreed.

In fact, I just sold my integrated in order to buy some mono-blocs.

;^)

I have been running a CAT JL2 with a CAT Pre and now a Placette Active. I will be trying the Ars Sonum 30 Watt integrated. I have reason to believe that with my speakers, the Merlin VSM-MXs, this little integrated might prove very competetive with my separates. I have no illusion that the ARS is the equivalent of the CAT overall. The CAT can make almost any speaker sound its best, but going back to Tvad's point, a well matched integrated with the right speakers and room size can be very competitive with more expensive separates. I'll know for sure when I get the ARS, but I'm hopeful.

I like the idea of a GOOD integrated amp that takes a good amp and pre subsystem and integrates them with care into the single box with attention to not having one section compromise the other. Same true even if phono section tossed in as well.

Why?

Because the integration has been performed for you by highly trained professionals who know what they are doing and do things that way for a reason. That can save you a lot of heartaches trying to find a good match.

I also like the idea of a good stereo power amp that treates the left and right channel in a similar manner within a single package.

Or if someone you trust has achieved a good integration between a particular amp and pre, then that is a good start as well.

If you go the separates route, be prepared to have to experiment and change things along the way to a good match unless you really know what you are doing. To an audiphil, the journey in this case may have as much appeal as the result. But if you're goal is to get to the best sound possible as fast as possible, take care.

I have tried the integrated route, and Mapman makes a very strong case for integrateds and he is 100% right. On the other hand, I've not been able to find an integrated that can perform at the level of separates in my system, although at a higher cost and system complexity. Maybe the VAC Phi Beta is in that category on an integrated without compromise, but not cheap. I would also think that an integrated with a passive attenuator should not sound to different, maybe better, than the same amp with a separate passive, but I don't think you could the same quality from a built in active pre section in an integrated.