Balanced outputs vs balanced design


Friends, I am looking for a balanced tube pre to mate with Halcro MC20. I have since learned that there are single ended designs with balanced outputs and fully balanced designs, like the BAT's. In a response to a thread below the author suggests that the "magic" happens in the amp and that the pre does not have to be fully balanced to benefit from the noise reduction qualitites. If so, is thre any inherent advantage to a fully balanced preanp? And more particularly for my purposes which would not run connects more than 10' from the amp. If there is no great advantage to a fully balanced pre, I can widen my search. As always, tell me about your favorite tube pres to run with this SS amp. Many thanks.
deliberate1
Eldartford is correct; choose your components on sound alone, not whether or not they are balanced.

Some of the finest high end manufacturers build only single ended equipment.

An other linestage I have enjoyed very much and may in fact soundly slightly sweeter on the Halcro MC20 than Ref 3 is the VTL 6.5 Mk2 hybrid. . . still a truly balanced design and truly magnificent. Were I now in the market for a linestage I would consider this device extremely seriously as well.
By the way, tell me more about your experience with the MC20: Strong and weak points? what other amps did you consider? Any other digital amps in the race? What tipped the scale in favor of Halcro MC20?
Friends, thank you for the replies and suggestions. I will check out the preamps recommended, though it is apparent that they are a pricey bunch. I think that a used BAT 5VK is more in my price range - or perhaps a used Atma sphere. Missed out on a very well priced one on Ebay (just over 2k). Drats.
Guidocorona, I wish I could tell you that my path to the the Halcro was the culmination of an exhaustive trial of many contenders. But the fact is that I was looking for a beefy amp to drive a pair of Gallos that I was interested in and read a few very flattering reviews of the Halcro which packs a punch at 400 wpc. I also wanted an amp that does not pump out the heat like my Pass Aleph 3 - the "little furnace." I am a musician and was drawn to the transparent qualites attributed to the Halcro as well. Never figured I'd end up with the Halcro given the $5k price tag. But I got a lightly used demo with warranty from a dealer for $2400 on Ebay. It arrived yesterday and have not had a chance to plug it in. My current system is a Pass Aleph 3 and Blue Circle 21 powering a pair of Newform Balance speakers. It will be interesting to hear the difference between these two very different amps. My plan is to build another system, using the Halcro to push the Newforms which are not terribly efficient. So I need the pre for that Halcro set up. And then I will get a second pair of speakers for the Pass/BC. On the short list are Gallos, Tyler Signatures, Salk HT3's, Zen Adagios, or a Zu product. Not such a short list now that I see it in front of me. Unfortunately I live in rural Maine and do not have the luxury of ears-on trials. But I bought the Pass/BC/Newform unheard and have no regrets. I appreciate any thoughts y'all may have on the speaker end. There are those used Zu definition Pro's that look very nice.....
im wondering if a set-up offers single ended and balanced ins and outs can it be fully balanced? my reason for asking is i have a cairn nitro pre and ko2 amp with a fog 3 cd player . great sounding stuff , but they are the very vague with the spec's , and seem to be some of the least reviewed gear ever. but i do love it fully balanced or not.
11-18-07: Jrw40
im wondering if a set-up offers single ended and balanced ins and outs can it be fully balanced?


Can it be fully balanced? Yes
Does having balanced in's and out's mean it has to be fully balanced? No.

Some manufacturers offer balanced inputs and outputs for convienience, but they tie the negative (-) leg to ground inside the chassis and have single ended internal circuitry, not that there's anything wrong with that. However, the appearance of XLR connectors on the rear apron of the unit does not necessarily mean it is a fully differential unit. For it to be fully differential, it must have mirror interior circuitry for both the positive AND negative legs. This can become pretty expensive, and the results are not always audible. Hence I would say that most equipment is single ended, though some single ended gear will have balanced inputs/outputs.

There is little technical info on the internet about Cairn gear, but from what I can find, it looks to be a single ended design with optional balanced inputs and outputs.

Cheers,
John