Shindo Monbrison better a RedWine Isabella?

The Monbrison will drive anything. The Zout is very low. It is sometimes misstated as 5K but that is actually the minimum recommended load.

The Monbrison's output impedance is 5k. I think you are mistaken about it being able to drive anything.
All of the Shindo preamps higher up than the Monbrison in the line-up do have low output imdedances that can essentially drive any amps because they have transformers that lower their impedance. The Aurieges, Aurieges-L and the Monbrison do not and, consequently, their output impedance is in the 5k range. You must be more careful matching amps with the Monbrison than a Massetto, Giscours etc.

Everybody is an expert... If you want answers about proper or improper matches, just email. Asking questions, especially of a technical nature, on forums result in poor and often incorrect info. And many times answers with an agenda.

The input impedance of ther Redwine is 100K ohms, where is the problem or debate? Any pre-amp will work technically.

And Shindo and Manley are quite different in every respect. Not a commentary on sonics of one or the other, just an FYI that the comparison is incorrect.

Thanks for chiming in, Vinyljh. FWIW, I was repeating what I'd heard from you awhile back concerning the drive-ability/Zout of the lower-end Shindo preamps.

Of course you are correct that it's best to seek information from people who sell & know the product best and that this question is moot anyway with the RE gear.

(And FWIW I did occasionally use my Monbrison with a solid-state amp with low Zin (10K) and experienced none of the issues associated with an impedance mismatch. Which I'm sure won't be surprising to you!)

Doesn't surprise me Paul:-) I see the same misinformation repeated over and over on forums- mostly by non-Shindo owners without any real knoweledge of the product. I suppose they're simply repeating what they've read in yet another misinformed post. Quite frustrating as you can imagine. A simple email answers most questions while posting simply gets a bunch of hypotheses on the subject.

And to squash another piece of misinformation- repairs have never been and will never be an issue. Shindo is in business since 1974 and has warehouses of parts new and old. Plus, the point to point wiring makes repairs less problematic as compared to say a burned circuit board or better yet a broken CD transport just a few years after its production has ended... which is less likely to be fixable... Its quite odd to be frowned upon for using much better parts and tubes than the usual suspects. And we'll see which is working in 20, 30 or 50 years... a modern Solen cap or a Sprague Vitamin Q.