I don't think my ModWright LS36.5 is overly lush, but it's pretty darn good; works great with my Pass as well.
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I should correct my spelling
Brackert Labs Rhumba is the preamp
it has solid state rectification as does CJ , I think. The CJ et3 & et5 were forward and detailed in highs, et5 was much better highs ( tie to Teflon caps?)
ive listened to a Cary Sli-80 and it had tube rectifiers & was very soft( I assume that is lush?) in the high end ( but an integrated)
it was listenable on highs, but soft, soft, on the rest of Frequency spectrum
ive read that " Leben, Shindo, etc all " all use tube rectifiers ?
It's to bad I can't hear all the preamps in one spot ( lol)
never heard a Joule ( I think Cary & Joule are tube rectifiers, too)
Dazed and Confused
I haven't had the pleasure of hearing either of Backert Labs new preamps but I am familiar with the Backert's and what they look for in sound. If you are looking for something to ameliorate upper midrange prominence I would look to cj. The Backerts have always striven for a dynamic, tonally neutral sound. Not saying there gear would be in anyway bright, just neutral through the audio frequency range.
Consider the Cary SLP-05 tube amplifier with tube rectifier power supply. In my experience it is "lusher" than the CJ. It was Densis Had's no holds barred pre-amp and is a real upgrade from the SLI-80. It is quite detailed and lush at the same time It has a high output impedance, so you should have a high input impedance on your amp. Had is no longer with Cary, but they still sell and support the SLP-05.
Prima Luna is also popular with many, although I do not have any experience with it.
I’m using a Mapletree Audio Design line stage. 2 chassis with tube rectification. I’ve stopped looking for better. They are custom built in Canada, and not very expensive considering the performance. Check them out here https://hollowstate.netfirms.com/.
Good luck! ! !
I recently added a Vinnie Rossi LIO DHT Pre to my system (Daedalus, Wells Audio, Lampizator) and it sounds fantastic. The most harmonically complete sound Ive ever had. And as far as any glare or harshness, it is smooth as Ive ever heard in my room, yet dynamic and lacking nothing imo... With the DHTs implemented this way, you will not even think of needing or wanting tube rectification.
I should add that I have very sensitive hearing to high freq glare and/or harshness. It is no longer present in my system.
I have mostly used tube PreAmps with my tube Amp and am very happy with tube PreAmps. Currently I have Reimyo CAT 777 as Pre on my system. Its tube complement includes two 12AU7s for amplification, two 12BH7As as tube buffers, and two 6X4WAs as tube rectifiers. I think they are all GEC NOS tubes as originally installed by the company. I am very happy with it and have stopped looking further .