Rotel RHB10 with tube preamplifier, no good sound?

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clavint

  • Jr. Member
  • Posts: 4
Hi, do any of you have a Rotel RHB10 power amp?
I have difficulty combining it with tube preamplifiers, probably due to the very high input sensitivity.
Can anyone confirm this to me?
Thank you

RDavidson

  • Full Member
  • Posts: 2666
Re: Rotel RHB10 with tube preamplifier, no good sound?
« Reply #1 on: 5 Feb 2020, 08:29 pm »
High input sensitivity can be difficult to deal with in general, regardless of whether the preamp uses tubes or not. The problem is gain. You can easily have too much especially if your preamp puts out more than 2v, which many active preamps do. What would probably be best would be to use a preamp with no gain, like a pure passive or a no gain buffered active preamp. Tortuga offers both options, but there are others. Modwright has a buffer with attenuation control in the works also.

WGH

Re: Rotel RHB10 with tube preamplifier, no good sound?
« Reply #2 on: 5 Feb 2020, 09:23 pm »
Look for a tube preamp with a low gain function like the Van Alstine Fet Valve CFR:

Low Gain - to allow better volume control use with the high-efficiency speakers and high gain amplifiers.

https://avahifi.com/collections/preamplifiers/products/fet-valve-cf-slr-preamplifier

I use one and can highly recommend it.