2. amps-preamps
  3. 131822-10803

Low output gain amplifier for ZU 101db Efficient speakers

I am thrilled with my new Rogue RP-5 preamp. However, like I mentioned before, the tube Hiss is really loud (I can hear back of room). It’s a smooth, non noisy hiss. I chatted with Rogue and they are sending replacement tubes but guess it’s due to my Nuforce STA200 amp with output gain of 34db. I was told that was quite high for having such efficient speakers. Rogue told me they test their equipment on high efficiency Klipsch speakers and the RP5 is quiet.

Anyway, I have attenuators coming today to help until I now find a power amp. I would love to have an Atma-Spere amp, however, they are too pricey for my budget (even used). Maybe a used Firstwatt f3 or these Quicksilver monoblock amps that are made for high efficient speakers http://quicksilveraudio.com/products/horn-mono/

The lower priced Decware amps look nice, plus they have gain settings.

For those who own high efficiency speakers with a tube pre, any other options? I really hate to switch out the RP-5 because it has all the functions available on the remote and it sounds great.


aberyclark
aberyclark OP
1,359 posts
 
Almost 2-1/2 years later:

1. I ditched the Rogue RP-5 in favor of a BHK Pre (PSAudio). The difference was major. The pre was quieter with my old NuForce amp.

2. I sold the NuForce and purchased a Firstwatt j2. This amp is beautiful and will run you out of the room when cranked. Smooth tube like flavor with a really deep low end. Right now I could not be happier. 
cal3713's avatar
cal3713
1,421 posts
 
If only every thread was updated by the op like this. Congrats and thanks for finishing it out.
mesch
3,527 posts
 
Yes, Thanks for the update. 
verdantaudio's avatar
verdantaudio
1,500 posts
 
The Art Audio PX-25 is 5w and is brilliant with Zu speakers.  The PX-25 is an interesting sort of "goldilocks" tube which is in the middle between a 2A3 and 300B.  It is not quite as detailed as a 2A3 and the midrange is not quite as lush as a 300B but it is more detailed than a 300B and has a midrange that is more lush than a 2A3. 

Is $8499 above your budget?  
aberyclark OP
1,359 posts
 
I’m actually quite happy with the first watt. Thanks for all the suggestions
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