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A question about my Rogue Sphinx II amp

Hey all,

Just starting out building a new hi-fi system. I picked up a Rogue Sphinx II second hand after demoing it at a hi-fi store. The amp sounded amazing compared to others so i found a second-hand deal as many of these forms suggested buying second hand as a first system.

Anyway, so I don't have my speakers yet.. so I've been listening to records through the headphone jack on the amp. 

One thing i noticed was after listing for about 10-15 minutes, i feel like i keep needing to bump up the volume on the amp. I know the whole ear fatigue thing, but I'm not really playing the music that loud. I'd start out at about 30% volume, then 10 mins later need to go up to 50%, then eventually im almost at max volume. 

Is this normal? Do i need to change the tubes?


128x128moogroom

Showing 1 response by big_greg

big_greg
6,687 posts
 
I wouldn't go so far as to call it "theft", but using a dealer's time like that and not purchasing from them is definitely not cool.

In regards to your actual question, many integrateds don't have very powerful headphone amps.  I didn't see any specs about the Sphinx's headphone amp.  If your headphones are hard to drive, the internal headphone amp might not be up to the task.  

The tubes are probably fine.  If one or more of them is glowing, or if you hear ringing, or noise, you might have a bad one. 

Wait until you get your speakers and see how it sounds.  
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