2. amps-preamps
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Audio Research - should I replace the valves?

I have a AR Ref 110 power amp and AR Ref 3 preamp. Both have done about 3,800 hours. They both work but I wonder if should be replacing the valves.

How can you tell if they’ve had it? Does the sound quality deteriorate & what happens if you don’t replace them?

i don’t think they sounds as good as they did but no pops or whistles or any other strange noises etc - just a bit flat sounding. But perhaps this is just my ears?

 

pp

willmarchant

Showing 4 responses by willmarchant

willmarchant OP
11 posts
 

Thanks, I do have a Fluke. I’m going to use KT120 valves in my 110. Is it the same settings? I looked at the manual and it says you should use 120v AC to adjust the bias. Obviously in the UK we have 240v AC or am I being dim?

willmarchant OP
11 posts
 

Thanks! I didn't realise they deteriorate - i thought the just blew!

Presumably I can't put them in myself as they need biasing (whatever that is!)?

willmarchant OP
11 posts
 

Thanks all. Not sure whether biasing the valves is beyond my skills but will have a read. Stupid question but assume you fit them and then do the bias? (Told you I might not be up to the job!)

willmarchant OP
11 posts
 

I can easily get the AR amps to Absolute Sounds, the importer in the Uk who will replace the valves but I’m told it takes a while and is expensive (anyone any experience of this?). Or I buy and replace/bias myself. But exactly what do I buy/for the Ref 110?

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