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Old 01-28-2017, 07:04 PM
ariess ariess is offline
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Default How many hours do you get from your Ref 10 6550 tubes?

How many hours do you find you are getting from the 6550 tubes in your Audio Research Ref 10? When did you decide to replace them?

(mine sound great after 2500 hours which seems surprising, though half those hours are idle).
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Old 01-29-2017, 02:01 AM
tima tima is offline
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Quote:
Originally Posted by ariess View Post
How many hours do you find you are getting from the 6550 tubes in your Audio Research Ref 10? When did you decide to replace them?

(mine sound great after 2500 hours which seems surprising, though half those hours are idle).
Fwiw, the manual says: "The vacuum tubes inside your Reference 10 are quality tubes and with normal use should not need to be changed for approximately 4,000 hours
of use."

Sometimes we don't recognize gradual changes occurring over time. Did you swap in a new pair of 6550s to compare to the one's with 2500 hrs on them?

Last edited by tima; 01-29-2017 at 02:03 AM.
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Old 01-29-2017, 08:58 AM
ariess ariess is offline
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Quote:
Originally Posted by tima View Post
Fwiw, the manual says: "The vacuum tubes inside your Reference 10 are quality tubes and with normal use should not need to be changed for approximately 4,000 hours
of use."

Sometimes we don't recognize gradual changes occurring over time. Did you swap in a new pair of 6550s to compare to the one's with 2500 hrs on them?

I did. At 2500 hours they haven't lost anything compared to new ones.

What are others experience?
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Old 08-13-2019, 05:52 AM
Mikeoz Mikeoz is offline
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Quote:
Originally Posted by tima View Post
Fwiw, the manual says: "The vacuum tubes inside your Reference 10 are quality tubes and with normal use should not need to be changed for approximately 4,000 hours
of use."
My Ref5SE manual also has this statement this but does it refer to the 6550 or the 5 6H30s ? - or both ? I read somewhere the 6550 should be changed more frequently.
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Old 08-13-2019, 10:18 AM
ariess ariess is offline
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I have more experience with this now. It depends a bit on how resolving your system is but most 6550’s will lose their pizazz after 1000 hours. It’s critical to have a fresh set to determine if you should replace them. Swap in the new after 1000 hours and see if you hear a big difference. If not, stay with the old until you do
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