2. amps-preamps
  3. 1136760481

Who else prefers 5751s and why?

I recently acquired a matched pair of 5751s to try because of all ofthe buzz about these tubes. They are the modest GE brand no black plates etc and I paid a fairly low amount for what truly appear to be NOS about $20 per tube. I immediately rolled the tubes in my tube integrated and was stunned by the improvement in sound, The tubes they replaced were real Telefunkens BTW, I have used Mullards and an assortment of other highly regarded tubes. None had the transparency, detail, both macro and microdynamics these have. The soundstage was also noticebley better even the speed of the amp seemed to improve. Has anyone else had this experience?
mechans
aball
2,018 posts
 
Gotta get the black plates - they are even better than the gray ones. Triple mica is also an improvement.
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samzx12
1,226 posts
 
They have replaced all my 12AX7's with noticable improvement. Mine are the triple mica black plates.
cruz123
586 posts
 
I much preferred the 5751 in a Jolida JD100 CD player I once owned. In fact, I preferred the rather inexpensive JAN GE 5751 to some rather pricey NOS 12AX7's. However, I liked the 12AX7 variant better in a Jolida 302b integrated amp.
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samzx12
1,226 posts
 
Yes the 5751's made a huge difference in my Jolida CDP.
jhendrixfan
40 posts
 
There is good reason that you prefer the 5751s over a regular 12AX7. The 5751 was designed, primarily by RCA, as a low noise, lower gain tube than the 12AX7. It also has other characteristics that make it a little bit different than the 12AX7 (look at the curves).

One of the best versions is the Sylvania GOLD BRAND type. They are now become quite pricey as folks start to use them as substitutes for 12AX7s where gain is not too demanding and reduced noise floor is more important.
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