JJ 5751 Preamp Tube
This 5751 is a drop-in replacement for any 12AX7. The 5751 was designed as a "ruggedized" high mu, dual triode tube with similar specifications as a 12AX7. However, with 30% reduced gain, the 5751 is a fantastic way to tame a distortion stage and tone shape an amp. These "short plate" JJ 5751 utilize a "short plate" design. tubes have great compression and harmonic complexity, perfectly suited for creating articulate midrange and warmer high end response.
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I ordered two jj 5751 tubes for my 68 custom deluxe reverb reissue. I got one tube
for each channel because the amp is noisy and has alot of idle hiss. These tubes are amazing for the price. I payed $4 for the low noise and microphonics test for each tube which was well worth it. These tubes sound warm and have great tone and low noise. I have found my favorite v1 current production tube. I prefer these jj 5751 to the jj 12ax7 smooth highs and tight low end just buy some and try it out for yourself. I'm stoked!
reviewed by: Dereck Dempster
Got 3 of these (w/ balanced triodes, low noise, matching option) to replace the factory Sovtek 12AX7 in my Crate Vintage Club 20w. Sound amazing and gave me a usable clean tone. 5751 cut the gain by 20% giving you better cleans. Best thing I've done for that amp.
reviewed by: Daniel
I recently bought a PRS Sonzera head and had excessive "hiss" on both channels. I contacted PRS and the rep hinted at using 5751. I did my research and replaced V1 and V2 with 5751's. The hiss was eliminated the gain channel imporved. I also replaced V1 with a 5751 in my Fender Deville to help the volume sensitivity. It worked. The Deville tube change was subtle, but I could hear a difference which I preferred. For the nominal price, you can't go wrong to try it for your application...........
reviewed by: David Philen
I've used this as a 'lower gain' V1 in guitar amps. They work great in that application. Very clean sounding tube with little coloration as V1.
reviewed by: Bryan Kolaczkowski