KLH Burwen TNE 7000A Transient Noise Eliminator

I still have one of these stashed away in a closet! I’m pretty sure you don’t want to daisy-chain the KLH to another transient noise eliminator.

I consider these items obsolete, because it’s easier to digitally fix the problems they address. But the KLH TNE does work. What makes you think it’s not working? It should reduce the pops and clicks on your records. But these units are old, so if it’s not working, it’s also possible that it’s just past its useful life.

I have been playing with this with a few of my records.  I believe I am using this properly (at least according to the Jay Rose blog reprinting some of the instructions from the manual).  I do notice the high-frequency filter doing its job properly, but I think the unit is introducing more crackle, not removing it. 

I just did a test and engaged the unit with a CD. It was only in the very extreme sensitivity and threshold settings where I was hearing the same noise (crackle) that I noticed on records. This crackle that I'm hearing is music being removed. When I back off on those settings, that crackle goes away. So I guess the unit is working properly.

I guess I still have to learn to properly fine-tune the unit to balance the noise it's removing without impacting the music.

Ok. I played with it more last night and realized that whenever the transient noise eliminator LED lit, I heard a tick (although it could have been a hole in the music from the removal of a noise impulse). If this is the case, should I hear this hole in the music?  I did have my ear next to the speaker listening for this so I guess I should probably try the same passage but sit in my normal listening spot.

I do remember that my SAE unit has the same audible artifact but since the pops it removes are much louder, the artifact is more acceptable than the original pops.

... whenever the transient noise eliminator LED lit, I heard a tick (although it could have been a hole in the music from the removal of a noise impulse). If this is the case, should I hear this hole in the music?

No, you should not hear a "hole in the music." The TNE uses a "bucket-brigade" type delay to replace the click so that there’s no audible effect from removing the click. If you hear a click every time the LED is lit, either the clicks exceed the ability of the TNE to remove them, or the TNE needs service. In proper use, it’s very difficult to detect that the TNE is in the circuit.