Sounds like a genuine product, I'll give it a try! How much for a bottle and where can I obtain some?
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Yours is a complete reversal of my findings.
A recent visitor to my music group brought a Classic Records RCA repress that he had cleaned with his VPI machine and Disc Doctor fluid. We had been playing my LP's (which are all cleaned with RR fluid) for about an hour when he ask if I would play a selection from his record. This record exhibited more background noise than any selection of the evening.
One point of your review on which we (appear) to agree. The Disc Doctor fluid results in a recessed and darker presentation. In addition, the DD fluid delivers less resolution, sparkle and extension in high frequencies when compared to my Record Research cleaned LP's.
Having experienced this myself with Disc Doctor, I ask permission to reclean his record. I used my VPI machine and applied Record Research Deep Clean, followed by Record Research Vinyl wash. We then played the same selection as before.
There were six people listening that evening and the results were so obvious that the count was six to zero in favor of the Record Research. Quieter background, lower distortion and extended bandwidth.
Based on comments on this thread, this must be a system thing, those who like the darker sound or the clearer sound. The good thing about Record Research is that I does require rinsing. The reason the Disc Doctor spreads around the LP so well is because it DOES contain surfactants that are difficult to rinse and why it benefits from a water wash afterward.
If you rinsed it enough to remove ALL traces, you might get sound similar to what is achieved with the Record Research (two solution) combo.
Albert your experience is interesting but it does differ from my listning results. I did not find the RRL cleaned record quieter or clearer. When done properly with 2 seperate tube assemblies so the distilled water will not get contaminated with the Disc Doctor fluid my records are very quiet and removed the RRL glair I noticed in the review. I don't feel the sound of the DD is darker rather more revealing espically with musical nusances. The overall presentation was in my view more accurate to the recording, at least on my playback system. If the DD record is not cleaned properly and all of the residue removed (most important) there will be excess noise from the strong cleaner left in the groves of the record. Since you did not personally do the Disc Doctor cleaning yourself you are relying on the person that brought over the RCA record that is was done correctly. In any event the RRL cleaning fluid is still good and I was happy with it for a number of years but as previously mentoned in my view the Disc Doctor gives superior results. John