Sony SCD-1 balanced or unbalanced?

I've been experimenting with this very topic with my SCD-1. In all honesty I can not hear any difference at all! The three cables I've been able to use are NBS Statement, FIM Gold and Nordost Valhalla. In each case the signal (within brands)sounded exactly the same to me. I'm not prepared to tell wich cable I like best and for what reason, but I can say the FIM is third.

I too would like to hear any thoughts on tube pre-amps. The Conrad-Johnson 16&17 are two I would like to hear about.

Balanced cable/CKT can get rid of common mode noise in the CKT(most likely from power line) and RF noise in the air. If you alrady have a stable power line/cable and clean air (free from RF noise), then you probably won't tell the difference. Usually people need it for long cable or in an electronically noisy enviroment.

Balanced cable should have better shielding from RF stuff. On the other hand, things like fiber optic won't be bothered by RF also. Use differential amplification and/or have a good power supply can reduce noise level and have better result.

For me, my preamp is single-ended so I put preamp close to my power amp and keep IC short. Of course, power conditioning will help. For those who has balanced preamp..., you can keep your components far apart with balance calbes and don't have to suffer from noise from air.

My SCD-1 is used with RCA's. It is noise free running straight to a standard wall outlet. I could not detect any change using balanced connectors, which I A/B tested on a Classe DR5 pre-amp. Regarding tube products, the SCD-1 is connected to a Hovland HP-100 preamp. The amplifier is a Mac MC2000 (both tube products that have a grain free sound with great resolution & dynamics). The speakers I've used on this combo are watt/puppy 6.0's and ML Prodigy's. Both sound terrific and have their own separate strengths. I just recently changed to a Pro Silway MKII between the SCD-1 & the Hovland. This is a great combo beating Cardas Neutral References and numerous other Audioquest & Alpha Core cables. I tried a Pro Silway between the Hovland & Mac with zero sucess. The sound was extremely flat. I am waiting on a Alpha Core TQ to test in place of the Pro Silway on the SCD-1 and to test between the amp & preamp. I have found silver interconnects, or combo silver/copper IC's to work best. The Pro Silways are quite remarkable between the SCD-1 & preamp. Great dynamics & resolution with no grain. Of course, poor recordings cannot be overcome by any component or cable.