The XLO Test CD works very well but you have to follow instructions and run it continuously for two - count em! - weeks. Then you will be impressed. Rome wasn’t built in a day. 😬 What hiss noise? Tape hiss noise? Did you use the Isotek disc to position your speakers?
Shout out for the original and still the best for speaker placement plus the burn in track works very well - XLO Test CD. I’ve only mentioned it like a hundred times.
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