“Notice that the model have change from Hw-q90r/za to Hw-q90z. Is their any difference? Also why is it a specialty item? Thank you for any info.”
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I called BestBuy support regarding this and was informed that this model (hw-q90ZA) is made solely by Samsung while the HW-Q90R/ZA has been "tuned" by Harman Kardon and has some "slightly different [read: upgraded] components".
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