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Upgraded Yamaha NS-6490 3-way "bookshelf" speakers. These were factory stock speakers when I bought them in 2020 after researching 3-way speakers. They could not be beat in this price category, and sounded ok when I hooked them up to my 100 wpc JVC Surround Sound receiver. But of course, I could hear there was room for improvement. So after a little more research and some crude frequency response measurements, I determined that the stock crosssovers (2 caps) were wrong for the frequency response of the drivers. The factory crossover frequencies of 2.5KHz and 8KHz were forcing the woofers to reproduce bass AND mids, while the tweeters were being allowed to produce only the very highest of audible frequencies. I replaced the caps with real 3-way x-overs that allowed the woofers to reproduce only lows below 850hz, and found matching mid drivers (made in Germany) to replace the stock (made in Malaysia) ones. Also replaced the flimsy spring wire clips with standard banana jack plates. The results were audible. They now had a tighter and more defined bass profile, and the midrange frequencies, where most of the vocals and instrumentation are reproduced, really pop. The stock Yamaha tweeters are now reproducing frequencies above 4800Hz, where cymbals sizzle. They will be shipped to the lower 48 in the original factory boxes at buyer's expense. Low starting bid! YouTube compression and listening to videos with tiny cellphone speakers doesn't do them justice, but you can listen to them if you like. Flat rate shipping to the lower 48 in the original factory box.

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Listeda year ago
ConditionExcellent (Used)
Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.learn more
Brand
Model
  • NS-6490
Finish
  • Black
Categories
Year
  • 2019
Made In
  • Malaysia

Richard's Retirement Shop

Titusville, FL, United States
Sales:75
Joined Reverb:2017

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