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Description
The Quantum Labyrinth: How Richard Feynman and John Wheeler Revolutionized Time and RealityThe story of the unlikely friendship between the two physicists who fundamentally recast the notion of time and history In 1939, Richard Feynman, a brilliant graduate of MIT, arrived in John Wheeler's Princeton office to report for duty as his teaching assistant. A lifelong friendship and enormously productive collaboration was born, despite sharp differences in personality. The soft spoken Wheeler, though conservative in appearance, was a raging
The story of the unlikely friendship between the two physicists who fundamentally recast the notion of time and history In 1939, Richard Feynman, a brilliant graduate of MIT, arrived in John Wheeler's Princeton office to report for duty as his teaching assistant. A lifelong friendship and enormously productive collaboration was born, despite sharp differences in personality. The soft-spoken Wheeler, though conservative in appearance, was a raging nonconformist full of wild ideas about the universe. The boisterous Feynman was a cautious physicist who believed only what could be tested. Yet they were complementary spirits. Their collaboration led to a complete rethinking of the nature of time and reality. It enabled Feynman to show how quantum reality is a combination of alternative, contradictory possibilities, and inspired Wheeler to develop his landmark concept of wormholes, portals to the future and past. Together, Feynman and Wheeler made sure that quantum physics would never be the same again.Shipping Notes
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4.1 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 5
8.5 sound out of the box! (Want bespoke configs? Sorry.) Great Value, Easy Setup
Style: AVR-X1800H
Excellent unit. Off the shelf sound is very nice, but every room is different, so a bit of tweaking is usually required. Accessing the EQ settings takes a bit of sleuthing and the use of its app... which is subpar. The app interface can only be explained as designed by people who must not actually use it. Still, a wonderful machine at a fair price. I run in ECO mode and it powers my 35x47 room with plenty of power to spare and NEVER gets hot. I am running Infinity Reference speakers and a Klipsch sub in a 7.1 config.
I highly recommend the use of the included Audyssey calibration microphone! My prior experience with Yamaha YPAO left me wondering what was the point. This time with the Denon, it set up the speakers, (i'm embarrassed to say) better than I did on my own. (To be fair, I'm sure Yamaha has improved its YPAO in the decade since my prior purchase)
Bottom line. If you want maximum flexibility on EQ. Shop a different solution. However, If you want quality sound with 4K and up to and including ATMOS processing, with minimal tweaking, or just want to unbox and play, this is a wonderful unit at a very fair price.
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Reviewed in the United States on April 20, 2025
★★★★★ 4
Does well for my needs
Style: AVR-X1800H
I got this to replace a Sony head unit that was starting to fail after 10 or so years of use. This one doesn’t have the same power output, but I use Bose speakers. Bose is fairly low wattage for the most part so no problem there.
Setup was fine. My only complaint is that center channel only dialog is too quiet. I need to adjust that. Everything else is great. I don’t care about Internet connectivity, but it has that if you want it.
I’m very happy so far with this unit.
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Reviewed in the United States on October 1, 2025
★★★★★ 5
Love denon
Style: AVR-X1800H
Value for money,looks and connection quality
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Reviewed in the United States on March 16, 2026
★★★★★ 5
Nice AVR
Style: AVR-X1800H
Refurbished and looking like brand new. One small scratch on the side. It went in a cabinet and it's hidden. All paperwork seemed to be there. If I didn't know it looks like factory sealed . I've got an older Denon. Just wanted to move up to 7.2. Audyssey recognize a second sub. But neither did my older on. No problem with that though. Just FYI. After the original setup and minor tweaking it sounds fantastic for me. I haven't had it but a few days and I hope I get many years of enjoyment from this
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Reviewed in the United States on May 29, 2025
★★★★★ 5
Love it.
Style: AVR-X1800H
Love my Denon AV-1800 ....
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Reviewed in the United States on August 9, 2025