Quite on target with the Dolby frequency response graph from figure 14B of You can see the slight +4dB elevation at 8kHzĪnd -2dB dip around 11kHz in the A60 frequency response.
#Dolby atmos demonstration disc august 2014 driver
Or just a sonic nasty from the driver or a combination of both. The partial horn loading of the enclosure that the driver is seeing in the cavity Measurements we’ve ever seen in a loudspeaker that has graced our labs in our 15+ The A60 speaker module exhibited some of the worst frequency response That’s a -7dB delta and yetĪnother reason why the A60 is not really a good match as a mating Atmos speaker Specify sensitivity for the A60, I measured about 85dB as you can see in theīP8060ST is rated at 92dB SPL on-axis at 1 meter. Toole pointed out at CEDIA, we don't hear high frequency nulls and thus it's not necessary to incorporate them into a speaker crossover design. Purple: 1ft, Gold: 1 meter, Red: nearfield (no smoothing)ĭolby Atmos Speaker Target Frequency ResponseĪs Dr. I set the A60 Atmos speaker module on a 32" stand firing up at the ceiling with the microphone from my LMS system above the driver with the proper offset to account for the angled baffle and measured at the various distances as shown below in the measurement graph. Tweeters in an MTM configuration with an additional 4.5” rear firing mid/wooferĪnd 1” rear firing tweeter which contributes significantly to the overall In regards to the venerable BP-8060ST towers that employ dual high performance Much a 3” paper driver can do, and these speakers are no match tonally orĭynamically for even modest two-way bookshelf speakers. The A60 sounded more compressed and boxy the harder it was driven.Īs I drove the A60’s harder, they tended to
Of reflecting sound rather than a specific design flaw of the A60 module. State sounds were still easily localized, but I fault that more on the physics The more reverberant room acoustics of this listening space was providing a Vocals, emanating from the Atmos speaker producing it from any seat.įamily Room system and found the A60s did a more convincing job at producing When I turned off all the speakersīut the Atmos modules, I could clearly identify steady state sound such as male In my two rows of seats, only the primary row pulled Shouting “Bailando” sounded as if his voice was elevated near theĬeiling. I also found if I sat too far away from the Atmos modules, theĮlevation effect evaporated, while if I sat too close, the speaker was tooĮasily localized. Only the little kid at the beginning of the song Sound, but the male vocals sounded like they were coming from the AtmosĬompanion speakers. Transient sounds like the snare drum hit or claps did project an elevated I was quiteĪmazed at how well the ear level surround speakers produced an elevated effect I also enjoyed the more precise sound of them being off as well. While I enjoyed the elevation sound of the Atmos speakers, To fold back into the surround speakers helped to clear this sound upĬonsiderably. Turning off the Atmos modules and allowing the rain sound Was around me, and it lacked the clarity and detail I’d expect to hear from a Up above me, hitting against trees in the forest. However the rain didn’t quite sound like it was coming from TheĮcho effects at the very beginning, as well as the cricket and bug sounds Long) as I could just listen to the sounds of nature all day long. This is a wonderful-sounding clip and it’s a shame this demo is so short (1 min To the Dolby Atmos demo disc and applying the Dolby Surround Upmixer (DSU) toĭiscrete 5.1/7.1 and two-channel sources. As a result my Atmos demonstration was limited Released at the time of writing this review was the Transformers 4 movie, which Limited, and I will get into how this affected the overall timbre match of the The pink noise revealed the A60s were extremely narrow band However, the Definitive A60 Atmos speakers were a different Matched my RBH speakers extremely well, as confirmed via pink noise and program Test with speakers consistent with a $2,000 A/V receiver. With the exception of my über expensive center channel, I tried to Player and all speaker cables and interconnects were provided by Blue JeansĬable. The source was Oppo’s BDP-105 Universal Blu-ray Surround speakers, with a small but potent Velodyne MiniVee subwoofer toĬover the low frequencies. The center channel and RBH 41-SE/B bookshelf speakers for the Speakers were used as the main front channels, Status Acoustics 8C for The core of the test setup was the recentlyĪVR-X5200W A/V receiver with four A60 Atmos Elevation speaker modules. Is a large untreated open room with 10’ flat ceilings. Which is an acoustically controlled listening space roughly 6,000 cubic feetĢ. Set up the Definitive Technology A60 Atmos modules in the two listening rooms:ġ.
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