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Multi-Way Conventional loudspeakers with crossovers

John Sheerin got Apple to use horns!
John Sheerin got Apple to use horns!
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Old 13th February 2018, 06:45 AM   #21
diyaudnut is offline diyaudnut  United States
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How many DSP channels, DACs, ADCs for the sensing microphones, and amplifiers are we talking about here?
How did they get it all inside that package?
Any idea about the chips used (other than the A8)?
Just a clean power supply for this thing sounds like a challenge.
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Old 13th February 2018, 08:45 AM   #22
Quip is offline Quip
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Quote:
Originally Posted by diyaudnut View Post
How many DSP channels, DACs, ADCs for the sensing microphones, and amplifiers are we talking about here?
How did they get it all inside that package?
Any idea about the chips used (other than the A8)?
Just a clean power supply for this thing sounds like a challenge.
individually amplified - so 8 amps, DSP channels and so on.
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Old 13th February 2018, 01:55 PM   #23
DDF is offline DDF  Canada
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Originally Posted by Quip View Post
Having actually reviewed the data - there is little evidence the ground plane was intended in the design
Trolling patents a bit more deeply, looks like they account for the boundary:
Suzanne Hardy Inventions, Patents and Patent Applications - Justia Patents Search
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Old 13th February 2018, 04:14 PM   #24
mpmct is offline mpmct  United States
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From whatever I can tell by having moved the thing all over, and into the worst spots I could find for a loudspeaker, they not only have accounted for the plane, but also the on-the-fly rebalancing too. Sounds as good at 6" from a wall, as it does at 60" -- after it does it's recalibration, which takes a minute or so, guessing. I could hear no benefit in mounting it on a base that fit only the diameter of the center base plate, about 24" off the floor, versus placing it on a 12" plane 24" off the floor, or versus a 36" x 120" kitchen island countertop.
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Old 13th February 2018, 05:53 PM   #25
planet10 is offline planet10  Canada
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John Sheerin got Apple to use horns!
From th etake apart video where the guy used an axe to get at parts of it, the tweeters look to be a variation of the Apple eBall (DIY2000) originally made by JBL/Harmon for the 3rd generation iMac and later by Foster for the eMac (a slightly larger one). An edge driven concave aluminum cone.

Click the image to open in full size.

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Old 14th February 2018, 06:34 AM   #26
Patrick Bateman is offline Patrick Bateman  United States
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Yeah I was a little bummed by that. I have a bunch of BMRs and I need an excuse to use them.

But there's a couple of upsides:

1) iirc, Don Keele used these drivers in one of his early CBTs, so they can't be half bad

2) Last I checked, they're readily available on eBay because there's so many out there. I bought about eight for something like ten bucks a few years back.
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Old 14th February 2018, 06:36 AM   #27
planet10 is offline planet10  Canada
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John Sheerin got Apple to use horns!
I have at least 30 of the 35mm versions pulled from eMacs going to recycle. I was thinking of a couple dodecahedrons.

dave
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Old 14th February 2018, 06:44 AM   #28
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ilkless comments on Apple HomePod - The Audiophile Perspective + Measurements!

In the interest of full disclosure, heated debate over the use of 1/12 measurements and the final verdict broke out. As one of the users the review writer consulted I outline my reasoning for endorsing these measurements (even as a keen Toole/Olive proponent) and sum up the characteristics of the DSP based on the measurements, speaker auto-calibration method and Apple's previous comments + video demonstrations.
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Old 15th February 2018, 12:30 AM   #29
planet10 is offline planet10  Canada
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John Sheerin got Apple to use horns!
Limited presentation of date, but another data point never the less.

Apple’s Biggest Claim About HomePod Is Legit, According To Our Acousti

dave
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