Home > Podcast > AV Rant #390: Phase, Depth, and Cones

AV Rant #390: Phase, Depth, and Cones

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Special thanks to Frank, Shannon, Cesar, and Stephan for supporting the podcast this week. Without your generosity, we couldn’t keep this podcast going. This week, Alex wants to know more about tri-chomacy, Steve from Audioholics links us up to an in-depth article about impedance  and electrical angle (LINK), and Michael found a new reason why a receiver might be shutting down. Shane wonders why we don’t like JBL speakers, Gary disagrees with us about the importance of a center channel, and a nameless Facebook user wants to know about Seiki’s U-Vision upconverting HDMI cable. Jefferson needs recommendations on speakers to match his older Atlantic Technology 450s plus he needs brackets for ceiling mounts, Michael wants to know how to set up his new condo for the best home theater experience plus he has an Audyssey question, Adrian wants our opinions on some Infinity Primus speakers, and Ray sent us a link to an incredible deal on a 4k 50″ display (LINK). Thanks for listening. Check out our Facebook Page. Click here for our YouTube channel where you can see the recordings of our show videos. Download Tom’s FREE superhero-themed ebook Bob Moore: No Hero wherever ebooks are sold (or given away in this case). Visit Tom's website for download links as well as links for the two full-length followups -  Bob Moore: Desperate Times and Bob Moore: Hostile Territory. Friend Tom on Google+ to join in on one of our hangouts. You can listen to our producer Austen and his friends dissect movies at his podcast We Watch Movies.

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  1. Rob H
    July 12th, 2014 at 17:25 | #1

    AV Rant Listener Roland —

    saved Rob H.’s sanity by finding a fix for Google Talk’s automatic microphone input level adjustment!

    Please note, this is for Windows, so I’m not sure about you Mac (and Linux) users out there. But for us Windows people:

    1) Close your web browser and webcam software.
    2) open regedit.exe, and navigate to…
    3) HKEY_CURRENT_USER\Software\Google\Google Talk Plugin
    4) Change the value of “audio-flags” to 1.
    5) Close regedit.
    6) Now give it a whirl!

    So nice to be able to set the microphone level where I want it and leave it there without stupid Google Talk changing it on me! Thanks, Roland!

  2. Rob H
    July 12th, 2014 at 17:33 | #2

    AV Rant Listener Eric M. —

    sent us a link to the Wikipedia article on Ambiophonics, which included the crazy speaker setup that literally had a wall in front of the listener separating the left and right sides of the room so that the left ear would only hear the left speaker, and the right ear would only hear the right speaker.

    Tom was disappointed that the wall shown in the image didn’t include a cut-out for the listener’s nose :p



  3. Rob H
    July 12th, 2014 at 17:37 | #3

    AV Rant Listener Alex S. —

    wanted to recommend the Radiolab Podcast:


    A while back, they talked about how humans and other trichromats perceive color. It’s a very interesting topic, to be sure, and Alex also sent along to the Wikipedia article on trichromacy for all of us to read and enjoy:


  4. Rob H
    July 12th, 2014 at 17:41 | #4

    AV Rant Listener and Staff Writer for Audioholics Steve Munz —

    sent us a link to his article that delves into greater technical detail on the topics of speaker impedance, electrical phase angle, and what makes a given speaker “easier” or “harder” to “drive”:


    Steve mentioned he was aided in writing that article by Rod Elliott from Elliott Sound Products, which is an excellent resource for DIY projects and supplies:


  5. Rob H
    July 12th, 2014 at 17:45 | #5

    AV Rant Listener Paul B. —

    was looking for some genuine 7.1 channel content. We weren’t a whole lot of help this past week in terms of suggesting sources of 7.1 channel music, but for anyone who might want to quickly track down 7.1 channel soundtracks of Blu-ray movies, one great resource is Blu-ray Stats:


    You can use their dropdown menus to filter almost every available Blu-ray title out there!

  6. Rob H
    July 12th, 2014 at 17:51 | #6

    AV Rant Listener Ray Coronado —

    tipped us about the ridiculously low prices at which Seiki’s 4K UHDTVs are currently selling:


    We also talked about Seiki’s U-Vision HDMI cables. They include a Marseille brand 4K upscaling chip inside the HDMI cable itself! It’s a bit of a crazy solution that really shouldn’t be necessary. But since Seiki originally skimped so much on the upscalers built into their first 4K televisions, they decided to put a better chip in an HDMI cable and sell it as an add-on:


  7. Rob H
    July 12th, 2014 at 18:17 | #7

    AV Rant Listener Jefferson G. —

    wants to hang some speakers from his ceiling. The key is for them to be able to support a good amount of weight so that decent sized speakers can be used, and for the brackets to be white or as unobtrusive visually as possible.

    We had a couple of suggestion:

    Axiom Audio ceiling brackets: http://axiomaudio.com/full-metal-ceiling-bracket

    OmniMount ceiling bracket: http://www.omnimount.com/products/speaker_mounts_and_stands/speaker_mounts/stainless_steel_series/20.0_c/

  8. Rob H
    July 12th, 2014 at 18:31 | #8

    AV Rant Listener Jefferson G. —

    also asked for suggestions of speakers that might sonically match well with his existing Atlantic Technology 450 THX setup.

    Rob H. offered the following:

    – Ascend Acoustics HTM-200 SE speakers: http://ascendacoustics.com/pages/products/speakers/htm200/htm200.html

    – In-Ceiling Atlantic Technology speakers: http://www.atlantictechnology.com/products/wall-ceiling-speakers/

    – M&K Sound speakers: http://www.mksound.com/

    And Tom suggested:

    – NHT speakers: http://www.nhthifi.com/Bookshelf-Speakers

  9. Rob H
    July 12th, 2014 at 18:38 | #9

    For AV Rant Listener Jefferson G. —

    Tom also had an excellent suggestion, which was to try getting in touch with Vance Dickason.

    Vance has been designing speakers for decades, and Jefferson’s Atlantic Technology 450 THX speakers are one of Vance’s designs!

    Vance’s speakers tend to all sound far more alike than different, so talking to the man himself might result in some excellent suggestions.

    Vance Dickason is currently affiliated with Lion AV Consultants, so hopefully, it might be possible to get in touch with him there:


  10. Rob H
    July 12th, 2014 at 18:44 | #10

    AV Rant Listener Shane T. —

    wanted to discuss the Haas Effect, also known as the Precedence Effect.

    Wikipedia covers it quite well:


    But for even more details, check out “The Birth of the Array”:


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