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Shopping for a receiver

Discussion in 'Electronic Repair' started by root, May 27, 2013.

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  1. root

    root Guest

    It is harder and harder for me to understand speech on TV audio.
    I would like to be able to insert an equalizer into the audio
    playback. Old receivers used to run the pre-amp output and the
    amp input out the back. As shipped, the outputs and inputs were
    shorted together but the short could be removed and an equalizer
    inserted into the loop. Are there any HDMI compatible receivers
    that offer that feature?

    Also, I have been looking for a receiver that offers HD radio
    and I haven't found any.

    Any suggestions?
    Thanks.
     
  2. Robert Macy

    Robert Macy Guest

    True, electrostatic speakers seem to provide the best performance for
    the buck. Back in the 70's there was an engineer that lived in the
    eastbay, Fremont, CA area that made sets of electrostatic speakers
    using readily available materials, standard tools, and kitchen
    appliances. His resulting speakers were 'metalized' mylar shrunk in
    his oven over a framework. Can't remember his name, and lost all
    archival records in the 8 HD crashes we went through. Anybody know who
    this man was?

    As part of his development during the project, he had taken his
    speakers to JBL(?) in the midwest for testing in their lab and found
    that at most levels distortion was barely measurable, at 120dB(?)
    something like 0.1%, and at 140dB just above 1%. The main problem he
    ran into was the 'beaming' effect caused by the size of the diaphragm.
    To minimize that beaming, he actually split the audio into several
    spectral bands and then drove strips of different widths on the
    speakers in order to minimize the effect. Higher frequency narrow
    strip.

    These speakers in combination with 'direct' recordings gave you an
    incredible listening experience. It literally was like sitting next to
    the original musician(s) while they werre playing, but they had
    recorded many years prior.

    Sadly, I never saw the speakers marketed, nor any DIY projects for
    building them yourself. Anybody see such?
     
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