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loudness control

  1. Raphaz

    Presence control with switchable frequencies on a receiver

    My R-2000 has a Presence Control dial with a switch for selecting center frequencies of 0.8 kHz, 1.6 kHz and 3.2 kHz. According to the user manual, it is meant for suppressing "overobtrusive" (I like that word!) instrument parts or bringing out a vocal part. I'm assuming that in the case of my...
  2. T

    Amp with variable loudness as peak limiter (?) + mids control for intelligibility. For use with headphones, mainly speech.

    I'm in need of some advice, hope you can help. I'm looking for an integrated amplifier for use in professional remote interpreting. It looks as though no headphone amps have physical tone control knobs these days, so they are out of the question. I need physical tone control knobs, preferably...
  3. daylite

    500C Loudness Contour – Modeling and Choosing Component Values

    -The Fisher 500C loudness contour circuit was modeled in SPICE. -Choices for loudness circuit components are discussed. For my 500C project I am considering modifying the Fisher 500C loudness switch circuit. It is a passive filter with three* components: C63, C64, and R91. To get a better...
  4. Peng Li

    Cambridge Audio Azur 650R no digital out...

    Hi Forum, I have a CA Azur 650R from 2010-2011, it worked perfectly for about one and half year ago. And I packed it away for the while. Two weeks ago I took it out and plugged in my system. The direct analog input/output seemed function very well, but I could not get any digital sound out of...
  5. T

    Loudness pot set on one volume, need advice

    Hello all, I'm new here. I just acquired a vintage GE Stereo Classic 7600 Integrated Amp. It's working fine except the loudness control is not working. It is quite loud. So I have opened the top and sprayed some contact cleaner in the pot. The control knob turns, but the volume does not change...
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