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  1. Old Comment
    abraxalito's Avatar

    Fountek (Rhyme Acoustic) active speaker A-100

    No, not fully discrete - rather a hybrid with opamps for gain and a fully discrete output buffer.
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    Posted 28th July 2015 at 02:58 PM by abraxalito abraxalito is online now
  2. Old Comment
    panson_hk's Avatar

    Fountek (Rhyme Acoustic) active speaker A-100

    A fully discrete one? Will you also design the outlook?
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    Posted 28th July 2015 at 01:19 AM by panson_hk panson_hk is offline
    Updated 28th July 2015 at 01:21 AM by panson_hk
  3. Old Comment
    abraxalito's Avatar

    Fountek (Rhyme Acoustic) active speaker A-100

    Hi Panson, long time no chat! I'm fine, working on a portable headphone amp design at the moment.
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    Posted 27th July 2015 at 11:13 PM by abraxalito abraxalito is online now
  4. Old Comment
    panson_hk's Avatar

    Fountek (Rhyme Acoustic) active speaker A-100

    How are you, Richard? Thanks for your sharing! I have not analyzed the electronic board of A-100.
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    Posted 27th July 2015 at 04:58 AM by panson_hk panson_hk is offline
  5. Old Comment
    abraxalito's Avatar

    Fountek (Rhyme Acoustic) active speaker A-100

    They're using TL084 going on what's written in Chinese. Probably you could increase the working impedance to get better SQ from these opamps - that's been my experience with Taobao sourced active speakers.
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    Posted 25th July 2015 at 02:56 AM by abraxalito abraxalito is online now
  6. Old Comment
    panson_hk's Avatar

    Fountek (Rhyme Acoustic) active speaker A-100

    The A-100 amplifier does not seem to do baffle-step compensation and HF boost. It does more likely attenuate 5 k to 15 k. At 9 kHz, the attenuation is about 6 dB.
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    Posted 24th July 2015 at 08:34 AM by panson_hk panson_hk is offline
  7. Old Comment

    Exploring laptop sound

    Obviously, lost momentum here ... hopefully will finish it off at some stage - did get somewhere with foobar, but still not enough to supplant MM.

    Anyway, found a new, good stress test for playback - Agent Steel, Unstoppable Force - mid 80's speed metal, :). Never heard of this mob before, was put onto the material from the What's Playing thread, was intrigued, and retrieved the compressed audio from YouTube - now, two strikes against it: data compression, detail has been lost; and the recording has everyone going at 100 mph ... how good is the playback on this, ;)? In particular, how well does the drummer's contribution, and vocalist come through?

    As a result of this I've altered the settings of MM; I'll run with the new config for a bit and see how it comes together, longer term.
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    Posted 4th July 2015 at 07:33 AM by fas42 fas42 is offline
  8. Old Comment

    Audio Op Amps

    Well written, thank you!
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    Posted 1st July 2015 at 12:26 PM by CHiroshi CHiroshi is online now
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