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  1. LSPhil

    Blind test to try for yourself immediately: $ 78 turntable against $ 500,000 turntable

    The B recording is +5dB Bass louder. In the range of 5-8Hz we see System vibration which causes unnecessary loss of amplifier power. Every bezie smartphone sounded better than an LP
  2. LSPhil

    Aiyima A07 Max - Aiyima's new TPA3255 amplifier with mono/stereo output

    I am not English, and I am using a translator, so if anyone feels offended by my English, please stop reading. I have an amplifier DIY version of the TPA3255 amplifier, and I can confirm that it can easily produce 2x250W in stereo without major issues. I haven’t tried mono, but I am convinced...
  3. LSPhil

    Multi-Channel, Multi-Amplifier Audio System Using Software Crossover and Multichannel-DAC

    I understand, you want me to leave you alone. If you don't want or can't answer the questions directly, there must be good reasons for it, and you don't even need to share them with us/me. Best of luck and stay healthy.
  4. LSPhil

    Multi-Channel, Multi-Amplifier Audio System Using Software Crossover and Multichannel-DAC

    Ok, from your post I gather that your concept, based on your experience with the passive and original crossover of the NS1000, was implemented in such a way that by adjusting the DSP parameters – namely frequency and filter slope – you kept tweaking until you achieved a similar effect. This is...
  5. LSPhil

    Multi-Channel, Multi-Amplifier Audio System Using Software Crossover and Multichannel-DAC

    Hello, I’d like to point out that here on this forum, we’re not audio engineering students but regular folks, often pressed for time and not keen on reading through numerous links that lead to even more references. I think even AI would understand and provide a straightforward answer to a simple...
  6. LSPhil

    Let's share diagrams (and photos) of our total physical audio system and the whole signal path, with a few words and/or links

    Okay, returning to those chassis that are not recessed into the front panel, I'm not quite sure how this affects the amplitude response, but it seems to me that it doesn't have a significant impact other than looking more aesthetically pleasing when recessed. The speakers are still in the...
  7. LSPhil

    Let's share diagrams (and photos) of our total physical audio system and the whole signal path, with a few words and/or links

    In modern speaker design, copper and aluminium rings are often used in the magnetic gap of the driver. These rings are employed to improve the speaker’s performance in several key ways. Copper or aluminium rings help to reduce distortion by minimising the non-linearities in the magnetic field...
  8. LSPhil

    Let's share diagrams (and photos) of our total physical audio system and the whole signal path, with a few words and/or links

    I'm certain you've compared speakers with relatively heavy diaphragms, such as the Scan-Speak Revelator 32W/4878T00, to models like the SEAS Excel W26FX002 - E0046-08S. Look at my 2nd photo. You have probably noticed that my resonances in the room are very distinct. Why do you think this is so...
  9. LSPhil

    Let's share diagrams (and photos) of our total physical audio system and the whole signal path, with a few words and/or links

    A friend asked me to do this, so I had no choice but to present to you a three-way system based on 3rd order Butterworth acoustic filters. The woofer I’m using is a very affordable Dayton Audio RSS315HF-4, which features three shorting rings in the motor that help keep distortion impressively...
  10. LSPhil

    Multi-Channel, Multi-Amplifier Audio System Using Software Crossover and Multichannel-DAC

    So, from what I can see, based on your diagram, you've simply defined all the filters as second-order Linkwitz-Riley without taking into account the amplitude response. You’ve also added a first-order Butterworth filter and come up with something. If this is how it’s done, you'd likely get the...
  11. LSPhil

    Multi-Channel, Multi-Amplifier Audio System Using Software Crossover and Multichannel-DAC

    Of course you can. Many companies such as Canton, Isophon, KEF, JBL build great constructions that are not only based on linear amplitude characteristics, but also on the concept of frequency division and impulse response of the entire speaker.
  12. LSPhil

    Multi-Channel, Multi-Amplifier Audio System Using Software Crossover and Multichannel-DAC

    Thank you for your swift and precise response, delivered in just 600 words and accompanied by 30 references. Your approach focuses on striving for a linear amplitude response, whereas I, as usual, tend to design systems based on the principles of Linkwitz, Butterworth, or Bessel. Well, everyone...
  13. LSPhil

    Multi-Channel, Multi-Amplifier Audio System Using Software Crossover and Multichannel-DAC

    From the diagram, I can identify an active LR2 filter, or in other words, a second-order filter with a Q factor of 0.5. After that, there seems to be a first-order Butterworth filter (though the exact frequency is unclear). I assume the passive crossover from Yamaha is not present, and finally...
  14. LSPhil

    Multi-Channel, Multi-Amplifier Audio System Using Software Crossover and Multichannel-DAC

    Hello, congratulations on such an impressive and complex audio system, as well as on your precise description (122.000 words). I would like to ask about the acoustic principles behind your crossover design. Specifically, which type of acoustic filter did you use in the design of your four-way...
  15. LSPhil

    Mod input sensitivity TPA3255

    If you want to increase the output voltage of DSP, then use the HSQ Equalizer from 10Hz q=1 +7,? dB I tried it on my miniDSP and it works.
  16. LSPhil

    Mod input sensitivity TPA3255

    so you claim that there is a -6.8dB missing in his amplifier? That would mean he only makes 27W per channel. Are you sure?
  17. LSPhil

    Mod input sensitivity TPA3255

    Additional question: What is the rated power of the 36V power supply? It should have a minimum of 300W.
  18. LSPhil

    Mod input sensitivity TPA3255

    Don’t do anything, as that’s how it’s meant to be. The difference between 36V and 24V is only 3.5dB, so you won’t notice any significant increase in loudness. These are the laws of electrical engineering. Take a look at the technical data for the TPA3255 and the graph. Similarly, the difference...
  19. LSPhil

    Apparent power consumption of whole audio system during daily audio listening sessions: how SDGs-friendly is it? (not the idle power, please.)

    Out of curiosity, I glanced at my energy meter in the hallway and noted a reading of 27W, with an additional 2-3W for the music. My setup includes a Denon PMA 300V from 1986, operating in deep Class B, which is why it doesn’t consume much energy. It powers an Audax HM130Z10 and TW025A20Mg via a...
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