Recent content by dhai

  1. dhai

    MSO-like EQ optimization

    MSOptimizing works in rooms with dimensions in the range of the wavelengths of the sound. At higher frequencies wavelengths are much smaller than room dimensions, hence the amplitude and phase tricks of MSO do not work any more. It is much easier to treat the room acoustically at higher frequencies.
  2. dhai

    Hearing loss and DACs

    Hello Mr. AJ, please excuse my lacking English vocabulary, I'm natively German speaking. And thank you, followed such and similar debates for a while. Coming from a family of string players, your strad link is interesting. Read even some where carbon based vioins were rated better than wooden...
  3. dhai

    Hearing loss and DACs

    I respect measurements and their explanation (thank you for the link, ddude003), received formal training at university, designed and use test gear daily for loudspeaker development and room acoustics evaluation. But I am also frustrated by the fact that measured results do not tell the whole...
  4. dhai

    Hearing loss and DACs

    I would also suggest to try a "better" dac yourself. Give it a few days of warmup, and several listening sessions to "average" varying mood. A tinnitus is different from HF hearing loss, creating IMD even at low level listening, and very annoying at higher levels. HF hearing loss is easier to...
  5. dhai

    Topping balanced PA5 amplifier

    Thank you, dsnyder0cnn. Nice to watch different perspectives in all things audio. I will continue looking over your shoulders upon AV, and comment if applicable (not into video, using an old Pioneer plasma - not even full HD). I really appreciate the calm and friendly vibe!
  6. dhai

    Topping balanced PA5 amplifier

    I have heard several amps with low measured HD/IMD specs that sounded constrained with complex signals, or were grainy or clearly less transparent than others, and therefore concluded that specs don't tell the whole story. The resolution of TAD 2002 HF and proprietary midrange drivers is good...
  7. dhai

    Topping balanced PA5 amplifier

    Agreed, the Sugden may have higher steady state distortion than the Topping. It seems to sound "warmer". No, it's not what I am used to hearing. I use many amplifiers and systems to check my loudspeakers with (speaker manufacturing and room acoustics is what I'm living from). Some, like the Job...
  8. dhai

    Topping balanced PA5 amplifier

    Thanks for your responses, I'll try to run the dac less hot and will report by weeks end. The PA5 input should not be a problem at less than 10W peak output to the horns, if attenuation is done by passive input potentiometer. Have no circuit description. Finally a mix with Dac4 into PA5 is...
  9. dhai

    Topping balanced PA5 amplifier

    I bought the E50 Dac + PA5 Amp + TCT1 cable set, to find out if current "audio science" is a valid lead for me ;) Burning in was 10 weeks of 250GB mixed music from SD card player. Intermediate listening impressions changed from really bad after arrival to acceptable but strange to impressive...
  10. dhai

    What Do I Need?

    I experienced flawless reproduction of 44.1-192 kHz 16/24 bit pcm, no higher density nor dsd tried. SD card only, and BT by my son, also nice and responsive. Ditto BT remote control via HiBy app. Sorry, I don't want my PCs to eat another driver to try that. If I find time to test HD playback...
  11. dhai

    What Do I Need?

    I have an SMSL SD-9 (5 months in use, max 256 GB SD cards, unfortunately) and it works fine, faster reacting than my other "burn-in source", a Soundaware A1 (15 months in use). Sometimes used for file listening, also nice, probably less impressive than higher standard audio PCs (dual JPLay setup...
  12. dhai

    Listening Tests and how length of time spent listening alters perception ex.

    Added to this, when you stop your car and continue listening - suddenly bass is back, previously hidden under vehicle noise.
  13. dhai

    Acoustic Panel at 1st reflection point

    Sonnie, I got your point after DanDan's remark: comparing diffusion with absorbtion, not diffusion with specular reflection. And of course there will remain more energy in the ETC. But good combinations of absorbtion plus diffusion (I call it abfusion) will attenuate and diffuse this energy over...
  14. dhai

    Acoustic Panel at 1st reflection point

    Yes, about 4 times the power is what it seems to take - so closer to 6 than 3 dB. One recent experience, with absorbtion down to the lowest octave: https://www.lewitt-audio.com/blog/LEWITT-recording-studio Even if it is based on abfusion - not purely absorbtive ! - with some residual...
  15. dhai

    Acoustic Panel at 1st reflection point

    Thank you, DanDan, makes sense. Constructing horn loudspeakers, I've some experience with direct sound ... even within diffractive environments :) What shocks me every time in dominantly absorbing studios, is the amount of energy consumed. Amps and speakers struggle hard to produce convincing...
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