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  1. Coach_Kaarlo

    Revel F208 Tower Speaker Review

    To all those telling you a single AHB2 is enough to drive the F208's I would say listen to this; https://www.audiosciencereview.com/forum/index.php?threads/ahb2-mono-v-stereo-what-is-audible.21864/post-726184 If you do not hear the difference continue with one amp in stereo. And maybe get your...
  2. Coach_Kaarlo

    Review and Measurements of Benchmark AHB2 Amp

    Not to mention that very little performance is measured in bridged mono, ironically where many AHB2 owners actually use the amplifier.
  3. Coach_Kaarlo

    Simulation Analysis - Screws in Waveguide

    The Yamaha NS-5000 has some interesting design features which have been developed using similar software tools and processes (in my understanding). And Yamaha has access to far more in-house resources than many other audio manufacturers @René - Acculution.com what is your view of some of these...
  4. Coach_Kaarlo

    802 D3 vs Revel Salon 2

    And here we have it. One. Just one. One easily recorded measurement being used as representative justification for the entire sound profile of a speaker. If this is the best we can to contribute to inform others regarding the differences between Salon 2's and B&W 80x Dn's then let's just start...
  5. Coach_Kaarlo

    AHB2 Mono v Stereo - what is audible?

    Will do for sure.
  6. Coach_Kaarlo

    Revel F328Be Speaker Review

    There is a familiar response (dare I say standard response) being proposed here. If an amplifier does not clip the sound quality is not affected because it must be operating linearly. I have a simple experiment, link below...
  7. Coach_Kaarlo

    How Do I Keep My Apartment Neighbor From Hearing My Subwoofer?

    What are the wall and floor constructed from? How many windows? Are the neighbours above, below, adjacent? Anecdote - My old apartment had a rubber layer between top of slab and terrazzo tiled floor. Listened regularly above 90 dB and never had a complaint from any of the neighbours, presume...
  8. Coach_Kaarlo

    AHB2 Mono v Stereo - what is audible?

    Thanks for the advice - gratefully received - will purchase a meter so I can set levels with voltage (ambient SPL near an airport turns out to be much less accurate). Also interested to see what you hear.
  9. Coach_Kaarlo

    AHB2 Mono v Stereo - what is audible?

    Done on a different day with mYphone - but the highs that are in the track are there... https://drive.google.com/file/d/1ip374HfzKXzwQtkOfFSY0v22sw2vKJaL/view?usp=sharing Will hunt for the original. Youtube:
  10. Coach_Kaarlo

    AHB2 Mono v Stereo - what is audible?

    Re tweeters and the tonality of the recording, here is an on-axis measurement the same afternoon I made the recording. Highs seem good on the axial measurements, I think what we hear is the lack of reflections, and the off axis sound drops away so much at the LP. The tonality compared to...
  11. Coach_Kaarlo

    AHB2 Mono v Stereo - what is audible?

    Not sure of the top of my head - std DAC2-HGC output - jumpers unchanged from factory.
  12. Coach_Kaarlo

    AHB2 Mono v Stereo - what is audible?

    Ran them both with the switch all the way down - as per Benchmark. But your advice was good - they sound much better with the middle setting. Will wait awhile before confirming or denying the result.
  13. Coach_Kaarlo

    AHB2 Mono v Stereo - what is audible?

    I matched the levels (aiming for 90dB) with REW each time before recording, however I live in a penthouse apartment with a large external uncovered balcony, which means some background noise. That is the only reason I can think of why the recording levels differ. However based on John's feedback...
  14. Coach_Kaarlo

    AHB2 Mono v Stereo - what is audible?

    Thanks @restorer-john , clearly I am operating out of my area of competence. I think I set levels when something was noisy in the background, then recorded when it was not....perhaps....hard to explain such a big difference otherwise.
  15. Coach_Kaarlo

    AHB2 Mono v Stereo - what is audible?

    Dogma is not being able to consider rational alternatives. Rationally if only a few people can hear a difference no big deal, carry on. However, if a large portion of listeners hear the same difference then we can start the science.....blind tests etc......because there may be some basis to the...
  16. Coach_Kaarlo

    Speaker Testing: why mono is better

    Dogma in the broad sense is any belief held unquestioningly and with undefended certainty. It may be in the form of an official system of principles or doctrines of a religion, such as Roman Catholicism, Judaism, or Protestantism,[1] as well as the positions of a philosopher or of a...
  17. Coach_Kaarlo

    Speaker Testing: why mono is better

    Thank you for your post. I cannot agree more.
  18. Coach_Kaarlo

    Speaker Testing: why mono is better

    FYI Terminals are handed (inside corners of speakers), as are the speakers (marked left and right), and the manual even illustrates correct handedness. Right hand speaker has tweeter outset, mid driver inset, left speaker is opposite. Swapping them changes the image and space in stereo...
  19. Coach_Kaarlo

    Speaker Testing: why mono is better

    Is it the left or the right speaker shown? (they are obviously mirrored). Glad you can however read the text on the speaker - but that wasn't my question ; ) Further away from the speaker the more the testing room becomes involved right? And would the drivers sum on axis or would it be slightly...
  20. Coach_Kaarlo

    Speaker Testing: why mono is better

    I am using a unicorn of a speaker to make what is essentially a pointless point - we do not know what we do not know. So how would @amirm review my speaker/s - in mono? They are handed by design. Where would he sit or measure? Left of centre or right? Or both? I have measured them - it...
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