"This Harbeth User Group (HUG) is the Manufacturer's own managed forum dedicated to natural sound from microphone to ear, achievable by recognising and controlling the numerous confounding variables that exist along the audio chain. The Harbeth designer's objective is to make loudspeakers that contribute little of themselves to the music passing through them.

Identifying system components for their sonic neutrality should logically proceed from the interpretation and analysis of their technical, objective performance. Deviations from a flat frequency response at any point along the signal chain from microphone to ear is likely to give an audible sonic personality to the system at your ear; this includes the significant contribution of the listening room itself. To accurately reproduce the recorded sound as Harbeth speakers are designed to do, you would be best advised to select system components (sources, electronics, cables and so on) that do not color the sound before it reaches the speakers.

For example, the design of and interaction between the hifi amplifier and its speaker load can and will alter the sound balance of what you hear. This may or may not be what you wish to achieve, but any deviation from a flat response is a step away from a truly neutral system. HUG has extensively discussed amplifiers and the methods for seeking the most objectively neutral among a plethora of product choices.

HUG specialises in making complex technical matters simple to understand, getting at the repeatable facts in a post-truth environment where objectivity is increasingly ridiculed. With our heritage of natural sound and pragmatic design, HUG is not the best place to discuss non-Harbeth audio components selected, knowingly or not, to introduce a significantly personalised system sound. For that you should do your own research and above all, make the effort to visit an Authorised Dealer and listen to your music at your loudness on your loudspeakers through the various offerings there. There is really no on-line substitute for time invested in a dealer's showroom because 'tuning' your system to taste is such a highly personal matter. Our overall objective here is to empower readers to make the factually best procurement decisions in the interests of lifelike music at home.

Please consider carefully how much you should rely upon and be influenced by the subjective opinions of strangers. Their hearing acuity and taste will be different to yours, as will be their motives and budget, their listening distance, loudness and room treatment, not necessarily leading to appropriate equipment selection and listening satisfaction for you. Always keep in mind that without basic test equipment, subjective opinions will reign unchallenged. With test equipment, universal facts and truths are exposed.

If some of the science behind faithfully reproducing the sound intended by the composer, score, conductor and musicians over Harbeth speakers is your thing, this forum has been helping with that since 2006. If you just want to share your opinions and photos with others then the unrelated Harbeth Speakers Facebook page may be for you. Either way, welcome to the world of Harbeth!"

Feb. 2018
See more
See less

Room Equalization with DIRAC

  • Filter
  • Time
  • Show
Clear All
new posts

  • Room Equalization with DIRAC


    Has anyone used Dirac as room equalization ? (through a Mini DSP or with a MAC/PC). I'd be interested to see your results or your target curves. I don't know if posting graphs here is permitted as it might be interpreted inappropriately. I've read here that some consider a flat target curve as desirable, at least in the LF at the listening position. But I have found information elsewhere that a slightly decreasing curve towards HF is preferable to a flat one (I should mention at the listening position). Until now, I have a flat curve for LF and I follow the speakers response for HF. But I'd be interested to have your views.

    Thank you

  • #2
    We used DIRAC at the Bristol show, 2015? You'll find a discussion here on HUG.
    Alan A. Shaw
    Designer, owner
    Harbeth Audio UK


    • #3
      If I remember correctly, it was Dirac through a Mac/PC, rather than Mini-DSP, and the gist of Alan's comment was that it's a great tool, but so powerful (and with so many variables to adjust) that a novice user might find it hard to make good use of it.

      That's from memory - because I couldn't actually locate the discussion thread on HUG. I searched by using the 'Advanced Search' function and putting the word "Dirac" in the "Keywords" box. That produced only the two posts immediately above. Thinking that the search might be time-delimited, I entered the date range January 1, 2015 - present, and got no better results. And when I performed similar searches for "Bristol," nothing came back related to Bristol 2015 (even thought I know there was substantial discussion at the time, as Alan indicates). Not sure if this is a flaw with the user (me) or the "Search" function on HUG.

      By the way, I've been intrigued by the Mini-DSP Dirac system, too (as well as other room equalization systems), but that is a project that will have to stay on "hold" until another day.


      • #4
        Indeed, the search function does not work very succesfully. Searching from outside, using Google, is far more effective. As for room equalization, I have been a very happy user of the Antimode 8033 unit to equalize my subwoofer. The advantage is that it is very easy to use. The limitation is that it only equalizes the subwoofer. On the other hand, from what I read, it is precisely the lowest frequencies that need equalization the most, and that room equalization becomes more and more listening position specific the higher the frequency.


        • #5
          I think the discussion about Dirac at the Bristol show is here :


          • #6
            Interesting document that Dirac provided me about the target curve.