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  1. #1
    Junior Member
    Join Date
    Mar 2021
    Location
    Ireland
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    2

    Building a listening room

    Hello,

    I want to have a go at making and selling boutique speakers, so I'm going to build a listening room. I wanted to ask the knowledgable people here for advice.

    The goal is to have a room which will allow for the clearest evaluation of speakers. To this end I want the walls to be reflective, but for there not to be any issues with the sound which would mask the sound quality.

    The internal dimensions in feet are 14x22.5x36.5
    The walls and floor will be concrete.
    I'm thinking the roof could just be galvanised sheets.

    My question is; how can I get a good in room frequency response, i.e. not too rolled off at the top end.

    This needs to be cost effective and non-resonant.

    Maybe Plywood over the concrete would even the response, and then the right paint over that might improve matters further.

    Any thoughts?

  2. #2
    Senior Member
    Join Date
    Aug 2014
    Location
    lachen / sz
    Posts
    664

    Re: Building a listening room

    hi and welcome!
    are you planing on becoming a manufacture?

  3. #3
    Senior Member
    Join Date
    Jul 2013
    Location
    Florida
    Posts
    3,157

    Re: Building a listening room

    Welcome to AS Emmett!
    _______________

    Mike

  4. #4

    Re: Building a listening room

    Quote Originally Posted by Emmett Scully View Post
    Hello,

    I want to have a go at making and selling boutique speakers, so I'm going to build a listening room. I wanted to ask the knowledgable people here for advice.

    The goal is to have a room which will allow for the clearest evaluation of speakers. To this end I want the walls to be reflective, but for there not to be any issues with the sound which would mask the sound quality.

    The internal dimensions in feet are 14x22.5x36.5
    The walls and floor will be concrete.
    I'm thinking the roof could just be galvanised sheets.

    My question is; how can I get a good in room frequency response, i.e. not too rolled off at the top end.

    This needs to be cost effective and non-resonant.

    Maybe Plywood over the concrete would even the response, and then the right paint over that might improve matters further.

    Any thoughts?
    My advice is that you talk to professionals and/or companies that specialize in acoustics. Otherwise you are likely to get a whole bunch of opinions here (some contradictory I'm sure) from well intentioned folks who are not experts in the field.

  5. #5
    Member
    Join Date
    Jun 2019
    Location
    USA
    Posts
    73

    Re: Building a listening room

    Do you need it for listening or measuring purposes ?


    Sent from my iPhone using Tapatalk

  6. #6
    Senior Member
    Join Date
    Aug 2016
    Location
    Denmark
    Posts
    535

    Re: Building a listening room

    Welcome to the Forum
    Flemming

  7. #7
    Senior Member
    Join Date
    Aug 2013
    Location
    Singapore
    Posts
    963

    Re: Building a listening room

    A very warm welcome to Audioshark Emmett.

    A great sounding audio room takes quite a commitment in terms of time and money. I know this to be true because I’ve built a couple of audio rooms and written about the experience here.

    The good news is you are starting with a space of almost 11500 cubic feet in volume – which is great. Large spaces are much easier to work with as they naturally have a flatter low frequency response.

    The challenge with audio rooms is rarely rolled off top ends. More usually the challenges are at low frequencies and based on your room dimensions I’m picking you will have a bump at 75-80Hz where clubbing of room modes occur.

    However, given the concrete walls and floors, you are dealing with a highly reflective space and untreated reflections (especially early ones) can muddy the sound. Clap your hands in the room and you will hear flutter echo as soundwaves bounce back and forth between parallel untreated surfaces. The longer the sound lingers the more critical the need for acoustic treatments.

    That said, not all reflections are bad. A judgement needs to be made. Because of this I tend to agree with Nicoff’s advice – talk to professionals in the field. In the finish you need a room that promotes the quality of your speakers – not the deficiencies of the room.
    Borresen Acoustics Loudspeakers, Borresen Model 01 Compact monitor loudspeakers with Ansuz Darkz T2s Supreme resonance control, Audio Video Manufaktur GmbH (AVM) Inspiration amplifier & streamer, Innuos Zen MKII music server, Ansuz Acoustics cables & accessories. Please visit my system thread hosted on Audioshark for more details. Disclosure: The author is materially connected to Ansuz, Aavik & Borresen Acoustics via friendship with an owner.

  8. #8
    Junior Member
    Join Date
    Mar 2021
    Location
    Ireland
    Posts
    2

    Re: Building a listening room

    Thanks Kiwi. I don't think there will be early reflections given that the speakers will be 6 feet from the side walls.

    What do you think about the high frequency response of concrete?

  9. #9
    Senior Member
    Join Date
    Aug 2014
    Location
    lachen / sz
    Posts
    664

    Re: Building a listening room

    depends on the structure of it.

    however, with respect, you will have a hard and long time becoming a sucsessful speaker manufacture.

  10. #10
    Member
    Join Date
    Mar 2021
    Location
    Oregon
    Posts
    38

    Re: Building a listening room

    Quote Originally Posted by Emmett Scully View Post
    Hello,

    I want to have a go at making and selling boutique speakers, so I'm going to build a listening room. I wanted to ask the knowledgable people here for advice.

    The goal is to have a room which will allow for the clearest evaluation of speakers. To this end I want the walls to be reflective, but for there not to be any issues with the sound which would mask the sound quality.

    The internal dimensions in feet are 14x22.5x36.5
    The walls and floor will be concrete.
    I'm thinking the roof could just be galvanised sheets.

    My question is; how can I get a good in room frequency response, i.e. not too rolled off at the top end.

    This needs to be cost effective and non-resonant.

    Maybe Plywood over the concrete would even the response, and then the right paint over that might improve matters further.

    Any thoughts?
    Wow, that would be a very nice sized room to work with. The clearest evaluation potential for speakers in any given room is to ensure the speakers are positioned in AN optimal and preferrably THE location within the room. This is how speakers are tuned acoustically to a given room. By dialing them in acoustically which comes by finding the ideal position.

    If/when this happens your speakers bass will transform from an average bass into a superior / musical bass few seem aware of. Moreover, at the time a few other ancillary benefits wil to light including a significantly more balanced and warm presentation and with not just more pronounced, impacting, deeper, and more well-defined bass, but you should also hear more bass notes that were inaudible when the speakers were placed in an inferior position.

    It's not easy finding an optimal or the optimal speaker location and in fact it can be perhaps the most difficult thing to accomplish in high-end audio. In one room it took me 9 months of moving the speakers around 1/2 inch here or there before finding it. But bear in mind I was only moving the speakers a few times each week. But I'm convinced every speaker / room combination has an ideal location for acoustically tuning them and for the diligent types, they will find it eventually. And if you do, it's pretty incredible to listen to with every listening session.

    The best news is it's free and does not require any custom room acoustic treatments whatsoever. All one needs is a reasonble room and by that I would include:

    - a solid flooring system. Concrete is excellent. If any sub-flooring goes on top of the concrete it should not be free floating but anchored or glued to the concrete.

    - wall-to-wall carpet and pad.

    - a minimum amount of carefully chosen chairs, sofa's, ottomans, etc.

    - some artwork on the walls preferably without reflective surfaces but no big deal if they do.

    - with a room that size I would definitely consider a few smaller trees purely for aesthetics perhaps at the front wall behind the speakers, etc.

    But that's really about it. Besides most of your time will be spent trying to find the optimal speaker positions anyway.
    "The more I dabble with extreme forms of electrical mgmt and extreme forms of vibration mgmt, the more I’m convinced it’s all just variations of managing mechanical energy. Or was it all just variations of managing electrical energy? No, it’s all just variations of managing mechanical energy. No, wait. It's all just variations of managing electrical energy" -me

  11. #11
    Senior Member
    Join Date
    Mar 2014
    Location
    Palm Coast, FL 'The Hammock'
    Posts
    4,515

    Re: Building a listening room

    Sounds like you have a plan.
    PassXa-30.5, W4S STP, Kef 201/2, KEF 140, Vapor Breeze, Lumin, Bryston CD, BHA-1, HD650, HD800s, Dan Clark 1.1, OPPO 203, 105.

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Building a listening room

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