Blog Forums Car Audio with Livin’ Loud with Andy Opinions Needed – Easiest Mistakes in Audio to make?

last updated by imcokeman 1 year ago
5 voices
5 replies
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    • #14631
      123toid
      Keymaster

      Alright guys a new Sound Advice is coming up this week.  We will be talking about the easiest mistakes to make in audio.  This can be car audio or home audio.  We already have some ideas, but I want to hear from you.  Anything you think we should talk about?

      If you answer, we might just share it live and give you credit. What ya got? 


    • #14639
      Chedwin
      Participant

      @123toid Id say wiring drivers or even entire cabinets polarity flipped causing horrible phase issues that can be really hard to track down in large multi channel setups


      Josh Evans, Professional Live Sound Engineer, High End Commercial AV Install Technician
    • #14645
      tvor-ceasar
      Moderator

      Not reading the manuals or looking up how your piece of gear works and what the settings mean / do and how they are meant to be hooked up.

       

      Going for the “Hi End Esoteric” stuff while your equipment itself is incapable of realizing any benefit. Such as going for $1000 speaker cables when you have 45 year old original mid-grade “name” speakers. While you may love them, that $1000 could buy some much more revealing and articulate speakers today, along with some fresh 16 or 14 gauge wire from a big-box store. Or, you could use that $1000 to upgrade the drivers and crossover in the original speakers for better sound in retro cabinets.


    • #14646
      AJC
      Participant

      @123Toid – so far we have:

      1) Wiring and polarity

      1.1) solutions

      1.1.1) Battery testing a driver before install

      1.1.2) DSPs with phase inversion switches

      1.1.3) Need a calibrated mic at times to see the drop at the crossover point due to phase cancellation (more a diagnosis issue)

      2) Efficient spending of capital on assets (buying the right things to maximize one’s enjoyment)

      2.1) information vs chasing a dream

       

      As for my suggestions on easy mistakes:

      3) port length and box sizes (or people thinking they can make a small box, but with a large port which winds up making the box size larger than people expected)

      4) To stuff, to line, or to go raw – when to and how to use insulation in boxes

      4.1) some see the 100% fill and 50% fill from the LDC and other sources. There is also questions on what to use for insulation, looking for cheap foam alternatives to use (like memory foam bed toppers), and how much should be used (meaning just line everything, just the walls, effect if you insulate too close to the port changing the effects of a port, etc., or to try to fill the center of the cavity)

      5) Weights and Passive Radiator design

      6) How to brace

      7) thinking you can add insulation after the fact (not accounting for changes in air volume)

      8) Resistance – from amp to speaker, not properly accounting for loudspeaker Ohm rating or over working your amplifier; or under-powering a high Ohm speaker

      9) balancing sensitivity – how to bring down (a resistor) a tweeter to match the sensitivity of a woofer; effects of using that resistor on powering the speaker as a whole; making sure you won’t overpower that resistor

      10) thinking DSP can fix a bad box design or fix poor quality speakers, resonance, notches in frequency response, etc.

      11) other phase issues not related to polarity – distances and wavelengths, spacing, comb effects, etc.

      12) trying to do too much per project (biting off more than one can chew)

      12.1) this is more a general suggestion to get one’s feet wet and try to build boxes with only one or a couple new elements so that a person can better understand the process, what is happening with the variables selected, etc. It also is so that people do not feel overwhelmed at having to learn multiple aspects of speaker and acoustic theory, or even electrical engineering aspects, at the same time. A hobby isn’t a short race, it’s marathon. You have time to mature and learn more as you go. Don’t try to rush learning, because learning takes time. Just pick up a book and read. Learn until more comfortable on concepts. Even remember to look for white papers and papers in journals for theory. No one knows everything. But anything can be learned with time and patience.

      13) for car audio – trying to pull too much power off of a stock alternator

      14) damping of doors and other treatments for cars

    • #14651
      123toid
      Keymaster

      @ajc9988 I think you read my mind.  Almost all of these I already had a on a list.  So thankful to see you were thinking along the same lines.  Makes me feel much better about this.  I’ll make sure to give you guys credit in the episode. 


    • #14668
      imcokeman
      Participant

      I know we’re after your episode, but not soldering connections.  Head unit wiring harnesses should be fine twisted together and secured with electrical tape right?  until they aren’t =)

       

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