When you install an aftermarket subwoofer or speakers into your vehicle you want to get as much performance as possible. Unfortunately though there are four things that can easily lead to poor bass response. In this video we talk about how to potentially fix a lack of bass or subwoofer output.

▼ Tools and Materials:
➜ PT-9A Phase Polarity Tester explained in this video: goo.gl/e1foSH

▼ Other important links:
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➜Box Designs, BUILD YOUR OWN BOX! goo.gl/sv1wam
➜Support the making of the Videos: goo.gl/2jMVZ6

Here at Car Audio Fabrication I teach you how to Master Car Audio in an effort to Design, Build, and Install your ideal car audio system. Whether you are a hardcore basshead or a HiFi focused audiophile I would love to have you subscribe and join our community!


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Simple Door Pods [VIDEO] Series: goo.gl/jPpKGB
Custom Sub Box [VIDEO] Series: goo.gl/bzZPwl
Underseat Fiberglass Sub Box [VIDEO] Series: goo.gl/OBbUwH
Fiberglass Door Pods [VIDEO] Series: goo.gl/oAdrx1

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Car Audio Fabrication – Master Car Audio – Design, Build, Install


    • CarAudioFabrication

      Enjoy this video? I also do complete build videos, basic and advanced tutorials, and reviews. Check out other videos on my channel here: https://goo.gl/SyyNfJ

      Thanks for watching!

      about 2 years ago
    • Mudmisfitz.ATV
      Mudmisfitz.ATV In reply to CarAudioFabrication

      Curious if you read comments!! I'm not sure if you have a video like this cuz I know you have certain sponsors and such but I'd like to see a true budget build. I'm considering a cheap under the seat amp built in for my 96 dakota planning on doing something nice in the future but still need to use back seat so I cant have a bid ol bass box any ideas

      about 2 months ago
      ROBERT FRIEND In reply to CarAudioFabrication

      @Eric Prough The signal from your source unit could be at a voltage higher than the amp. The pop is surge current. You need to match the gain so they are the same. DSP is a filter to stop added THD Total Harmonic Distortion. It should not be a problem for subs though if you have full range speakers more THD is added with more circuits. Look it up on youtube and online.

      about 4 months ago
    • Eric Prough
      Eric Prough In reply to CarAudioFabrication

      @ROBERT FRIEND what does dsp mean and what do you mean line level. What caused the problem all i did was switch my amp kept everything else the same.

      about 4 months ago
      ROBERT FRIEND In reply to CarAudioFabrication

      @Eric Prough Your line level is not matched, the output from music source to amp needs line level with dsp output to match the gain. The best thing you can do for now is turn down the volume and gain before switching on or off, you can put a switch between Battery and Amp and switch off amp before switching off the source and amp too. That is how I solve the problem. Get high current anti surge rocker switch or LOC with DSP.
      DSP is a filter not all LOC have it.

      about 4 months ago
    • Eric Prough
      Eric Prough In reply to CarAudioFabrication

      My sub makes a thumping noise when i turn the car off pls help me fix this problem.

      about 4 months ago
    • Mic Dolla
      Mic Dolla

      Thanks for the helpful information and I will continue to follow

      about 1 day ago
    • James Lord
      James Lord

      Thumbs Up!

      about 1 day ago
    • rigjockey67

      Great vid ...like the detailed details

      about 1 day ago
    • naturewins

      Vi el video hasta el final

      about 3 days ago
    • Khang Xiong
      Khang Xiong

      Way too complicated for me. Sounded simple until spaces, dimensions, locations all came into play. I'll just pay you to make my car audio system sound good lol.

      about 4 days ago
    • Jeff Hoffman
      Jeff Hoffman

      I'm a new be but watching and listening to the words of wisdom from you helped me big time .I am hooked on this and thank you for doing what you do and I have watched your videos to the very end every time and will continue to do so most importantly. Your videos have brought me closer to my little brothers and now we talk about car stereo system every day .I have a boat that I want to be heard from space I already have leds so I can be seen from space. I wish you could help me with the system so that could be my number best thing for myself and this helps me with my depression and has helped me deal with drugs that I have been battling my whole life. I'm 53 and drugs use is a problem because of my father taking his life in 1981. Cocaine is the problem and no matter what or who go drugs are everywhere. Music has always made me feel. And the last couple years. Have been hell .the videos you post have given me back some purpose in my life. Drugs have taken everything that made me happy away once I got the stereo fix from your videos. Life is different. It has even made me clean my life. My home. My car and do on thank you so much .. only wish one thing. Please help me with my boat this spring. Unfortunately I live in boring bay City Michigan. Blocks from the Saginaw river. In NA I learned this what are you gonna do when drugs don't work anymore .... Your words and wisdom. Is better then any drug I have ever done. That's the truth. Thanks and I sure hope you read my story. I would feel again I don't have feelings anymore .the only thing I do love is water. And u don't want to lose that. Like everything else in my life

      about 4 days ago
    • High Shaun
      High Shaun

      Just put the speakers & sub next to each other in the front, keep it simple. No need to worry about frequency delays. ( or all in the rear, or on sides) unless you require some insane sub woofer.

      about 4 days ago
    • LeRoy Ness
      LeRoy Ness

      So I have two 10” hurtz subs that can handle 1200W and I’m running a JL Audio 5xd amp and I wanna know if I am hurting my subs or hurting my amp

      about 9 days ago
    • LeRoy Ness
      LeRoy Ness In reply to LeRoy Ness

      All I know is that they r hurtz

      about 8 hours ago
    • Richard Hilll
      Richard Hilll In reply to LeRoy Ness

      LeRoy Ness What model subs are they?

      about 5 days ago
    • Prashanth Mascarenhas
      Prashanth Mascarenhas

      Sir...I want a information about a phase tester....

      about 10 days ago
    • Daniel Simpson
      Daniel Simpson

      Hi, ive fitted a subwoofer and amplifier in my car yesterday all working fine for the first 10 mins then it started bassing out when even when i turn the volume to 0 the sub is still producing bass crakleing and thumping, ive tryed many solutions and still getting no where.

      Can any 1 help me solve this issue please.

      about 13 days ago
    • Lars van Driel
      Lars van Driel In reply to Daniel Simpson

      Feel the subwoofer driver and very slowly and carefully push the cone in on the opposing sides. Are there any rubbing or scratching sounds? Had a similair issue, maybe you configured you're amp incorrectly. Look up how to check if a subwoofer is blown on YouTube.

      about 10 days ago
    • Neil Enzo
      Neil Enzo

      Very helpful. Thankyou mate ✌

      about 15 days ago
    • Old Яomans
      Old Яomans

      some sample, "More Bass"

      about 17 days ago
    • Lil CreamPie
      Lil CreamPie

      I have a 2500w amp powering 2 12inch 500w subs and 2 500w mid frequency speakers and the bass is honestly shit and the setup is like 5years old or something and when it looses power it goes good then you turn it up 2 more it instantly looses power and goes weak is it my amp or subs or amp tune edit: and btw it's a Ute the 12in subs are both slim lines

      about 17 days ago
    • MeatPopsycle

      Your videos are generally pretty easy to sit through in their entirety.

      about 22 days ago
    • Kruz Malo
      Kruz Malo

      Y when I got the volume half way and then when I turn the bass knob to hear the bass the bass hits but then it gets tuck then I have to turn off the radio

      about 24 days ago
    • Rich Moore
      Rich Moore

      Excellent thank you!

      about 1 month ago
    • Alberto Cross
      Alberto Cross

      Is a digital sound processor necessary?

      about 1 month ago
    • Nathan Shinder
      Nathan Shinder

      This is nice- but skips over the idea that enclosures ('boxes') for bass have to be very well designed, or they won't work very well, or at least suck up a lot of power. Manufacturer recommendations are a good place to start. To really get into it- there are programs and charts and formulas. Mainly, these are concerned with box volume, port area, port length. These derive from the 'driver parameters'. These are complicated electromechanical measurements, called 'equivalent volume' (compliance), Driver Q, and the simpler Fs (resonant frequency), and others. To make a speaker that is 'theoretically' the best that the driver can yield, you'll have to do a lot of work, and this makes a bass reflex that has a nearly flat response to cutoff (-3db, if memory serves.) BUT- we live in the real world. Whereas I, myself, might like a speaker that would get under 20HZ audibly, people might prefer actual units that have a big 'hump' at 30HZ (Or other). There is no right or wrong on this. Many old home speakers (JBL) had a big bass hump, but not flat response. In very broad, general terms, magnet size runs as the inverse of box size. For the same voltage (RMS) larger magnets are inclined to give larger force- over a shorter throw (?) What happens? The port action in these is greater than the sound pressure from the cone. There is so much more pressure in these small boxes. Doubters can check the performance, for example of those Carver units, that used 8" drivers, with passive radiators, in a box less than 1ft3.

      about 1 month ago
    • Mylo Fryett
      Mylo Fryett

      I have a cheap speaker tower great booming bass

      about 1 month ago
    • John Yount
      John Yount

      U cam also use deep cycle batteries

      about 1 month ago
    • jjschwartzkopf

      Not only did I make it to the end, I loved every second of your explainations. I am a 40 year old confessed basshead. I had multiple "systems" in my teens and early 20s. I made a lot of mistakes then and after 20 years of missing that chest pounding bass I am planning to have a bit of a 'mid-life crisis and reinstall some window cracking thump. However, this time I will do it right and your videos are extremely helpful in my journey. BTW I am thinking of starting with a single 12" sundown nsv4 (properly boxed and powered) to start. I think that should be enough.

      about 1 month ago
    • mike Etter II
      mike Etter II

      I made it to the end of the video

      about 1 month ago
    • mohamed magdy
      mohamed magdy

      hello , i have a question , iam running 2 kenwood speakers 650W peak @ 115 RMS per each , and in my front doors i have a pair of weak kenwood KFC 210W peak running @ 25 RMS , my head unit says it powers (50X4) , i need an advice on buying an amplifier , does it do anything to this system ??? how much power i need off the amp , iam thinking of replacing my already new door speakers to something somewhere around 80 RMS per channel thank u

      about 1 month ago
    • jesus lozano
      jesus lozano

      How can you get rid of the v8 sound in the speakers? Which transfers to the subwoofers and the rear back up sensors and oncoming traffic been so loud in my door speakers? The shop I took my truck didn’t do a good job and they can figure it out, they told me I have no choice or go back to factory... I’m keeping the my ford touch head unit, but upgraded to JL audio all around and I feel like the 6,000 dollars in system going to the garbage, please help?

      about 1 month ago
    • jackie graham
      jackie graham

      What do you mean how many really make it to the end of your videos he'll I lesson to them over and over til I feel I got it thank you so much

      about 1 month ago
    • southsidemikevlogs

      how do you tune your system for all kinds of music tuning it at 40hz u cant play bass boosted music so i am looking for away to tune it for all that much and real hard hitting bass

      about 1 month ago
    • kiko cañete
      kiko cañete

      I did!

      about 1 month ago
    • Shawn Miller
      Shawn Miller

      I didn’t have that cool device to check polarity. When I was working as an installer, we had a 9 volt battery with leads coming off of it red/white. Place the leads on what you think is +/- and if the speaker pops down, polarity is backwards. If it pops up first, you are good to go. I was an installer back in the 90’s so things have changed since then but if you are in a pinch, this will work and save you some money.

      about 1 month ago
    • Lunarwolf Gaming
      Lunarwolf Gaming

      What is the difference between in subs rated for different resistances, I.E. a 4-ohm DVC and a 2-ohm DVC. I've scoured Google and haven't found a crystal clear answer and your videos have always been explained in a way that is easy for me to understand. I was wondering if you had time to make a video on the subject. Thanks for your time, you're an awesome channel to watch since I've gotten into car audio, keep it up Mark.

      about 1 month ago