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:
➜FREE weekly training program: goo.gl/5T4D7v
➜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!


Early Access to Videos, Secret Videos, Direct Messaging for Questions:
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Website: www.caraudiofabrication.com/
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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 1 year ago
      ROBERT FRIEND In reply to CarAudioFabrication

      How do I stop my Pioneer iB Flat polycarbonate vibrating the plastic flat face. It does not seem thick enough. Could the problem be a small port. The port is 1 1/2 inch and the speaker is 8" 150 WRMS and the enclosure is built with 18mm Chip and is 7.5" D X 9" W X 16" H. Am I pushing the speaker too hard and expecting too much from this small driver? I can not seem to balance the output for all tunes, I will probably get something bigger. When it is loud and vibrant it rattles and when it is low and smooth I do not get enough bass to balance with the mids and highs.

      about 1 month ago
    • Steven Hess
      Steven Hess In reply to CarAudioFabrication

      I need to hire you guys

      about 5 months ago
    • Diego Vargas
      Diego Vargas In reply to CarAudioFabrication

      Can swapping polarity blow a woofer or speaker

      about 7 months ago
    • moneygold3
      moneygold3 In reply to CarAudioFabrication

      CarAudioFabrication This Video was a Big Help 💯💯💯💯💯💯

      about 9 months ago
    • susyyy yyy
      susyyy yyy In reply to CarAudioFabrication

      you can just draw a graph

      about 9 months ago
    • James Bower
      James Bower

      I watch your videos from beginning to end, i know alot, but everyone can learn something new from someone. Verry in depth topics. Im about to put 2 skar vd 12 shallow subs, but are really not lol. Im putting them in a 2003 f250 2 door regular cab behind the seats in 2 prefab 12in atrend bbox truck boxes. Do you think they will sound better than two 12in jbl c series bottom of the line? Just thought id get your opinion

      about 17 hours ago
    • zombieKILLER1871 KILLER1871
      zombieKILLER1871 KILLER1871

      Question I have a mini van cause I am in a wheelchair so easier for me I want to have the most bass as possible should I go with a ported box or non ported box oh I have 2 12inch subs that will be going in on the 16th and I listen to most rap and country

      about 2 days ago
    • Squirrel

      All you “gain” guys n gals, you are not setting the gain of an amplifier. You are setting the input signal attenuation factor. The gain of a particular amplifier is a constant which is set at the time of design. Sorry, just a pet peeve. Shame on the industry for allowing such confusion.

      about 3 days ago
    • Dave C
      Dave C

      Always watch them through mate!
      Compact subs like focal IBUS - 2.0? I drive a Hilux SR5 and I’m looking to integrate this into my cabin.
      Any hints and tips on them?
      Cheers mate.
      Keep up the awesome videos 👌🏼

      about 3 days ago
    • Ryan n Karen .Celaschi
      Ryan n Karen .Celaschi

      I am 46 now, have installed audio systems since 17.
      These videos are great. Not only learning more they remind me of things I have forgotten

      about 9 days ago
    • Brett Ware
      Brett Ware

      Great video. I watched the entire vid too. 😂😂😂 I tell everyone about your channel that is looking to upgrade their ICE.

      about 9 days ago
    • Brent Fisher
      Brent Fisher

      Not 4 mistakes, but two words: Cassette Tape. Cassette tapes hold bass the way a Styrofoam cup holds gasoline.

      about 11 days ago
    • fr0zeN
      fr0zeN In reply to Brent Fisher

      sorry i dont speak english well, what does this mean?

      about 11 days ago
    • msr47gaming

      hey im really new to car audio, and i am planing on getting a good bass for a 91 notch back mustang.
      2: 6x8's in the rear : idk what brand
      2: 6 1/2" for the doors : idk what brand
      2 : 3 1/2" for the dash: again idk what brand
      100 amp alternator
      any recommendations for brands for speakers would be helpful.

      Thank You

      about 12 days ago
    • Andy Kalnins
      Andy Kalnins In reply to msr47gaming

      Depends on how much you’re looking to spend. Focal makes really good speakers but are not cheap. I’ve had two sets of 6.5” components since 2011 and no issues with them. Find an installer who knows how to do “active setup”, which means the mid range speakers and tweeters have separate amplifiers. Huge difference in sound. Also been using the same JL Audio amps since 2002, a 75/4 and 500/1. Never any issues. Always have had professionals install the system in the different cars.

      about 11 days ago
    • Frank Bush
      Frank Bush

      help a noob out please: installing a Boss pt2200 2-ch amp in my mid 90's toyota van to power one Rockville k9 12'' (1000rms sub-rating). Boss claims the amp puts out 1600 rms bridged @4ohms. Wild- unscientific guess here, but I'm thinking the amp might actually put 1000 rms bridged not 1600. this is fine because that's how much power I want on the sub. Do you think my guess might be close? Would it be advisable to get a higher output alternator for this amp? If I do need a beefier alternator, will I need to install heavier wires for it under the hood, or stock connections & wire gauge okay? My stock alternator is 70 amp, and the only aftermarket high-power alternator I've found is 160 amp, so if the answer is yes- i do need a bigger alternator, is that 160amp what i'm looking for? Any guidance is much appreciated! thanks for making some excellent videos!

      about 12 days ago
    • GiggLz Gaming
      GiggLz Gaming

      How do I know what amp to get with subs? Is there a general guide? I want to upgrade my subs but, not sure what amp to get.

      about 15 days ago
    • fr0zeN
      fr0zeN In reply to GiggLz Gaming

      i bought a 1500w amp with my 1500w as ref 12". So if you want to go safe buy the sub and amp with the same wattage

      about 11 days ago
    • Lewbuu

      @caraudiofabrication is it bad to have 2 subs facing one another

      about 15 days ago
    • beejay 1981
      beejay 1981

      U can also use a 9v battery to check the Polarity but I don't know if it's a safe way to check bc I use to use that method back in the day

      about 17 days ago
    • Truth Betold
      Truth Betold

      I used a audiocontrol lc6 for my 2015 civic si so I could sum the 4 channels together off the factory amp so I could get a full range signal to play down into the 20s. I have a Fi Bl in a t line tuned to 30 hz but it still falls flat on its face below 30 hz. I've checked all the wiring and it's good. I've put the box in a blazer with a aftermarket deck and it sounds awesome. Shit pisses me off man

      about 17 days ago
    • Daniel Thornton
      Daniel Thornton

      I watched to the end, cheers mate!

      about 18 days ago
    • Tim Schutte
      Tim Schutte

      , ha ha, I have made this polarity mistake more than once, be careful !!!!!!

      about 19 days ago
    • Kohdies

      I don’t think I need more bass. It already put a big ass crack in my windscreen because of it. All I have is a 1300w pioneer sub with a 1000w amp.

      about 20 days ago
    • Joseph Frazier
      Joseph Frazier

      Bigger the box the more bass carries with a nice beefy port. My power bass xxl was 2 12 on a 5500 dclass amp putting 3500 in a 950 watts 2x subs. I blew out 4 amps and got a 6k dclass and changed the box from the rodeo smaller size. But i like my box 2 take up the trunk with the cone facing the back of the car to push against and the port that point to the back will carry the bass n the car thru a chamber seat i made in the gs430. N she fuck my bumper up. The back tail light screw holes broke. N you can stick u finger n the crack of the trunk

      about 21 day ago
    • Darren Starr
      Darren Starr

      Very good video and absolutely spot on many of these problems people don't think about when building their system acoustic design I've had the same problem I built systems that were very good and then I paid people to do system for me to put 4 12-inch Pioneer subs 1500 Watts RMS each with two Orion D5000 amps Nexus stinger battery and power cap their box design was crap a previously had two 12 running 400 watts that was much louder of push-pull config the actress was completely out of phase and out of sync total waste of time and money inch and a half thick box was hard to get into the vehicle at all let alone to get out make sure the people you get to do your box or system. Knows what they doing and have a track record and Systems you can check out

      about 23 days ago
    • Sandon Adamson
      Sandon Adamson

      Polarity checker? Non one is going to buy one to check that. Just use a AA battery. If it goes out the one on the + of the battery is your + on the speaker.

      about 27 days ago
    • Sandon Adamson
      Sandon Adamson In reply to Sandon Adamson

      +CarAudioFabrication I'm not sure it was presented that way, because it never caused me to think about testing from the source, through any signal processing devices, through the amp, to the speaker. But thinking about it, why would it not work? It would cause a voltage rise from 0 to 90 degrees pretty quickly and stay. Voltage is probably too high, so use a mostly depleted battery and start with the gains turned down. I don't see why there would not be some kind of movement that would indicate polarity. Unless you've actually tried it.

      about 26 days ago
    • CarAudioFabrication
      CarAudioFabrication In reply to Sandon Adamson

      For the thousandth time, an aa battery cannot be connected at the source and tell you if polarity is correct all the way through the signal path. It would only tell you if the terminals are labeled correctly. Real installers understand the vital importance of the tool, and being friends with the guys that sell them I can tell you, people buy them every day.

      about 26 days ago
    • chipete1

      What's the Best way to reglue a sub dust cap?

      about 27 days ago
    • chipete1
      chipete1 In reply to chipete1

      +Nico Rouzparast stfu

      about 27 days ago
    • Nico Rouzparast
      Nico Rouzparast In reply to chipete1

      chipete1 what isn’t the best way to reglue a sub dust cap

      about 27 days ago
    • jeff semrad
      jeff semrad

      Enjoy your videos. Have learned alot from them.

      about 1 month ago
    • Pieter Smuts
      Pieter Smuts

      Made it to the end ; ) It's easy to make it to the end when your videos are so informative and interesting. Thanks man!

      about 1 month ago
    • Turd Peterson
      Turd Peterson

      when i wasnt sure what the polarity was on a speaker, usly factory car speakers that have no labeling, i alwase just used a battery to check polarity, speaker will push out when polarity is correct

      about 1 month ago
    • Matt4:4

      Bandpass always gives the best bass for everyday users. Always point woofers away from front of car. If you do 1 or both youll notice a huge diff immediately

      about 1 month ago
    • George P
      George P

      I dont know if my subs sound like shit because A They're hooked up wrong B Not enough CONSTANT power C encloser is sealed and I ordered ported, but whatever ill change it if its the problem. D The lineout convertor is junk or tuned/wired wrong E theyre 8inch and i expected too much? F MAYBE SKAR AUDIO IS JUST FLAT OUT CRAP?! PLEASE HELP..I have 2 8 inch 800w max 400rms SKAR AUDIO subs in a small sealed box and a soundstream Ti6000dl mono amp with stock nissan maxima electrical components

      about 1 month ago
    • PuertoRicanStyL

      I have a 12 inch JL Audio sub. I listen to mostly heavy metal, and it just doesn't catch the drum bass good. I'm wondering if there's something I can do with the head unit's equalizer or maybe the crossover to make it concentrate more on those higher mid hits.

      Hits the bass in rap music really good, because of it being a digital bass sound vs the bass kick from a drum kit.

      about 1 month ago
    • PuertoRicanStyL
      PuertoRicanStyL In reply to PuertoRicanStyL

      +Aaron Mcclure It's sealed.

      When I checked to see what the hertz was set at, it looked to be around 75. The amps dial can go u to 250, and the sub can go up to 200. I wonder if that would help it focus more on those other notes vs the lower ones if it got raised up some. I didn't want to mess with the dial because I had someone install it. And I don't know if he has other stuff set around that tuning. I'll have to ask him.

      about 1 month ago
    • Aaron Mcclure
      Aaron Mcclure In reply to PuertoRicanStyL

      Do you have a ported box? Sealed is generally better for metal

      about 1 month ago
    • Vuss toppy
      Vuss toppy

      You missed 1 very important and missed by most installers. Acoustical dampening of the vehicle it self. You'll waste acoustical power vibrating the trunck, windows, etc. Think of it as your sub box needs to be rattle free well your vehicle is a box/enclosure as well. Tighten up the vehicle tighten up the bass. This also goes for HiFi audio too

      about 1 month ago
    • Jordon Grant Haysom
      Jordon Grant Haysom

      My issue is that it’s too bassy just sound like crap cos the bass is so loud

      about 1 month ago
    • Sinoops
      Sinoops In reply to Jordon Grant Haysom

      If your bass gets boomy and distorted at high volumes that means you have your gain too high or your volume to high.

      about 1 month ago
    • Kakureru D
      Kakureru D

      to check polarity of speaker, un hook from amp or headunit and touch on a 9v battery to speaker. whatever polarity of the battery pushes cone outwards, that's your speaker polarity.

      about 1 month ago