Subwoofer size, voice coils, wiring, matching amp EXPLAINED! Car Audio Subwoofer Basics
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- Опубліковано 26 лип 2024
- Even if you are new to car audio you likely know that a subwoofer allows you to improve the bass performance of your system. But from there things can be confusing! What size subwoofer should you get, what is all this talk of dual and single voice coils, how do you match the sub to the amplifier? Let's cover some subwoofer basics!
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Hey dudes! Thanks for tuning in and saying hello! Always appreciated! This video is obviously more on the basic side for our new to car audio friends, everyone starts somewhere! It's been wicked cold the last few weeks and difficult to get into the shop to build, but more build content will be coming soon! I did a live video the other day on my Instagram @caraudiofab giving some insight to what the next build will be, check it out! Thanks for watching guys!
Where are you located i would be interested in a sub box build from you
Awesome video Uncle Mark! 😍❤️❤️🙏 Learned a lot and loved it❤️❤️❤️ You deserve more good for your dedication🙏🙏🤩🤩🥰🥰🥰🥰🥰
M*********** you can't get anything ever finished
hi
what's up bro
please I need your help, I have a Honda pilot 2007 model that's comes with factory fitted car sound system, I want to change it to a new model radio, I have (JVC KW m 150 BT) so now I don't know the kind of Amp, subwoofer, Tweeter, etc, please help me, tell me what and what will I buy to make the sound perfect in this car please tell me
I just got back from school.... Time to get schooled again, but this time by someone who actually explains in depth.
True
I know right. Why couldnt school be like this. I actually enjoy learning from him.
What school did you go to, I went to one in Massachusetts years ago
Its nice to see an audio guy that probably paid for his own training, educating others for free. Its also nice to see a guy that doesn't fall prey to being bribed to pushing any one certain product manufacturer
Man I love Crutchfield they helped me out with a wiring diagram
This is literally the most MVP video I've needed so far.
I love how easy you make things to understand.
Yes, this is definitely a need to watch video as this can be confusing for some. You did a good job explaining it do it would not be so confusing. Keep this up as not everyone who watches these is an expert. Stay safe mates!😊👍🏻😷
I love Crutchfield!! I purchased a 500 watt sub amp, and power wedge on site at the Charlottesville store! Shout out to Gus!
Amazing explication Mark. Saludos ✌🔥
First time I’ve seen the vented box vs sealed box math of Fs(Hz) divided by Qes. Very helpful.
I've been waiting on a video like this
Another upload? I'm ready for this
I'm still a little confused about dual voice coils. What is the difference between a DVC 4 ohm and a SVC 2 ohm? Are they exactly the same? Does the DVC raise the wattage by lowering ohms? If you want 2 ohms, why not just buy a 2 ohm SVC sub?
Great video, honestly.
We"ll explained loved it.nice content
Now this video is very informative
I built my own 18. It's infinite baffled/walled in a 96 Prelude. I only have it on 1kW RMS but it's EASILY 2k capable which is the RMS rating of my amp.....I'm just scared to turn it up lmao. I do have to give this man SUPER credit though. Had he responded to the message I sent him then I sure as hell wouldn't have gone as far down the rabbit hole as I did. Dude knows his stuff and I've learned alot from him.
Thanks again Mark!
Getting ready for Knowledgefest Dallas by binging on your videos
Great work and very well explained now you need to do a video how lower the inpedence the way you do it
Hi Mark, I was wondering why you have never mentioned infinite baffle subwoofers on your channel? Nevertheless, your videos helped me a lot, great content!
love how i've got w3s and that's his example! they love a sealed box
Great Video Mark, I’m always learning new things from you. Do you have any videos of how to drop impedance of speakers to get more output from your amp? I’ve dabbled in car audio for years, and have never found a video on how to do it. For example I have a set of component front speakers that are 4ohm and would like to know how to wire them 2 ohm with using the component cross overs ??
Add another set of 4ohm speakers in parallel.
Does cabin volume make any difference? I know that you need to make sure you have enough box volume for a given sub but is there a point when the air space in the car is too small for your sub system?
That MTX 7500 is looking good In the thumbnail
Can you wire each voice coil to its own channel? Dual voice coil on a 2 channel amp (as a monoblock)
Nice looking sub you were holding. What brand and model?
I recently installed 2, Dual xs10"s, 125w(rms) 4ohm-wired to 2ohm powered by a Boss R1100M on my stock '11 Traverse bose w/factory amp &sub. Had to add a loc to stock hu & worked great for a few months. Recently, the amp is going into protect depending on the volume and bass output. . Please send help!
@mark Can you wire a two coil sub to two different channels on the amp. And if it's possible will it perform better because you have twice as much output power
How did you get that BRCC stitching in the car seat? That's so sick
I have a question for you Mark which are the best 6.5 speakers in the market with plenty of watts.
Is there a way to determine the minimum RMS needed to give a given sub? For instance, if a sub has a RMS rating of 400W, what is the minimum RMS needed to power the sub?
What size subwoofer should I use for my 05 dodge caravan?
Q: Can i connect each pair of coils to 2 separate amp channels? i mean in a 2ch amp with the same input signal in both channels?
The variable missed, and can be introduced later, is that single voice coils are more efficient than duals due to less mechanical moving mass. If a single sub 4ohm load is the goal, choose a SVC over needless 2ohm (series) or 8ohm (parallel) DVC's. A new to industry person may purchase a DVC cause it sounds cooler bragging about it not knowing they are actually getting less decibel capability. If dual subs at 4ohm is the goal, grab two 2ohm SVC subs. Thoughts?
need help matching my jl audio wedge bass box with two 12 WOs ...... 600 watts rms at 2 ohm... what amp is better for this speaker set-up????
What would be the better set up? 1 amp at .5 ohm or 2 amps strapped? Sub is a dvc 1 ohm sub. If amps are strapped, what would be the final ideal impedance? Thanks!
I understand rms, but what about max? Does max mean I can push it to that level? I heard with Rockford subs they under rate their watts, is this true? I had a p3 12” before when I was a novice and basically everything was max and I never blew it. This was also using a db drive 1500 watt amp.
I have a question??? I have two 10 inch woofers under my rear seat facing down in my nissan frontier. They are cheap subs by Rochford Fosgate R2. They sound good for the money. I would like to upgrade to the JL Audio 10 inch TW3 (2) I picked since space is very,very limited. Would I hear a difference on my lows ,louder? Or do you think what I have already is the maxed since I have limited space?
how would you wire a - single skar ix 10d4, combined with a rockford fosgate r150x2? series or parallel?
Can you have subwoofers facing each other on either side?
Myth of underpower comes from miss understanding or ocer simplify its the clipping getting terrible audio.
I would like to add that adding more power you can get higher clean output because it reach the subs max output will be lower then the amps max output so you will never get clipping. And can get extra sound from poorly formed audio outputs
Question: Building a under seat (2) 10" box for my 2021 Honda Ridgeline. Would it be better for individual boxes or 1 box with both subs without a separation? I have shallow mount subs and can accommodate internal net volume for both subs. Does it really matter for bass output on the subs if they are chambered?
Doesn't matter for sealed boxes. I always keep them separated when putting more than one in a box, just because it's easier to tell which one is blown and the other one doesn't blow from the sudden pressure loss.
Ported boxes generally aren't divided.
If you can mount the subs close to each other so the speaker frames are practically touching, you get a coupling effect which can improve output. In that situation you would also build a single chamber. Otherwise separate is better as it also gives more bracing and makes a stronger box.
Can I wire a 4ohm subwoofer and 2 ohm component speakers to the same amp?
@ mark question would a hd1200/1 amp blow my 2 jlw3 subs or can they handle that power I just happened to find a good deal on one but need your opinion before I get it
No! As long as you adjust your gain, you should be fine.
Mark anything on powering class a/b amps for my garage. I have some old Brax and dls amps which I would like to utilise in my garage. Struggling on power supply!!!
I had the same problem i ended up ordering a power supply for led strips. Just look up Ac to Dc power supply 12 volts and those little silver boxes that come up work very well and can take alot of power too!
@@forgottenmusicrevival7201 I’m not sure they will do but thanks for the suggestion. Amplifiers can draw a lot of current and I don’t thing the led trannys will drive them. I currently have some optima batteries but once drained they need to be recharged
Use pc power supply
Hi I have a jbl cs1200t (1000w) subwoofer but no amplifier. Could you help me select an amplifier for this sub? Thanks
I have a question. I have a 2016 bmw 528i. I want to replace the under the seat 8 inch factory subs out for an after market 8 inch mid range Loud speaker. Can you help me with recommendations?
I like that shirt
hey mark i have 2 jl 12s in a ported box with a jl amp how would you recomend the amp bass boost setting on or off i have a factory head unit
You don’t want bass boost on because your setup can clip which lessons the life of your speakers and subs, and Other things can happen also.
Off, unless you like it better On. If you're going to use it make sure to set your gain with it On, else you'll be clipping like a bastid.
@@gakudzu7282 thanks for the help i think i need to set my gain again lol but rarly does it sound like distortion is happening
About the mounting depth, why dont you mention that you need enough space behind the sub equal to the breather hole in the sub?
This is an issue for a lot of trucks when mounting a Sub behind the rear seat.
need help... i have an old school amp mtx thunder 2150X that can be bridged at min 4 ohm, also have the JL Audio wedge bass box with a pair of 12s W0s, those are wired parallel diwn to 2 ohm. would you recommend wiring in series to make them 8 ohm?? plz help
Would be best to get another amp, you will be missing out on a lot of performance at 8 ohm
@@CarAudioFabrication JLAudio JD500X1 $320 or Fosgate R2 500X1 for $100 less and also comes with the bass knob??
I agree. You could wire each sub to its own channel on the amp until you can get a new one
You more explain why i want you to be the person to build my next box
Hallo my friend
I have a question , i wanted to know your opinion..'' because you have so much'' experience. I have bought Focal 165KX3 speakers, and have yet to buy a subwoofer.. I have my eye on the focal E25K and the Jl 10w3v3.. Which sub would you take? Grt Jermain
I was taught years ago that bridging a 2 channel amp for a subwoofer would cut the impedance of the sub in half.
Example.
4ohm sub on a bridged amp would see it as a 2ohm load.
Is this correct?
That's one way of seeing/describing it...
A channel puts out a certain max voltage and can deliver only so much current (before letting out the magic smoke). The ratio between the voltage and current is the impedance it can support - let's say 2 ohm.
When you bridge 2 channels you put them in series, doubling the voltage to the load. But the amp can still only supply the same current through the output transistors.
To keep the current the same while doubling the voltage you need twice the impedance.
So an amp stable to 2 ohm per channel in dual channel (stereo) mode, is typically only stable down to 4 ohm when bridged.
Which can be described as that each channel in the bridged pair "sees" half the load.
No. The amplifier will "see" whatever load the speaker is. 4ohm speaker? 4ohm load. 2ohm speaker? 2ohm load.
However, as stated above bridging a 2ohm stereo stable amp will usually only allow you to load the bridged channels to 4ohms.
Bridging the amp doesn’t effect the impedance of the speaker, the speaker is the load.
So bridged amp is good for 200 watts at 4 ohms, that means you can connect a total resistance of 4 ohms or more, 8 ohms, 16 ohms etc, because you are increasing the resistance and therefore lowering the power output. If you try to run 2 ohms on a bridged channel that’s rated for 4 ohms it will not end well in most cases.
Hi, what's better 2 10s 500 watt rms or 1 10 500 rms, thx!
Depends on box, available space and subwoofer parameters. A proper box design for each would be a good way to predict performance ahead of time. www.caraudiofabrication.com/box-designs
2 10s on 500 rms or save up for 2 12s on 1500 rms minimum.
Hey guys can y’all help me . I used amplifinder to find an amp that matches my 10inch kicker compr 2ohm. It can get 400rms . Using amplifinder , I found that kicker cxa400.1 was a good choice for that sub. Reading into it I saw that this amp can do 300rms at 2ohm (since my sub is 2ohm). I’m wondering how much I should set my gain because before this I used to have a 10inch kicker compc that could handle 250 rms and the amp was a kicker cxa300.4 . So a 4 channel amplifier. After reading stuff I saw that for one channel the amp provided less rms than the 250 that my sub could handle. Sooo I turned the gain and bass boost all the way up . Idk if there was slight distortion , but it definitely sounded good and really loud and it kept me satisfied for months. However randomly one day the sub blew . This doesn’t make sense to me because the amp rms for one channel is lower than the sub . The sub can handle more . So how did the sub blow and not the amp. So now I got a 10inch compr 2ohm that can handle 400 rms and the kicker 400.1 that can handle 300 at 2ohm. I hope this is a good choice .I guess my question is when should I know when to stop adjusting my gain because it sounded fine months ago with my compc, but it ended up blowing. I’ve watched videos on doing it by ear and a multimeter , but the ear method clearly didn’t work for me because the gain just seemed like a volume knob and I didn’t hear distortion in the sub, it just got louder. And the multimeter one is confusing for me because if I do the math, the square root of 300rmsx2ohm for the amp .. is lower than the square root of 400rmsx2ohm for the sub. I know that that’s my target voltage but which one do I do and is it really that accurate. I also don’t know if my multimeter is good because it kept jumping to 70 or so on the AC setting and it would never go to 0.
Dude your gain is not a volume knob, it has nothing to do with volume. The gain matches your head unit to the amp. If you had the gain up to high and turned the volume up, you probably sent a clipped signal to your amp, which in turn sent a clipped signal to your speakers, which caused the speaker to let go. Distortion is harder on any speaker than under powering them.
Let’s say your head unit is only putting out 2 volts, on the RCA’s, then you would turn the the gain up to match that 2 volts.
If you turn the gain up, it will send a clipped signal to the speakers you are powering with the amp.
Using the multimeter and the math to calculate where the gain needs to be set will work but it’s not ideal. The old way was to use an oscilloscope, that way you could see the waveform of the signal. If the signal was flat on the top and the bottom it is a clipped signal, it should be rounded off.
Do it right, get the tools you need read or watch videos on the subject, take your time and enjoy. Don’t waste your money by improperly setting up your system, it’s not cheap, and improperly setup systems sound terrible.
The simplest way is to find the output voltage of your head unit and set your amp gain to match. 2V out from HU? Set gain to 2V. 4V out? Set to 4V. It won't be "perfect", but it will be good enough in most cases.
The likely reason the old sub blew on lower power is that you cranked on the gain but couldn't hear the distortion/clipping. It's been my experience that most people can't hear low frequency distortion. So many times peeps have bragged on how good their shit sounds, but it's mad clipping. Drives me nuts. I could hear it starting at half-volume.
So personally, I'd go with an amp making at least 500W@2ohms, and match the gain to the RCA voltage at around 95% of max volume on the head unit.
Where can I chit chit to someone about learning this stuff?
I'll pay $50 for solution. 2 of my 4 mid bass door speakers (front passenger and rear drivers) make static crackling noise for initial few mins of starting car then goes away. Most of the noise disappears when I disconnect my LC7i and all RCAs going into the mid bass amp. I've tried disconnecting my power wires to my sub amp, I've rerun wires, swapped out speakers, swapped grounds, added grounds, jiggled wire connections, smack amp, nothing is helping. Only time it disappears is when I disconnect speaker wires from amps output, or when turning off vehicle of course. It is not engine noise bcuz the sound doesn't fluctuate or change at all with rpms. Any thoughts? I'm aware of the basics such as ground loops and power wire and rca interference. I need to resolve this before I upgrade IN 2 WEEKS TO 20,000 RMS WATTS. I'll pay $50 if you can solve. Feel free to ask away.
Have you tried a different amp or LC7i? It is also possible this is an issue with the factory system that is not avoidable without a higher level of integration.
Could be bad aftermarket head unit module. My crux module was defective out of the box. The static noise on mine would also jump location and would come and go randomly.
Have you tried moving the ground isolation jumpers inside the LC7i, also was the unit installed after the factory amp if this applies?
I just want to replace the subs in my Supra.
If Mark was to tool that CAF into an actual basket....
Hi
Hello
hi
what's up bro
please I need your help, I have a Honda pilot 2007 model that's come's with factory fitted car sound system, I want to change it to a new model radio, I have (JVC KW m 150 BT) so now I don't know the kind of Amp, subwoofer, Tweeter, etc, please help me, tell me what and what will I buy to make the sound perfect in this car please tell me
I'm in Africa but I wish you on UA-cam, Facebook etc
stay away from voice coils that have the multi vented formers, these holes will weaken the former neck and cause a collapsed voice coil...as long as there's a single vent right down the middle of the pole should be way good enough in sound quality and reliability
Technically adding a subwoofer decreases bass performance but I am the only person that can understand this does this mean my brain is different from everyone else’s brain?
Already have tinnitus, the ring in your ear the don't have a cured, fucked lets get a sub.
Feel like I’ve seen this video before :|
ngl this is confusing