Question about Sony XS-L1200B Car Subwoofer

1 Answer

Enclosure type I'm wanting to build a new enclosure for my subs, I have 2, and I was wondering if sealed or ported/vented would give me the best sound, Im looking for more low frequency sustained instead of just pounding bass.

Posted by on

  • Carson Donham Jan 06, 2007

    How exactly would I phase the speakers backwards?



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 20 answers of more than 400 characters.


    An expert who has answered 20 questions.

  • Expert
  • 72 Answers

Sealed box and somewhat large if they are 12's I usually try to get 3 cubic feet overall internal dimensions and generally the inside dimensions will be 13" tall 32" wide and 13"-14" inches deep. with no divider and make sure the box is sealed. Personally I like to phase the speakers backwards. Gives the bass a little more rumble.

Posted on Jan 05, 2007

  • Rod Marovets
    Rod Marovets Jan 06, 2007

    to phase a speaker backwards just means to switch the positive and negative wires around. The sound leaves the amp through the two wires for each speaker. So there is four wires in all. Positive from the amp to positive on the speaker. Negative on the amp to negative on the speaker. To swithch phase just flip it around positive on the amp to negative on the speaker. Negative on the amp to positve on the speaker. Be sure to due this to both speakers. What it does is it changes the dirrection the speaker drives. If you hook a 9 volt battery to a speaker one way it will push out. if you flip the battery around the speaker will pull in.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How much air space is needed for lanxar max st 15d

it depends on the type of enclose you are building and number of drivers .. you can build them and share air space or build it to were neither sub shares any air space.. if you buy a prefab enclosure for your 15s what ever q logic or q power or any other manufacture choses to build a universal port or vent or sealed box will be just fine.
which type of enclosure are you looking for ..

1.6 cuft to 2.5 cuft per subwoofer check out the sub boxes from qpower and there specs for 15"BASS15 3HOLE 40 1/8 x 21 x 21 x 17 2.5cuBASS15 4HOLE T 42 x 18 x 18 x 16 1/4 1.6cuqpowers specs from there website

Oct 29, 2013 | Car Audio & Video

1 Answer

12 inch sub(JBL) in box with a 500 watt pioneer amp, sounds good with some types of base. would you cut a port hole in speaker box?

riverray1969 it would help if I knew the exact model number of that JBL sub you are referring to. With that info I can provide exact specs.

Basically, you need to build/modify an sub enclosure that is suited for the sub, the music you mainly play, and vehicle tuning. Generally, sealed enclosures will provide tighter bass response and get decently loud. Some would argue that it will give you greater sound quality. A ported enclosure will give you a louder more booming sound. That depends also on where the port is tuned (ex. 32 hz, 36 hz, etc ). You need to make sure that the enclosure meets the sub's airspace requirement as well. A customized well made enclosure is just as important as the sub you put in it.

Oct 16, 2012 | JBL P-1020D Car Subwoofer

1 Answer

Hi i have a 15"w3-d4 jl audio sub,can anyone tell me what size antype box i should use ie sealed or ported and the box dimensions

I've had a look at the JLaudio website and they recommend 2 box designs, a ported and a sealed.
The sealed box needs a volume of:
2.125 ft3 or 60.2 litres.
To get this you would need to build the box to these dimensions:
22" x 16" x 14.75" or 559mm x 406mm x 375mm
The ported box needs a volume of:
3.50 ft3 or 99.1 litres.
To get this you would need to build the box to these dimensions:
24" x 19" x 18" or 610mm x 483mm x 457mm.
The port needs to be:
3.0" x 10.9" or 76mm x 277mm.
The enclosure recommendations listed above are external dimensions which assume the use of 3/4" (19mm) thick material. If you are using 5/8" (16mm) thick material, subtract 1/4" (6.5mm) from each dimension. Do not use any material with a thickness of less than 5/8" (16mm) as this may compromise the rigidity of the enclosure.
• All enclosure volumes listed above are net internal volumes! Driver displacement, port displacement and brace displacement must be added to obtain the final gross internal volume. All enclosure dimensions above have already taken this into acount.
• When using two subwoofers in a common enclosure simply double the required volume and, in the case of a ported enclosure, use two times the recommended port(s). Likewise, when using three subwoofers in a common enclosure simply triple the required volume and, in the case of a ported enclosure, use three times the recommended port(s).
• We recommend the use of this speaker in a bi-amplified system using high-quality satellite speakers and a high-quality amplifier. We do not recommend the use of this subwoofer with a passive crossover (coil), as this type of device will adversely affect performance.
As you can see it all depends on the space you have available, whilst the vented box will give you a more efficient bass responce especially with the low range frequencies.

If you to go and look at the information about your sub woofer and find out all the information about building or buying the correct enclosure then this is the link to the pdf file I found:
The enclosure info is on page 3:
JL AUDIO 15W3 Tech Specs and box info.
Warm regards

Oct 12, 2010 | Jl Audio 15W3-D4 Car Subwoofer

1 Answer

Should I use a vented box or a non vented box for my ALpha PSW412

Well, First you need to figure out a few things. How much room you have is one main consideration, If you go with a vented (ported) enclosure or band pass (see below) than you will need more room than with a seal enclosure, If you really have no room you can mount them " Free Air" which is mounted on a board and fired into the back seats, the Truck acts as the enclosure.
Now the type of bass you want is another consideration. The best enclosure for maximum bass is a bandpass box. It is 2 subs facing each other with one side fully enclosed and the other side ported. This is best for deep powerful bass but the enclosure can be rather large. Vented boxes are second best (In my opinion) they give you deeper bass and more power than the sealed boxes. Sealed boxes give you less power from your sub and are a little flatter. Some say that the bass is more accurate and tighter , depending on the type of music you play. Rock you would want a tighter bass(sealed) and hip hop or techno style you would want a deep bass(ported). Lastly you have the free air which gives you the least amount of bass and is usually rather flat sounding. If you have the room go for the band pass box, if room is an issue than go with a sealed and specifically design box for you vehicle. Alot of places design boxes for almost every car out there. Just make sure that have a well designed box, It makes a world of difference, than an improper box.

May 22, 2010 | Alphasonik PSW412 Car Subwoofer

1 Answer

Want to find out the best type of enclosure for 2 lanzar max pro 124d subwoofers

you best type of enclosure will be a sealed enclosure or you can build it with a partition in the middle seperating the 2 subs and port each side.

heres a link that will give you the specs for your sub

Sep 07, 2009 | Lanzar (Pair) MAXP104D Max Pro Series...

1 Answer

I have a 12W7 jl sub with no enclosure or amp.

Hello cdoran93,

Well, "best" and "loudest" are mutually exclusive. You can configure for one or the other, but not both at the same time.

The best (most accurate) bass is produced from a sealed enclosure, while the loudest (highest spl) is produced from a properly tuned ported enclosure. The recommended sealed box volume is 1.375 Cu.Ft. Ported is 1.75 Cu.Ft. For a ported enclosure, you need to decide what frequency to tune it for and then look at the JL specifications to the size of the port. has both types of enclosures at prices starting around $70.

Hope this helps.

May 11, 2009 | Jl Audio 12W7 Car Subwoofer

1 Answer

Have kenwood mono amp 4,2,1 ohm capabilitie. What is the best sub to run. The amp is 1600 watts, howmany ohms and 1 or 2 voice coils.

Hello pelikant75,

The best answer depends on your budget for the sub(s) and exactly what kind of sound you are looking to get. Your amps RMS output at 4 ohms is 200 watts and at 2 ohms, it's 400 watts. I could not find that it was 1 ohm stable.

If you are looking for the absolute best bang for your buck, I would highly recommend a pair of entry level MTX 10" subs, model 4501-04, currently priced by Crutchfield at $49.99. And if you buy a pair, they throw in a free Bass Slammer BS210S sealed enclosure. The MTX's power range is 112.5 to 225 watts each, right in there with your amps output. 2 of them in parallel give you a 2 ohm load, just right for your amps best power. And they sound great. You simply can't find a better deal for $100 bucks!

If you want a little better SQ, a pair of Rockford-Fosgate P1S410's should be considered. Again, going to Crutchfield, they currently have this one "BOGO" (buy one get one) for $99.99. You will have to provide your own box, though, no free one with these.

Finally, if you want the best SQ, and your budget allows, consider a set of Alpine SWR-1022D's for $179.99 each. These have dual 2 ohm voice coils, allowing you to series the coils and parallel the subs, resulting in a 2 ohm load to you amp just like the MTX's and RF's recommended above. You will probably want a somewhat larger enclosure for the Alpines as well as a fatter wallet. Your amp is right at the lower end for powering them, so they probably will not be as loud. But they will sound good.

One thing we haven't discussed is the box. The enclosure is just as important, perhaps even more important than the sub(s). More accurate bass is generally produced from a sealed enclosure. A ported enclosure will be louder, but at the expense of sound quality. And whether it's sealed or ported, the enclosure needs to have enough internal volume for the particular sub you are planning to use. A sealed box in the range of .75 to 1 cu/ft will be OK for any of the recommended subs. Add about 15-20% more volume for a ported box and keep in mind that the port needs to be specifically sized for the frequency for which it is tuned.

Hope this helps.

Apr 12, 2009 | Kenwood KAC-8101D Car Audio Amplifier

1 Answer

Choice of speaker box

If you're looking for SPL (LOUD) go vented.
If you're looking for tonal accuracy (Sound Quality) go sealed.

The tradeoff between the two is that a ported enclosure will allow your subs to play highly powered. More air flow - better cooling of the voicecoils.

Sealed enclosures dont like much power because the coil cannot breathe and heats up rather quickly.

Its up to you, and your listening type.
Just remember LOUD = PORTED

Bandpass is kind of a mixture of the two, however you give up some of the frequency range the sub plays at - and I dont ever recommend a bandpass enclosure to my customers unless they are looking to be flashy and light up the cones or magnet assemblies.

There are advantages and disadvantages to every enclosure type.
Pick the one that best suits your taste, and be sure to fire it toward the rear of the vehicle for the best response and cabin gain.

Thanks for using FixYa - a FixYa rating is appreciated!!

Feb 24, 2009 | Pioneer C-Type TS-W306DVC Car Subwoofer

1 Answer

The best bass in this case

HERE is the owners manual for your sub.

If looking for LOUD, ported enclosure is the way to go.

If looking for accuracy, build sealed.

You dont have enough depth for an isobaric setup.

using the maximum dimensions given, 8x13x41, the volume of the biggest enclosure you could make (assuming 3/4" MDF material) is 1.7cu ft.

To tune this 1.7cuft box around 50Hz, you need (1) 4" round port 5" long.

MTX recommends an enclosure of 2cuFt ea. You will only be able to use 1 subwoofer in this application.

Even a sealed enclosure is recommended 1.25cuFt.

You can shove 2 in the vented enclosure, but you may not be happy with the outcome.

Thanks for using FixYa - A Fixya Rating is appreciated!!

Jan 27, 2009 | Car Audio & Video

2 Answers

Best sub For RF T10001

There is no "best" its a matter of opinion, and fabrication. I have installed $75 subs in the properly fabricated and tuned enclosure that sound like $300 sub in a pre-fabbed enclosure. For volume, you will need a vented enclosure. For sound quality, a small sealed. Both have pros and cons. SoloX 10 is 2500W rms 5000W peak.
Kicker is plastic. Solobaric may be your best choice in such a small space, however soundsplinter makes an 8" RLi sub that will kick a$$ in the proper enclosure.
When looking to buy, compare x-max : as this is the linear distance the cone will move. More movement = more air displacement = more volume.

Dec 13, 2008 | Rockford Fosgate T10001 bd Car Audio...

Not finding what you are looking for?
Sony XS-L1200B Car Subwoofer Logo

181 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Car Audio & Video Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

xxxxxx xxx

Level 3 Expert

4905 Answers

Larry Stiles
Larry Stiles

Level 2 Expert

287 Answers

Are you a Sony Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides