Can you hook up a car sub in your house
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Car sub woofer in a home audio setup
Hello everybody, recently i bought car amplifier for repair and decided that im gonna replace my Sony XM that i have been running as my subwoofer amplifier for a year now. I took this opportunity to write instructable on how to properly hook car amplifier for use inside of your house connected to mains voltage and what you should be careful about. There are many reasons why you would want to use car amplifier, but if you can choose between proper vv amplifier and car amplifier i would suggest you to pick house amp, its power supply is well designed and you will get proper power output out of it.
Car amplifiers are mostly rated at 14,4V and lower impedances 1 or 2 ohm for example while some home amplifiers can only go as low as 4 ohms. Since you will be running it off 12V power supply more about that in further steps you might not get as stable power as you would in your car. If you however still choose car amplifier then continue reading as i will try to provide as many information about it as i can.
I've been running car amplifiers in my room for 6 years or so, it used to be hard to get proper amplifier and if u were like me you probably had spare ATX power suplies so you could save a few bucks on that. These days it's much cheaper and easier to just get 24V chip amp from ebay and have decent setup. Even designing and building your own, internet is full of schematics that are just waiting to be built. If you already have amplifier you can just skip this step.
If you still haven't got one and you are thinking about buying it there are few things to consider. Most people are using class AB on mids and highs midrange speakers and tweeters while going for class D on subwoofers. Reasons for this are that class AB has better sound characteristics. There is alot of discussion about this so im not gonna go there, but main difference between them is power consumption.
This is thing to consider when choosing PSU and desired output power. Since you have your amplifier, you need 12V power supply to power it up. Only downside is they provide only 12V and not 14,4V. This means you are gonna get a bit less power than your amplifier is rated at some are rated at 12V and at 14,4V, some only at Other alternative is to get 12V power supply for LEDs or other things. These have small potentiometer so you can adjust voltage a bit higher, usually from V.
PC ATX usually requires green wire to be connected to negative terminal to power on. You can use simple switch to short them together. You will also need to cut off connectors and bundle together all 12V wires and Ground. Modifying ATX power supply for 14V output can be done if you have some electronic knowledge, but if you dont then you shouldn't be opening one. They contain capacitors that are charged up to mains voltage and can be deadly. For this reason i'm not gonna go further, if you are good with it you wont have any problems with it since its as easy as changing few resistors.
Add together power of all channels, for example if your amplifier is 2xW you get W, if you have monoblock 1xW or just bridge 2 channels use power that its rated at. Good rule of thumb is to multiply that by 1. Add about 50W of headroom to that. Check if your rating is a bit higher than your fuses on your amplifier. If you go under it, it may not be enough to blow fuses which could lead to damage of your wires, power supply or even burn them down. Now you see why its better to get class D for higher amounts of power, that's W difference for W amplifier.
Use max current rating of your power supply to choose your wire gauge. Its always better to get as big wire as you can connect to your power input that is as short as possible and then use longer wires to your speaker. With higher power amplifiers its good to also include fuse that is recommended with your power wire. Use online charts to roughly calculate your wire gauge, but its always better to get bigger gauge as they will have less drop in voltage with higher current draws.
I included diagrams for connecting psu to amplifier but if you have any questions just ask me in comments since your setup might be a bit different. This way your PSU would turn on at the same time as your amplifier. For audio input you need RCAs. Simple 3. You can get them in any bigger shop or even online. If you have high power amplifier and simple PSU wont get you enough power you could consider getting 12V batteries.
Don't get open types since they can produce a lot of hydrogen while charging which is not good considering you are going to have them in your room. SLA or Gel types are good for this since they are mostly closed and have better discharge capabilities deep discharge. This would require a bit different approach since you will need to get 14VV 0. Diode should be high power, rated at least few amps more than your max charge current, high power bridge rectifier could also work since higher current ones can be screwed to heatsink.
You will need to put switch on mains input of your PSU if it doesn't have one since overcharging lead acid batteries is never a good idea. As safety precaution you will need to add fuses since they can provide much higher currents up to A for single 10Ah battery! Unless you are doing something crazy just skip this step, in my opinion it isn't worth it for daily listening at normal levels.
If you wired everything correctly, you can turn on your amplifier now. See, that was easy. Now comes the tricky part, since all setups are not equal, you might get less or more power than advertised. Get 40Hz test tone for subwoofer amplifier, or 1kHz for full-range amplifier. Its safest to tune it at 0dB since that way you can't clip output signal even if you listen to rebassed or bass boosted music.
If you dont listen to those types you can get -3dB or -6dB but you might clip it with some music. Hook your audio source to amplifier, play test tone and turn the volume up. Your audio source might clip so firstly checking outputs with DD-1 or oscilloscope should reveal any distortion or clipping, if everything is ok you can raise your gain until waveform starts looking distorted as on pic 2 or clipping LED lights up on DD This should be done while your speakers are hooked up and using few test tones.
Since your speaker has impedance which varies by frequency you are playing it at, its always best to play different tones to see if amplifier distorts. Well you can do this by ear but it wont be as accurate. Simply do everything as described before, but when you raise volume up listen to change in sound. It's hard to describe it but you will notice that your speaker will change sound when it starts to distort.
Again make sure you do this at multiple frequencies to ensure output is completely clean. EXO made a good tutorial about that, so if i'm not clear enough watch this video or ask me in comments. Some speakers can handle more power than rated without getting damaged, some may not. To ensure you are not getting more power to them, use nominal impedance rating and ohms law to determine how high should voltage on output be.
For example if you have 4 ohm speaker that can handle only W, play test tone and raise gain until you get 20V on outputs and make sure waveform isn't distorted since clipping hurts speakers more than getting too much power to them. Getting power supply from china or suspicious sellers might not mean you will get exactly what you wanted, your power supply might not output as much current as it states on it.
Try measuring voltage on outputs of your PSU, if it drops too much it may trigger undervoltage protection to prevent any damage. First make sure your amplifier is stable at impedance of your speakers. Dont run 1 or 2 ohm speakers on amplifier that doesn't say its stable at those impedances. Check voltage on power inputs of your amplifier, if it drops under V it may trigger undervoltage protection on your amplifier. Some amplifiers have multiple colors of LEDs to indicate so check your manual.
If you want to make a true well made power source for testing car audio amps and preamps at home. Or for using car audio in your home, then I would suggest using a watt solar panel mounted on your roof or outside a window in the sun close by where you will be listening. And a solar battery charge controller hooked up to a amp hour deep cycle battery. Together you will have all the power you need to build a home triamped or biamped car audio system.
The only downside is toward evening the battery will no longer be charged by the sun and will no longer have unlimited reserve power, like during daylight since it is not receiving solar charge during darkness. So you will have to setup a v battery charger for the night and early morning hours to keep battery topped off. So doesn't drain more than half it's capacity.
Solar charging is inaudible while you listen to music, but using a v battery charger, you will hear transformer hum in the audio. So best to use your car audio system for music during daylight and not more than 2 hours after sundown. Question 5 weeks ago. Answer 4 weeks ago. As a good rule of thumb you should get psu that can produce same or higher current than fuses can take usually A on W amp.
Car batteries are usually made just to start car and not really for discharging them completely so if you would go that route you should use deep cycle battery. Constant trickle charge is not good, with open batteries it will produce a lot of hydrogen and that won't be good if you use it indoors, SLA on the other hand might lose some of acid due to evaporation and since they are closed you can't add it you can but it's a bit more complicated.
Would a 6x9" speakers with an 8" sub through the amp and two pc power supplies work? As I ideally don't want to use a battery for the extra power. Reply 4 weeks ago. Depending on power of amplifier and power supplies. You can always turn down gain on amplifier. Question 6 weeks ago. In step 4, are you saying you are able to connect the PSU 12v wire directly to the car battery? Then from there, go to the car amp? Isn't there concerns about overcharge or heat? Answer 6 weeks ago. You should use diode like shown on schematics and explained in step 4 since you can burn some PSUs by feeding 12V to their output.
There is a chance of overcharging your batteries if you have PSU that can deliver more than 14V so it's good idea to use switch to turn off psu, in case you are listening at higher levels you are gonna ask for a lot of current from battery so there is very small chance of actually overcharging battery.
First you need 12V power like in your car to power the amp so you need a cheap computer power supply (aka PSU). You could buy a 12 volt. Hello everybody, recently i bought car amplifier for repair and decided that im gonna replace my Sony XM that i have been running as my subwoofer.
That old equipment you have laying around the house actually has a purpose. By using an old P. To create this article, 14 people, some anonymous, worked to edit and improve it over time. This article has also been viewed 20, times. Learn more.
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Hello everybody, recently i bought car amplifier for repair and decided that im gonna replace my Sony XM that i have been running as my subwoofer amplifier for a year now. I took this opportunity to write instructable on how to properly hook car amplifier for use inside of your house connected to mains voltage and what you should be careful about.
Hooking a car subwoofer to home system
This will guide you through the process of installing subwoofers to an aftermarket CD player or stock in your car. To create this article, 41 people, some anonymous, worked to edit and improve it over time. This article has also been viewed , times. Car Radios and Sound Systems. Learn more.
How do you connect a subwoofer to an amplifier?
If you are music enthusiasts, then you will install a subwoofer in a double din head unit car stereo. When you install a subwoofer, it provides balance and power to your car stereo system. The speakers in the rear deck and door panels can only provide so much regarding bass, and that is why a subwoofer is important to make sure that, those lowest tunes in the music come out. I would recommend that you use a powered subwoofer to enable you to eliminate the need to add an aftermarket amplifier to power the large speaker of the subwoofer. There are several types of subwoofers on the market, and it might just be tough to select the best one for yourself. Remember a subwoofer is a square box which will provide your car with all the low-end bass notes in an audio system. The type of subwoofer you buy will entirely depend on the power of the bass you want for your car, your car type, your budget, and the size you feel comfortable. What you will get on the market include:.
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How To Connect A Subwoofer To A Car Stereo Without An Amp
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How to Connect a Subwoofer to a Receiver or Amplifier
If your subwoofer doesn't have an internal amplifier , you'll definitely want to connect an amplifier to it. To do this, you'll need your subwoofer, an amplifier, at least one set of RCA cables these are the red, white, and yellow jacks on a single cable , speakers , and speaker wires. First, you'll want to think about where you'll keep the subwoofer. Because the subwoofer is working mostly on the bass the low tones , it doesn't require as much directional pushing as speakers do. Since you'll have to run cables and wires between the subwoofer and other devices, you might want to keep it just a few feet from your screen. To get started with the actual hook-up, you'll connect the subwoofer to the amplifier using the RCA cable. If you want a stereo hook-up, you'll need two sets of RCA cables.
Have you taken your subwoofer out for the winter or just have a spare one and want to hook it up to your computer or home theater? Well no problem, it's really simple and surprisingly inexpensive. First you need 12V power like in your car to power the amp so you need a cheap computer power supply aka PSU. The only thing you have to worry about is if it provides enough power for your particular amp. See the next step for those details. Luckily every PSU has a large sticker on the side listing its max current ratings in amps for each voltage rail. See the attached image for an example.
Subwoofers are typically easy to connect, given that there are usually only two cords to deal with: You're far more likely to spend the bulk of time positioning and adjusting a subwoofer for the best performance than actually plugging in a pair of cables. However, not all subwoofers are so simple and straightforward, depending on the specific model and maybe some personal experience. If your receiver or amplifier has enough variety, you should be able to handle most any subwoofer out there. Almost all home theater receivers or processors and some stereo receivers have this type of subwoofer output. It's usually just one cable with single RCA connectors on both ends. Sometimes you'll find that a receiver or amplifier does not have the LFE subwoofer output. Or it might be that the subwoofer doesn't have the LFE input.
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A subwoofer meant for a car stereo can often give you better sound quality on your home theater system. The problem is that this subwoofer requires an amplifier that runs on volt power, like from a car battery. The subwoofer and amplifier would fry if either was plugged into a home power socket. So you need to plug in the subwoofer's amplifier separately with a power inverter and then hook up that amplifier to the main amplifier on your surround system. Get a power inverter that converts the power from your home outlet to 12 volts. Plug the car amplifier into this inverter; it will have a three-pronged socket for you to plug into.How to hook a Car Amplifier to Your House ! (Own Risk!)