- #Should i wire amp to battery ground isolator how to
- #Should i wire amp to battery ground isolator full
- #Should i wire amp to battery ground isolator Pc
Use max current rating of your power supply to choose your wire gauge. Now you see why its better to get class D for higher amounts of power, that's 200W difference for 500W 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. Check if your rating is a bit higher than your fuses on your amplifier. Divide that by 12V and you roughly need current of 67A for class AB or 55A for class D. So your 500W amplifier actually draws 750W if its class AB or 600W if its class D. Good rule of thumb is to multiply that by 1.5 for class AB and 1.2 for class D. Now we come to a part where difference between AB and D class comes in play.Īdd together power of all channels, for example if your amplifier is 2x250W you get 500W, if you have monoblock 1x500W or just bridge 2 channels use power that its rated at. Modified ATX (PC PSU) for car amplifier - 14V output 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. They contain capacitors that are charged up to mains voltage and can be deadly. 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. You will also need to cut off connectors and bundle together all 12V wires and Ground. You can use simple switch to short them together.
#Should i wire amp to battery ground isolator Pc
PC ATX usually requires green wire to be connected to negative terminal to power on. These have small potentiometer so you can adjust voltage a bit higher, usually from 11-14V. Other alternative is to get 12V power supply for LEDs or other things. 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 14.4V). Only downside is they provide only 12V and not 14,4V. PC ATX and Server power supplies offer a lot of power and they can be cheaper than other solutions. Since you have your amplifier, you need 12V power supply to power it up. This means that by using same power supply (next step) you can get more power with class D amp. Both amps were set to 20V output (about 100W to 4ohm dummy load), class AB is drawing 17.6A (230W at 13V) and class D is drawing 11.8A (150W at 13V). On last 2 pictures you can see difference between GZTA 4.120mk2 (class AB) and GZTA 1.2000mk2 (class D). If you have smaller amplifier (less than 250W) it may not be problem since even with 50% efficiency it would only draw 500W, however if you have bigger amplifier it would draw insane amounts of power so you will need bigger and more expensive power supply. This is thing to consider when choosing PSU and desired output power. While class D has excellent efficiency of +80%, class AB might be only about 50-60% which means they will also heat up alot more. There is a lot of discussion about this so i'm not gonna go there, but main difference between them is power consumption. Reasons for this are that class AB has better sound characteristics. Most people are using class AB on mids and highs (midrange speakers and tweeters) while going for class D on subwoofers. Mainly when choosing amplifier you are gonna choose between Class AB and Class D designs. If you still haven't got one and you are thinking about buying it there are few things to consider. If you already have amplifier you can just skip this step.
#Should i wire amp to battery ground isolator full
Even designing and building your own, internet is full of schematics that are just waiting to be built. These days it's much cheaper and easier to just get 24V chip amp from ebay and have decent setup. 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. If you however still choose car amplifier then continue reading as i will try to provide as many information about it as i can. 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. 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. There are many reasons why you would want to use car amplifier, but if you can choose between proper 120v-240v 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.
#Should i wire amp to battery ground isolator how to
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. Hello everybody, recently i bought car amplifier for repair and decided that im gonna replace my Sony XM-4020 that i have been running as my subwoofer amplifier for a year now.
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