When using one large wire for multiple amplifiers you'll need a way to split the power wire into smaller wires for each component. I prefer to use a regular distribution block, not the fused type. They're less expensive and there's no need for the extra fuses when there is already a fuse holder near the battery that protects the main power wire you'll have to install this fuse holder.
This assumes your amplifiers already have built in fuses that are designed to protect them. For amplifiers that do not have fuse protection you should use a fused distribution block. I often ground my components using separate ground points.
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I could go into all of the scientific reasons for this but it all boils down to noise. In my experience you have less chance for noise when you separate ground points as compared to using a single ground point.
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That's not to say that either way is a sure fire method to eliminate noise but it helps if they are separated by at least six inches or so I've found. That being said, any grounding method that is both safe and effective while keeping out noise is a good method. I choose to separate the grounds but some installers choose to run them to the same point.
If you choose to run your ground wires to one point you can also use a distribution block. If you do not use a distribution block then you will want to stack your ground wires so that the largest current carrying wire usually from your largest amplifier is on the bottom closest to the ground point and that your smallest current carrying wire is on the top closest to the head of your grounding screw. Now that you have your power and ground wires connected you'll need to give your amplifiers a music signal usually the RCA cables run from the head unit.
If your head unit is lacking these extra outputs then there are several other options. If your amplifiers will be powering dissimilar speakers subs, mids, tweeters, etc. Sub-bass frequencies would be sent to the subwoofer amplifier and high pass signals would be passed to the other amplifiers. The crossover will have built in line drivers which will increase the voltage of the low level signal. This can help lower the noise of the system.
Car Audio: 2 amps 1 power cable? - Ars Technica OpenForum
Certain after-market stereo head units may feature several RCA output connections, located at the rear of the device, specifically design for external amplifiers. Connecting multiple amplifiers to an RCA audio source will provide superior signal quality over speaker level connections from the stereo head unit.
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Disconnect the "Negative" battery cable from the battery, using an appropriate size wrench. Read the documentation for the head unit and determine the type and number of RCA outputs available at the rear of the device. Certain head units may include one or several RCA outputs, providing separate signals for the front and rear speaker channels, while a third subwoofer channel will handle low frequency sounds.
Remove the bezel surrounding the head unit faceplate to expose the removal key slots, if applicable. Refer to the installation and removal instructions for the head unit for specific guidelines needed to slide the unit out from the mounting chassis. Insert the specially designed removal keys into the removal key slots, found near the left and right side edges of the head unit. Slide the head unit out of the chassis to expose the available rear RCA output connections.
Disconnect the antenna cable and main wiring harness from the rear of the head unit.
Car Audio: 2 amps... 1 power cable?
Place the head unit in a safe area. Connect the batteries in the car with a large ground wire and ground it in metal. Be sure to put them in a sequence: By getting a larger alternator that puts of more amperage, your battery will be continuously and quickly charged. Whenever massive amounts of power is needed, it's directed from the alternator much more than the battery, giving you more power.
A good amp alternator can really make a difference in sound quality and bass. You just have to find it for a good price and have it installed. Check and double-check all connections. Before you turn on your car, make sure all connections are solid and correct. Make sure all amps are properly grounded and REMnd. Excess wire should not be sticking out and relatively close other wires of different charge.
Use fuses for all battery to amp connections. If you blow a or amp fuse just by listening to music, then check specialty stores for and amp fuses. Finally, use electrical tape your best friend when dealing with wire to cover up exposed wire. A thin strip can stop your entire system from being nothing but overpriced junk.
It all depends on what kind of car you have. Some dashboards have clips were you can pop your dash off and other cars have some screws you need to take off before you pop it off and it's the same with door panels. There will be some screws once you take them off lift up on the panel and pull it out.
Not Helpful 1 Helpful 1. I want to upgrade my car sound system from a 10 inch with 2 amps W to two 15 inch subs. How do I do this?
Installing Multiple Amplifiers
Answer this question Flag as Include your email address to get a message when this question is answered. Already answered Not a question Bad question Other. Warnings The simplest, but ill-advised, method for connecting multiple amps is to connect the wire to the amp, and through the same terminal, have another wire extend out to the next amp.
However, many complications can arise from using one wire to power many amps. Unless you really need to, do not get multiple batteries or capacitors. This is by far the most dangerous aspect of any high-end car audio system, as it can literally ruin equipment if not properly installed.
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Dry cell batteries are better than wet cell batteries because the latter could spill battery acid in your car if they leak. Dry cell batteries do not contain battery acid. Cars were never meant to hold 10 speakers bass and vocal and as such, cars are ill equipped to deal with the major power demands that come with thousands of watts of power. If your amp does not have a good protect system, it could easily blow because of a silly mistake. Article Info wikiHow is a wiki similar to Wikipedia, which means that many of our articles are written collaboratively.