Ready for a Sound System?
In this instructable, I will show you the whole process of installing a car amplified subwoofer into a house.
This process will work with most Computer ATX power supplies, I will show you how to do this with an aftermarket ATX PSU. Please check the video and picture for an amplifier with 4 channel and 1500 watts linked to a dual sub woofer. This demonstration is for street legal interior thunder bass that rocks your floor and walls.
Whether it’s a weekend road-trip or stay at the lake house, remember to follow some of these energy-saving tips to avoid unnecessary expenses while you’re away.
Step 1: Choosing the right Speaker and Sub Woofer.
So what will we need to do this?
-Subwoofer 4ohms box (Dual Coil Subs)
-2 way speaker 4ohms
-Skytech 4 channel Amplifier
-Wiring kit, Car kits with fuse and wiring
-10 Gauge or thicker, 20 foot insulated wire (for power)
-10 Gauge or thicker, 3 foot insulated wire (for ground)
-18 or 16 Gauge, 15 foot wire
-RCA cables, 15 feet or longer (you need 2 or one with both red and white)
-In-line fuse, 50 amps or higher
-Some speaker wire
-4 small wood screws
For the power and ground wires, you will need thicker wires depending on how powerful the amplifier is. REALLY powerful amps could need as much as a 0 gauge wire. Electronic Car Audio or Retail Stores sells amplifier kits. The kits tell you how many watts they can handle.
Step 2: Choosing an Amp and Sub Woofer.
When looking at speakers and amplifiers, do not look at the peak power. A speaker or amp can only be run on the peak power for about a minute before it goes bad or overheats. You want to be running your subwoofers on its RMS rating rather than the peak rating. For best sound, keep the impedance (Ohms) the same too.
Lets take the Skytech for example. Its ratings are:
-4 Ohm Impedance
Smaller speakers like the 8 and 10 inch ones, are very quick to respond and punch better than bigger ones, but are not very loud. Bigger ones like 15+ inch ones, are very loud compared to smaller ones at the same wattage, but have slow response, and make the sound more mushy. The bigger ones also handle lower frequencies better too. 12 inch speakers are a good compromise for a basic system.
Step 3. Running Wires.
Choosing a size for a speaker is also important. Smaller speakers like the 8 and 10 inch ones, are very quick to respond and punch better than bigger ones, but are not very loud. Bigger ones like 15+ inch ones, are very loud compared to smaller ones at the same wattage, but have slow response, and make the sound more mushy. The bigger ones also handle lower frequencies better too. 12 inch speakers are a good compromise for a basic system.
Run the majority of the power cable through the hole in the firewall, making sure to leave enough wire to get to the PSU.
Strip the insulation off of the wire at the end where the PSU is. Wire the in-line fuse to this end (if it is not part of the wire already). You want the fuse as close to the PSU as possible. Do not connect the wire to the PSU yet. Make sure you tape the place where you wired the fuse to the wire, so you don’t get a short.
Run the remaining wire under the carpet’s or through a wire channel, if there is one. You want to get this wires to the speakers and sub woofer.
While you have the carpeting loose, run the 16 – 18 gauge wire and the RCA cables from the speakers and bass cabin to as close to the PSU unit.
Step 4. Wiring the Audio Cable.
After you have the connection, look at the back of it. There should be 2 or 4 RCA connections. Run the RCA cables through the back of the amplifier and plug them into the computer sound card 3.5 mm jack.
Step 5. Wiring the Amplifier and Remote.
Connect the power + yellow cable and – black cable from the PSU to the connection of the Amplifier Connect the 16 to 18 gauge wire into the PSU and amplifier:
Connect the speaker wire to the + and – marked for speakers on the Amplifier. There may be 2 or 4 channels you can bridge your sub woofer on both channels. Connect the other end of the speaker wire to the + and – on the speaker box. Try to make sure that the + from the amp is connected to the + on the speaker, and the same with the – from the amp.
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