If you have a car a want to install an active sub, these steps might help you:
-discover first what connections you have RCA or Speaker Input.
-for power you need one positive cable from the battery and one ground (GND-connected to any metal on the body), you could also you the negative from the battery but it is not recommended.
-a sub has a REMOTE cable or jack, this is to turn on the actual device so you can connect it to the REMOTE wire from the player (usually the blue wire marked or already cut) or a second positive wire from the battery but with an On/Off protected switch.
-for the audio: if RCA (White & RED) it just these jacks, but if you have -Left+ / -Right+ you got to check the back of the cd player for the rear speakers output.
-for POWER in total there will be 3 wires, and for audio 2 jacks or 4 wires.
As an example the back connector for the player could be like PIN arranged: 1-------7 (left or right speaker +)
2-------8 (right or left speaker -)
Please check the player owner / service manual for the actual polarity or it will be damaged.
-discover first what connections you have RCA or Speaker Input.
-for power you need one positive cable from the battery and one ground (GND-connected to any metal on the body), you could also you the negative from the battery but it is not recommended.
-a sub has a REMOTE cable or jack, this is to turn on the actual device so you can connect it to the REMOTE wire from the player (usually the blue wire marked or already cut) or a second positive wire from the battery but with an On/Off protected switch.
-for the audio: if RCA (White & RED) it just these jacks, but if you have -Left+ / -Right+ you got to check the back of the cd player for the rear speakers output.
-for POWER in total there will be 3 wires, and for audio 2 jacks or 4 wires.
As an example the back connector for the player could be like PIN arranged: 1-------7 (left or right speaker +)
2-------8 (right or left speaker -)
Please check the player owner / service manual for the actual polarity or it will be damaged.