Amp ground location question?
#1
Amp ground location question?
Getting ready to install a b2 amp in my 08 Sg. I did search this but didn't find my answer.
I know majority run both positive and ground to battery terminals. I'm curious why run ground to battery? I've read a couple of amp install directions and most state not to extend ground any further than what's supplied. Also noticed that most ground wires are considerably shorter in the amp wiring kits you buy. Witch also state not to extend ground wire. Just looking for some insight on this from the knowledgeable ones. Appreciate the help.
I know majority run both positive and ground to battery terminals. I'm curious why run ground to battery? I've read a couple of amp install directions and most state not to extend ground any further than what's supplied. Also noticed that most ground wires are considerably shorter in the amp wiring kits you buy. Witch also state not to extend ground wire. Just looking for some insight on this from the knowledgeable ones. Appreciate the help.
#2
#4
From another post. Read Fosgates amp install guide it specifically recommends the battery on motorcycle installs.
"It's a resistance issue... resistance = total area of the circuit or wire... with a wire, you can calculate resistance as length X diameter. So, a shorter wire will have less resistance. The basis of the short ground wire is from the early days of car audio where a high powered amp was pushing 200W. The typical power wire was 8ga. Compard to 15ft of 8ga wire the chassis of the car (whaich was quite substantial in the 80s) is of low resistance. Look at where we are today. A modest system has over 1000W and the primary power wire is at least 4ga if not 0ga. At the same time the metal of the car itself has gotten thinner and as such a worse conductor. Length doesn't matter. Resistance does. As long as the ground is of low resistance, there won't be an issue. The same goes for the power wire. If you are looking at using 0ga for the power wire, you will proably get a better ground by going straight back to the battery with the same size cable."
"It's a resistance issue... resistance = total area of the circuit or wire... with a wire, you can calculate resistance as length X diameter. So, a shorter wire will have less resistance. The basis of the short ground wire is from the early days of car audio where a high powered amp was pushing 200W. The typical power wire was 8ga. Compard to 15ft of 8ga wire the chassis of the car (whaich was quite substantial in the 80s) is of low resistance. Look at where we are today. A modest system has over 1000W and the primary power wire is at least 4ga if not 0ga. At the same time the metal of the car itself has gotten thinner and as such a worse conductor. Length doesn't matter. Resistance does. As long as the ground is of low resistance, there won't be an issue. The same goes for the power wire. If you are looking at using 0ga for the power wire, you will proably get a better ground by going straight back to the battery with the same size cable."
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