So I took it to my local car stereo shop and they’re trying to charge me $380 to replace my 4G power and ground to 0G, bass control knob, and to put the new amp in. Feel like they’re playing me, I was charged $200 to put everything in last time I came in which was a fair price because they provide the wiring. Is 380 a ridiculous price or should I pay it
It is a ridiculous price to me, but if you can't do it, then what other option do you have? (IMO stereo stuff, falls right in line with HVAC, plumbing, and electrical. There's a ton you COULD learn, but 95% of people could learn everything they would need to know in a couple of hours tops. Since most people don't know A FEW simple things or how little there really is for the basics, the professionals can charge A LOT more than they should be able to).
You would:
* measure those cables you have and buy the same length or a little longer in 0awg (if that's where you want the new amp to be),
* add a lug to the cables at the battery end, and find a way to make it fit to your battery,
* Run the power cable where you have it now, & add an inline fuse near or on the batt,
* Run your ground cable from amp to "ends at chassis" secured with a lug.
* On the amp, install: new power, ground, and swap remote and speaker wires at amp,
* securely mount the amp,
* set the gain, and
* route your amp's new remote knob to where you want it, and mount it.
It's probably 30 minutes to an hour worth of work, probably $40-$50 for cable and lugs, and a $20-$50 crimping tool. I WOULD THINK anyone that didn't have a clue could just watch a few youtube videos, replace what you take out, and figure it out in a couple hours.