Aftermarket amp and sub install question.

Hey everyone,

I have a 2nd gen Sequoia with the JBL system. I'm installing an aftermarket amp and sub and have 2 questions that I hope someone can help me with.

1.) There are only 2 channels coming from the stock HU going to the amp and then all 14 speaker outputs leave the amp. To tap the LoC is it better to tap before or after the amp?

2.) Since I'm keeping the stock HU I need a LOC. It's between a LC2i or a JL LoC-22. Is the LC2i necessary (bass correction / roll-off) or will the JL work? On JLs page they say this about bass correction;

"Why does the LoC™ 22 not offer a bass correction feature to combat the bass limiters found in many factory audio systems?

Bass correction features rely on an estimate of the factory volume setting, based on the signal level present at the inputs of the LOC. This is an inexact method when playing music that is not only dynamic in nature, but also varies widely in average level from one recording to another. We find that these correction circuits can result in erratic bass correction behavior.

A better approach is to find the volume setting at which the factory audio system begins to limit bass, and then set up the audio system's gain structure so that it plays loudly at or below that level. This neatly sidesteps the factory audio limits without any erratic effects. Most factory systems remain linear to about 75% of their volume range, so adjusting the system gains for lots of loud, clean output at 75% volume will accomplish the task."



Thanks in advance for any help coming my way!

 

Hmm.. I'm not sure if this applies to your specific amp/head unit package but here's a link that might be what you're looking for in regards to your first question.

https://www.tundras.com/threads/amp-wiring.40096/

As for the second question, that's a tough call. Both companies are legit and they know what they are doing but offer two different approaches for the same purpose. The Audio control has been the go to Loc for as long as I can remember so I'd lean towards that one.

I definitely wouldn't have any concerns with using the jl loc either, though.
Ehh.. Hell, I dunno.

 

You are probably better off with the

$295 Rockford fosgate dsr1 8-Channel Interactive Signal Processor w/Integrated iDatalink Maestro Module

Rockford fosgate dsr1 If you have the jbl.
The JL fix86, has bass correction but I believe you would need the JL twk as well since you have the jbl.
I would get ahold of James at tech12volt@gmail.com and he will set you up.