Do I need a equalizer?

[KillerKeller40]

This is my first system I have built using and LC2i on a stock radio. I have a 2017 focus st. I have 2 D3400’s, GP elite kit, TS3.5k, 1.5cuft after displacement tunes to 34hz with an X-10v1. Tunes with a DD-1. So my issue is that on some songs the sub will hit and sound amazing. Then I’ll play different songs that I know have bass but I get nothing out of it. Sub is moving like it’s trying to play that note but doesn’t. I know it can hit lower notes cause does on certain songs but others it doesn’t. I’m thinking I might need a equalizer to bring out that lower end frequencies. Please help 

[ToNasty]

If it's just for the sub.  Get a pac lc1

[KillerKeller40]

I have a bass knob that comes win th the amp ? I’m just trying to bring out certain frequencies 

[Charles Phillips]

It sounds like an EQ would help, but with the cost of an LC2i and an EQ, I myself would just get a Pioneer deck with the ability to use a microphone to auto equalize and time delay the source. Otherwise you're going to spend a lot of money trying to fix your stock radio just not being good enough. 

[06RTCharger]

If you dont want to get rid of ur stock headunit, you probably need one of those audio control devices that can sum channels and restore the bass frequencies. I think they call it “accubass”. 

[reedal]

an EQ will not help your stock HU to not filter out lower frequencies.

[mothra]

on the songs that don't play bass try adjusting the accubass setting on the LC2i. what speakers did you tap to get your signal to the LC2i?

[WalledSonic]

One the posters above may have solved your problem with the LCi2, I dont know.  However, this could solve your problem: 

https://pac-audio.com/catalog/audio-interfacing/ap4-fd21

[bcbrassard]

30 minutes ago, WalledSonic said:

One the posters above may have solved your problem with the LCi2, I dont know.  However, this could solve your problem: 

https://pac-audio.com/catalog/audio-interfacing/ap4-fd21

Nice  unit. Lots of features. Cost?

[WalledSonic]

3 minutes ago, bcbrassard said:

Nice  unit. Lots of features. Cost?

$250-300 depending on car, click the link.  My buddy has one in his Jeep and its legit.  Bypasses stock equipment and gives you ADDED hi/mid/low outputs since the signal isnt attenuated at that point in the signal path. 

BL in my sig using the AmPro in a JK Wrangler.