Accidental audio improvement with dash speakers and Alpine system

Pdiehm

Well-Known Member
First Name
Paul
Joined
Dec 25, 2019
Messages
186
Reaction score
70
Location
Newark, DE
Vehicle(s)
2018 Jeep Wrangler Unlimited Sahara
Occupation
AML Investigator
I used JL Audio C2 350x 3.5” in the SB from Amazon. I think I got them for $90 at the time, so might want to shop around. Here is the link below.

Just ordered a 8” sub today from Crutchfield to complement the factory premium sub. Will be the next audio project. Thought I was done with audio for now, but no.... never really done.

https://www.amazon.com/dp/B009O70KZU/ref=cm_sw_r_sms_api_i_ZdGjFb838YP27
i thought about replacing the sub with a Fosgate but the alpine isn’t bad.

did you need the metro adapters for the JL’s?

what kind of trimming is needed for the dash with the reference? I know these are clearer but not as much bass as the JL or Kenwoods?





Advertisement

 

RSK

Well-Known Member
Joined
May 16, 2019
Messages
73
Reaction score
50
Location
SC
Vehicle(s)
2016 Jeep Wrangler 75th 2015 Jeep Renegade 2020 Jeep Gladiator Rubicon
i thought about replacing the sub with a Fosgate but the alpine isn’t bad.

did you need the metro adapters for the JL’s?

what kind of trimming is needed for the dash with the reference? I know these are clearer but not as much bass as the JL or Kenwoods?
The 3.5” take the same Metra 72-7902 in the dash and SB, so you will need two pairs. Standard smaller plastic end trim tool will work for the dash cover plate, they pop right up. I had to put a very slight bend in the Infinity ears where the screws go with pliers to match the screw holes in the dash. Nothing to it and they fit fine. The dash cover plate snaps right back in. I put polyfil in both dash locations and the 4” mid spkers that wasn’t replaced. Poly won’t fit in SB 3.5” location with the JL’s, the JL’s max out the space. I didn’t use bass blockers because they made a popping sound when I turned on/off the ignition. Mine have been working fine without bass blockers for 8 months now.

Yes, better high and clear on the Infinity in the dash. Better mid-base in the JL’s IMO. No idea on Kenwood’s, never tried them but others like them too. Keep us posted out how it turns out.

Note: The JL’s will be tight and you have to attach the Metra adapter and finagle the wire & connecter in the small recessed opening at the top of the compartment on the sponge side, but they do fit once you find the orientation. See below.
1596336961595.jpeg

https://www.crutchfield.com/S-Fj3lr2Tu3NM/p_120727902/Metra-72-7902-Speaker-Wiring-Adapters.html
 
Last edited:

ChaosJeep

Member
First Name
Patrick
Joined
Apr 20, 2020
Messages
24
Reaction score
10
Location
Corpus Christi
Vehicle(s)
2020 Jeep JL Unlimited
I put the infinity 3032s in dash. They sound great. Ordered some JL C2 350 for the sound bar. I want some THUMP but the alpine sub is okay. Curious to see what people have done as far as subs go with the alpine system
 

Rubi VT

Well-Known Member
First Name
Mike
Joined
Oct 28, 2019
Messages
160
Reaction score
162
Location
Vermont
Vehicle(s)
2020 JLUR
Thanks for starting this - RSK, nice job!!

One thing i thought i would add to the discussion is OHMS !! Both the 3.5 inch speakers (the dash and the sound bar) are 4 ohm speakers and both the 4 inch speakers (knee panel and sound bar) are 2 ohm. So replacing the 3.5's is easy because MOST aftermarket speakers are 4 ohm. Its the 4 inch ones that get tricky. If you replace a 2 ohm speaker with a 4 ohm speaker you create a couple problems. Will it work - yes but - if the speakers are the same or similar sensitivity then the 4 ohm speaker will be much softer (not by half but) much softer than the 2 ohm speaker. Also you create a much greater DRAW on the amp and can have over-heating problems and ultimately burn out the amp.

I Think what Jeep did here was run a 4 channel 3 ohm amp. 1 Channel for front driver corner = 1 tweeter-mid / 1 bass mid and so on.

Point being just replacing either of the 4 inch speakers with a 4 ohm aftermarket is a problem and will not sound right. Same thing with trying to replace the knee panel speaker or the sound bar speaker with a 6.5 or 6.75 speaker. You need to run them as components and you need to match impedence .

good luck...
 

jeepingib

Well-Known Member
First Name
Dusty
Joined
Jun 26, 2018
Messages
1,218
Reaction score
3,378
Location
College Station, TX
Vehicle(s)
18' JLUR Punk'n
Thanks for starting this - RSK, nice job!!

One thing i thought i would add to the discussion is OHMS !! Both the 3.5 inch speakers (the dash and the sound bar) are 4 ohm speakers and both the 4 inch speakers (knee panel and sound bar) are 2 ohm. So replacing the 3.5's is easy because MOST aftermarket speakers are 4 ohm. Its the 4 inch ones that get tricky. If you replace a 2 ohm speaker with a 4 ohm speaker you create a couple problems. Will it work - yes but - if the speakers are the same or similar sensitivity then the 4 ohm speaker will be much softer (not by half but) much softer than the 2 ohm speaker. Also you create a much greater DRAW on the amp and can have over-heating problems and ultimately burn out the amp.

I Think what Jeep did here was run a 4 channel 3 ohm amp. 1 Channel for front driver corner = 1 tweeter-mid / 1 bass mid and so on.

Point being just replacing either of the 4 inch speakers with a 4 ohm aftermarket is a problem and will not sound right. Same thing with trying to replace the knee panel speaker or the sound bar speaker with a 6.5 or 6.75 speaker. You need to run them as components and you need to match impedence .

good luck...
It's even crazier than that with the factory Alpine upgraded audio amp. It has a 12 channel amp. One channel goes to each speaker separately with a crossover built in for separation. So there are 8 of the channels figured out by the 2 speakers at the four corners, and the last 4 channels all go to the sub. The sub is a odd unit to be sure. Quad voice coil at 2 ohms each. And each is run on it's own channel.
 

RSK

Well-Known Member
Joined
May 16, 2019
Messages
73
Reaction score
50
Location
SC
Vehicle(s)
2016 Jeep Wrangler 75th 2015 Jeep Renegade 2020 Jeep Gladiator Rubicon
I put the infinity 3032s in dash. They sound great. Ordered some JL C2 350 for the sound bar. I want some THUMP but the alpine sub is okay. Curious to see what people have done as far as subs go with the alpine system
Here is what I did to my Gladiator (link below on post#62) adding a Kicker HS8 Hideaway powered sub to complement the less powerful Alpine Premium sub. It was a pretty good improvement without adding an amp yet. I know I will have to do it at some point through and get the most out of the speakers as Rubi VT highlighted. I didn’t know about the ohm differences and the system sounds pretty good now, however I know it’s not what it could be yet. It’s a process for sure and like having a BOAT (‘Bout Another Thousand) every step you take to improve.

#getting there slowly

https://www.jeepgladiatorforum.com/forum/threads/premium-subwoofer-upgrade.29422/post-544633
 

Pdiehm

Well-Known Member
First Name
Paul
Joined
Dec 25, 2019
Messages
186
Reaction score
70
Location
Newark, DE
Vehicle(s)
2018 Jeep Wrangler Unlimited Sahara
Occupation
AML Investigator
I put the infinity 3032s in dash. They sound great. Ordered some JL C2 350 for the sound bar. I want some THUMP but the alpine sub is okay. Curious to see what people have done as far as subs go with the alpine system
did you put the C2 350’s in? How do they sound?
 

Rdmitch

Well-Known Member
First Name
Ross
Joined
Jan 13, 2019
Messages
767
Reaction score
829
Location
Elyria, Ohio
Vehicle(s)
2020 JLUR, ford transit 250, 2017 Wrangler Smoky Mountain Edition
Occupation
Mechanical designer /contractor and musician
They sound good. Definitely a tight fit. But I believe the 3032’s in the dash were the biggest improvement.
the are a big help for the fronts, now i am looking to find something for the sound bar. Any suggestions ?
 

treoguy

Well-Known Member
First Name
Chris
Joined
Jun 22, 2020
Messages
109
Reaction score
163
Location
Long Island, NY
Vehicle(s)
2018 Jeep Wrangler JL Sahara
I'm also looking to upgrade the speakers on my Alpine Premium system and had a few questions.
  1. Is there any advantage to the Infinity 3022 vs the 3032?
  2. Installing the Infiniti in the dash just requires bending the bracket with needle nose pliers to fit.
  3. If using the JL 350s in the soundbar, is there any drilling required? I did note that some mentioned it's a tight fit.
  4. Confirming I'd new two sets of these Metra 72-7902
Thanks in advance.
 

RSK

Well-Known Member
Joined
May 16, 2019
Messages
73
Reaction score
50
Location
SC
Vehicle(s)
2016 Jeep Wrangler 75th 2015 Jeep Renegade 2020 Jeep Gladiator Rubicon
I'm also looking to upgrade the speakers on my Alpine Premium system and had a few questions.
  1. Is there any advantage to the Infinity 3022 vs the 3032?
  2. Installing the Infiniti in the dash just requires bending the bracket with needle nose pliers to fit.
  3. If using the JL 350s in the soundbar, is there any drilling required? I did note that some mentioned it's a tight fit.
  4. Confirming I'd new two sets of these Metra 72-7902
Thanks in advance.
1) Cant speak for the 3032, but very happy with the 3022’s (11 months and still sound great)
2) Correct, slight bend to fit the screw angle. Can’t tell after putting back on the cover plate.
3) No drilling, just tight.
4) Correct 2 pair per package and would need 2 packs (total of 4 adapters).

It’s an easy swap to change the 3.5’s. I used some polyfil too. Not sure if it helps or not, but think it does. No bass blockers for my install.
 

treoguy

Well-Known Member
First Name
Chris
Joined
Jun 22, 2020
Messages
109
Reaction score
163
Location
Long Island, NY
Vehicle(s)
2018 Jeep Wrangler JL Sahara
1) Cant speak for the 3032, but very happy with the 3022’s (11 months and still sound great)
2) Correct, slight bend to fit the screw angle. Can’t tell after putting back on the cover plate.
3) No drilling, just tight.
4) Correct 2 pair per package and would need 2 packs (total of 4 adapters).

It’s an easy swap to change the 3.5’s. I used some polyfil too. Not sure if it helps or not, but think it does. No bass blockers for my install.
Awesome, thanks for help throughout the thread and the quick reply. I ordered the 3022s, the JL 350s and two of the Metra adapters. Will report back once installed.
 

MacJack

Well-Known Member
First Name
-O)|||||(O-Jack
Joined
Aug 9, 2018
Messages
549
Reaction score
333
Location
Western NC
Vehicle(s)
2018 Rubicon JL 2 Door
Vehicle Showcase
1
Awesome, thanks for help throughout the thread and the quick reply. I ordered the 3022s, the JL 350s and two of the Metra adapters. Will report back once installed.
So let me get this straight... Infinity 3022 in the dash and JL 350 in sound bar as I have a 8.4 Alpine Premium System ( https://www.amazon.com/Audio-C2-350...child=1&keywords=JL+350&qid=1605565572&sr=8-1 )

PLUS 4 Metra 72-7902 Speaker Wiring Adapters ( https://www.crutchfield.com/p_120727902/Metra-72-7902-Speaker-Wiring-Adapters.html ) I know It seems that I'm anal but helping others get it right.
 
  • Like
Reactions: RSK

Wightmn

Well-Known Member
First Name
Ted
Joined
May 20, 2018
Messages
89
Reaction score
188
Location
Olathe, KS
Vehicle(s)
2019 JLUR
So let me get this straight... Infinity 3022 in the dash and JL 350 in sound bar as I have a 8.4 Alpine Premium System ( https://www.amazon.com/Audio-C2-350...child=1&keywords=JL+350&qid=1605565572&sr=8-1 )

PLUS 4 Metra 72-7902 Speaker Wiring Adapters ( https://www.crutchfield.com/p_120727902/Metra-72-7902-Speaker-Wiring-Adapters.html ) I know It seems that I'm anal but helping others get it right.
You need 4 of the Metra 72-7902 adapters? Crutchfield's site says the 7902 doesn't work for the roll bar (assuming sound bar) and recommends the 72-614. Which is correct?
 

MacJack

Well-Known Member
First Name
-O)|||||(O-Jack
Joined
Aug 9, 2018
Messages
549
Reaction score
333
Location
Western NC
Vehicle(s)
2018 Rubicon JL 2 Door
Vehicle Showcase
1

Advertisement




Tazer JL - Z Automotive
 



Advertisement
Top