2020 Offroad JBL

I'm sound deadening the back wall, and all doors just to quiet it down a little bit. I'm not much of an audio guy, but it occured to me that I might want to swap the 2ohm factor speakers while I'm in the doors.
A little more clarity would be nice, but I know I'm not dealing with much power from the factory JBL setup.

Sound Deadening is happening either way, including behind the factory speakers.

Here is what I am thinking, it comes to $300 from Crutchfield with all the hardware.
Worth doing? I'm not intentionally picking the Powerbass, but that is what seems to fit with good ratings. The Infinities all seem to have tweeters/etc with them that I can't use. I'm open to any other suggestions.

Rockford Fosgate P3SD2-8
Punch Stage 3 shallow 8" subwoofer with dual 2-ohm voice coils

PowerBass OE-692T
6"x9" 2-way car speakers — designed to replace 2-ohm factory speakers

PowerBass OE-652
6-1/2" 2-way car speakers — designed to replace 2-ohm factory speakers

 

You’ll be putting tweeters in the footwell, leaving stock tweeters in place, and not adding any power.

keep the expectations low

 

Yes, I have low expections. I'm assuming that the sound deadening will actually make more of a difference? Which was of course well under $300.

 

Also, I haven't found a decent tweeter to replace the stock ones. I figured i can do that any time without rework, when I figure that out.

I don't really want tweeters in the front doors, and it isn't clear to me if the highs go there anyway?

 

Why can’t you use the Infinity speakers? Because of the included tweeter? Because they won’t fit? I’m unclear on the reasoning here.

As @destin_meeks said, if you’re putting a 2-way speaker low in the door, prepare to be underwhelmed. The Infinity speakers with the separate tweeters will work better for you. The tweeter goes in the dash, behind the grill in the corner. The wiring for each is in the location already. Crutchfield sends adapters that you use to make your speakers fit. The woofer of said set goes down in the door. Yes, do the sound deadening, it will definitely help.

 

I'd like to use the infinity, but I haven't found a model yet that looks like the tweeter will actually fit. Crutchfields website seems to give me different answers everytime that I look.

For Example when I look now for 6x9s that are either 2 or 2.7 Ohm, I also get the following
Infinity Primus PR9613IS -
and
Infinity Primus PR9610cs

This last one seems to include seperate tweeters and I see nothing to indicate that these will actually fit in the dash corners? They do not come up when I look for dash tweeters at all.

 

The tweeter will fit. Crutchfield includes a tweeter adapter plate that you surface mount the tweeter on, then that fits in the dash, should come with adapters for the wiring too. The hard part for the user is to cut/drill out the hole for the tweeter in the adapter plate.

EDIT— found the Canada Crutchfield link to what I’m talking about.
https://www.crutchfield.ca/p_120824201/Metra-82-4201-Tweeter-Mounting-Brackets.html?tp=74487

 

crutchfield looks for exact-fitting speakers. they're very pessimistic. another guy got the recommendation to install 5-1/4" speakers from them in the front doors...

any 6x9 component set will fit.

 

So what would be the general recommendation from someone with some tools, that could make it work?

 

Personally. I’d say something 2-3ohms, like your original plan. Just be open to other options than Powerbass. Please!

 

Did you happen to see my post here?

JBL Speaker Upgrade

Here's another happy camper with the same setup:

https://www.tacomaworld.com/threads/replacing-jbl-factory-amp.767808/page-3#post-27422578

 

Thanks!

 

Is it possible to buy those infinities or the JBL 6x9 without the whole set of tweeters and crossovers that I don’t need?

 

I haven't seen them sold separately. You might try these:

$78 DS18 PRO-SM69.2 6x9 Shallow Water Resistant Cone Mid-Range Loudspeaker 500W Max Power, 250W RMS, 2 Ohms - Perfect for Motorcycle Applications (1 Speaker)

https://www.amazon.com/dp/B08WHTZ14G

Found here

 

This is the best option out there for JBL owners.

 

Seems like something is getting lost here and everyone is focused on impedance matching speakers for the JBL system but there's more to consider.



I get that people focus on impedance, its relationship to power output, and the assumption is that will directly translate into output level. Since it looks like there are selection limitations by only considering low impedance drivers, why wouldn't you explore other options? Isn't it prudent to look at more than low impedance drivers, and consider factors that also affect output level of the speaker to see if this opens up more and possibly better quality options?

I've never gotten my hands on the Toyota JBL system or I'd have my own measurements, but I don't. So, I poked around and granted, this is from 2010, but overall it gives you an idea of the power and crossover architecture of the JBL system. I don't know if it's still the same, I'd like to say yep this is totally good info, but it could be outdated. Regardless, you can read the full post:

https://www.toyotanation.com/threads/toyota-jbl-system-specs.392031/

So we look at the available power and the filters applied and for myself, if I was in this situation, I would be searching diligently for something complimentary. Unless you are going to replace the JBL amplifier and head unit, these are pretty much set in stone parameters that you have to work with, so the drivers you choose need to perform within these crossover settings and available power. What they don't really need to do is match the OEM impedance parameters, because what I haven't seen ANYONE mention is that speaker sensitivity is equally as important, and possibly more so.

So if you reference the "Watts to dB" table above you can see, as an example, that 16W gets you 102dB with a 90dB sensitivity speaker. I looked at the 3 1/2" JBL coaxials linked earlier in this thread and the listed sensitivity for that speaker is 89dB. So at 2 Ohms you get "89dB with 1 Watt". Run all the way up to the power threshold of the amplifier, this translates into about 101dB on this low impedance speaker.

What if there was a much better speaker, only its impedance is 4 Ohm but sensitivity is at 92dB+? Essentially, it matches the JBL SPL output, reaching 101dB at 8 Watts.

I think there is a perfect alternative to this hodge-podge Infinity/JBL Club/PowerBass stuff, and the path isn't considering only low impedance speakers.