Overview

3-way sound at a strong price

Bring on the big fun of being there live, but leave off the big price tag — that's the idea behind JBL's Concert Series car speakers. Their Concert 631 6-1/2" 3-way speakers deliver a strong sound with a striking design, accented by JBL's "exclamation point" logo on the tweeter. And the speaker's patented Plus One™ structure extends the surface area of the polypropylene woofer cone to give you a better low-frequency experience.

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3-way sound at a strong price

A match for any system

These 3-ohm speakers are sensitive enough that you can power them with an aftermarket stereo, but you'll get even better results feeding them power from an outboard amp.

Grilles are not included; the factory grilles should be suitable for most applications.

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Product highlights:

6-1/2" 3-way speakers (pair)
polypropylene Plus One™ woofer cone with rubber surround
PEI dome tweeter and supertweeter
handles up to 45 watts RMS (135 watts peak power)
frequency response: 55-20,000 Hz
impedance: 3 ohms
sensitivity: 92 dB at 2.83V
top-mount depth: 1-15/16"
grilles not included
warranty: 1 year
Our 60-day money-back guarantee
MFR # SPKCON631FAM

What's in the box:

JBL 631 owner's manual

Two 3-Way speakers
Installation instructions
Template on box

JBL 631 reviews

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136 reviews

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Details

Researched by Crutchfield's Pat M.

Features & specs

General
Speaker Size	6 1/2
Design	3-way
Tweeter Design	Dome
Impedance (Ohms)	3
Tweeter Composition	PEI
Woofer Composition	Polypropylene
Woofer Surround	Rubber
Parts Warranty	1 Year
Labor Warranty	1 Year
Specifications
Sensitivity (1W at 1 meter)	N/A
Sensitivity at 2.83 volts	92
Frequency Response	55 - 20k Hz
Minimum RMS Wattage	---
Maximum RMS Wattage	45
Peak Power Handling (Watts)	135
Top-mount Depth (Inches)	1 15/16
Bottom-mount Depth (Inches)	N/A
Cutout Diameter or Length (inches)	5 1/16
Mounting Height (Inches)	0.601

Product Research

Features

Plus One+ Woofer Cones: Each speaker uses a cone larger than other speakers of the same size. This is accomplished by using a unique basket design and hi-roll surround. The Plus One+ design offers greater bass output and an increase in efficiency.

High-Output Design: The 3Ω voice coil design compensates for the high in-line resistance of small gauge factory wiring, extracting more power from factory (or aftermarket) receivers. This results in clearer, richer sound for the listener.

Mounting: Without an adapter, these speakers fit standard 6¾" applications. Given their required cutout, they will also fit many 6½" applications without an adapter, but new screw holes must be drilled. Please enter your vehicle information to confirm fit.

Accessories

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Q&A

14 questions already asked

Anyone put these in a 3rd gen Tacoma in the rear doors of a double cab? Wonder why Crutchfield doesn't have them for rear doors if the stock ones are 6.5". Any one know?

[ Chris Jul 07, 2022 ]

1 answer

There may be a very small difference in mounting depth, height, etc that would prevent those JBL from showing as being compatible but with your Tacoma. If you give us a call at 800.324.9695 to speak with an advisor we can give you the dimensions of what you are working with for your particular year.

[ Arielle Jul 26, 2022 ] Staff

Can I put 4 of these speakers in my 2004 BMW 325i. Will it have enough power? Rear deck and fronts. Don't have harmon kardon system

[ Jacob May 17, 2022 ]

1 answer

Due to the design of your BMW and crossovers being used to limit frequencies that are sent to speakers, more work may need to be done to make these give the sound you seek. I recommend contacting an advisor by calling 1-800-324-9695 to discuss your goals and get a personal recommendation

[ Paul May 22, 2022 ] Staff

Will it be good size in my mazda 3 2014 hatchback ?

[ Komonyi Kevin Jul 11, 2021 ]

1 answer

This speaker can be installed into the doors of your Mazda and will work as good replacements in some systems for the right preferences. I recommend contacting an advisor by calling 1-800-324-9695 to discuss your specific Mazda 3 along with your goals to get a personal recommendation

[ Paul Jul 17, 2021 ] Staff

If i order this will i get 2 speakers?

[ Komonyi Kevin Jul 11, 2021 ]

2 answers

Yes, it is a pair of speakers...

[ KIMBERLY C. Jul 14, 2021 ]

Yes

[ TYRONE Jul 14, 2021 ]

I hook these up in my 2018 Chevy Silverado, somehow it sounds worst, or alot less bass than the stock speakers. It almost sounds like a bad hookup, i had someone do the installation for me,is it possible that the speaker outputs could be crossed or something?..just dosen't sound right

[ bradley Jun 19, 2021 ]

1 answer

If you purchased the product from Crutchfield, feel free to contact our Tech Support team. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.

[ Krissy Jul 14, 2021 ] Staff

My speaker mounting holes are 9 1/8 inches apart. What are the mounting hole dimensions on this speaker?

[ Ulf Apr 13, 2021 ]

1 answer

Mine are 6 3/16 apart Thanks

[ Jason May 12, 2021 ]

Does the jbl 631 wire direct to my 08 toyota highlander limited oem harness ?

[ Tim Feb 28, 2021 ]

Does the jbl 631 wire direct to my 07 highlander limited oem harness or is an adapter harness avaliable?

[ Tim Feb 28, 2021 ]

4 answers

For my 2008 Silverado I had to get an adapter, I'm assuming you have stock speaker harness going to your speakers so you would need one as well, it should give you the option to add the adapters in your cart as long as you have your vehicle information up to date. The reason for the adapter is the speakers only have 2 male terminals a "negative and positive". If you had put in other speakers after the oems you could just crimp 2 female connectors to your cars wires and plug it in directly.

[ Dominic Feb 28, 2021 ]

Adopter available

[ verlin Feb 28, 2021 ]

You will need an adapter harness. That will be the easiest way to install them

[ TONY Feb 28, 2021 ]

After instillation in a jeep sound bar, can the factory grill be used ?

[ Chris Feb 21, 2021 ]

1 answer

I was not able to use factory grills Thanks

[ Jason Feb 22, 2021 ]

Can you get the grills for these?

[ paul Sep 24, 2020 ]

1 answer

We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question.

[ Calvin Oct 08, 2020 ] Staff

I have a 2007 chevy hhr.. Wanting to replace my 4 door speakers with jbl 631 3way speakers? Advice on new tweeters?

[ Lindsey Aug 28, 2020 ]

1 answer

Great speaker works very well great sound for OEM radio Would use again

[ Jason Aug 28, 2020 ]

What are the electrical terminal sizes for: 1. the positive terminal 2. the negative terminal?

[ Robert Apr 12, 2020 ]

2 answers

I'm sorry I don't know

[ James Apr 23, 2020 ]

One terminal is bigger than the other I think it was the positive side that was the smaller one

[ TYRONE Apr 22, 2020 ]

What car stereo goes best with these speakers?

[ alakai66 Jan 03, 2020 ]

1 answer

Anything will work with them...

[ RTVX1140winch Jan 03, 2020 ]

Ive put the JBL 631 Concert 6x9's in the front door of my 2018 Subaru CrossTrek Premium. Why does it say that these wont fit my car which has stock 6 1/2"'s in the back door? I'd like to keep the same JBL's (Concert series) in front and rear doors. I'm very happy with just the new 6x9's up front - cant wait to do tge rears! Thanks!

[ Mark Dec 30, 2019 ]

1 answer

The limitation is the mounting height. The tweeters on those JBL Concert series 6 1/2" are a bit too tall and will hit the factory grill/ door panel. They are only off by less than 1/10" though so you may be able to make them fit. You can consult with one of our friendly product advisors here: https://www.crutchfield.com/I-rET1c290/S-SUliZgSTXG7/support/ContactUs.aspx

[ Cosmo Jan 10, 2020 ] Staff

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