Our take on the JBL Grand Touring Series GTO1204D

by Ken Nail

Got an urge to get the lows bumping? JBL's GTO subwoofers may just fit the bill. They work great in sealed or ported boxes, so you'll get bass the way you like it. And these compact subs offer a lower profile than most subs so they fit into smaller boxes that save you space.

The GTO1204D 12" subwoofer sports a polypropylene cone, with a big rubber surround that allows plenty of cone movement without sacrificing control. A heavy-duty dustcap reinforces the cone for lows that kick without distortion. A special integrated vent keeps the sub's internal workings cool and improves power handling capability.

Highlights:

12" subwoofer with dual 4-ohm voice coils
polypropylene cone with Hi-roll rubber surround
power range: 50-300 RMS watts (150 watts per coil)
1200 watts peak power
frequency response: 23-400 Hz
sensitivity: 93 dB
mounting depth: 5-1/16"
sealed box volume: 1.00 cu. ft.
ported box volume: 1.75 cu. ft.
Recommended Q-Logic Box Type: 1, 2, 3
warranty: 1 year
Our 60-day money-back guarantee

Priced per speaker

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and specs chart | What’s in the box? | In-depth notes

Features and Specs


Size Loading...	12 -inch
Impedance Loading...	4 ohms
Cone Material Loading...	Polypropylene
Surround Material Loading...	Rubber
Ideal Sealed Box Volume (cubic feet) Loading...	1
Ideal Ported Box Volume (cubic feet) Loading...	1.75
Port diameter (inches) Loading...	4
Port length (inches) Loading...	10
Free-Air Loading...	No
Dual Voice Coil Loading...	Yes
Sensitivity Loading...	93 dB at 2.83 watts
Frequency Response Loading...	23 - 400 Hz
RMS Power Range (Watts) Loading...	50-300
Peak Power Handling (Watts) Loading...	1200
Top Mount Depth (inches) Loading...	5 1/16
Bottom Mount Depth (inches) Loading...	N/A
Cutout Diameter or Length (inches) Loading...	11 1/8
Vas (liters) Loading...	94.47
Fs (Hz) Loading...	24.5
Qts Loading...	0.48
Xmax (millimeters) Loading...	12.5
Parts Warranty Loading...	1 Year
Labor Warranty Loading...	1 Year

Product Research

What's in the box?

Download owner's manual

12" Dual voice coil subwoofer
Self-adhesive foam gasket
Owner's Manual
Technical Data sheet
Warranty card
JBL decal

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features
Specifications

Features

Woofer Cones: The JBL Grand Touring Series woofers feature polypropylene woofer cones with a heavy-duty molded dustcap.

Hi-roll Rubber Surrounds: The woofers feature hi-roll rubber surrounds to provide exceptional cone-edge suspension and long-throw linearity with control and stability at the excursion limits.

Spider: The woofer's progressive spider provides better control at the excursion limits and reduces woofer distortion.

Shallower Design: The Grand Touring Series' new proprietary frame, unique in-board motor structure, and new cone design allow the woofer to be a full inch shallower than equivalent-sized models.

Terminals: The woofer features dual binding post terminals which can accept bare wire, pin connectors, spade lugs, and single banana plugs. Because of the spacing between the + and - terminals, they cannot accept dual banana plugs.

Dual Voice Coil Wiring: The woofer comes with two jumpers which enable the speaker to be wired in different configurations:

Parallel: The woofer comes with the two jumpers installed in a parallel configuration. When the amplifier is connected to the two outside terminals, the woofer will have a 2-ohm load.
Series: To wire the woofer in a series configuration, only one jumper is used, and it connects the two inside terminals together. When the amplifier is connected to the two outside terminals, the woofer will present an 8-ohm load.

Specifications

Recommended Sealed Box Volume: JBL recommends a 1.00 cu/ft sealed enclosure.

Recommended Ported Box Volume: JBL recommends a 1.75 cu/ft ported enclosure. One 4" diameter x 10" long port, tuned at 34Hz, should be used with the 1.75 cu/ft enclosure.

Recommended Bandpass Box Volume: JBL recommends a bandpass enclosure with a 1.00 cu/ft sealed rear chamber and a 1.25 cu/ft front ported chamber. Two 4" diameter x 8" long port, tuned at 62Hz, should be used with this enclosure.

Power Handling: The woofer has two 4-ohm voice coils, and each voice coil can handle up to 150 watts RMS (600 watts peak).

1-7 of 7 items Sort Results By: Date Reviewed | Rating | Helpfulness

5 out of 5

Third times a charm

Written By Schilly, Darrington WA on Saturday, November 03, 2007

I have had two other sets of subs before these and was never satisfied with the bass but now i have finally found some subs that really bump. i put two of these in my bronco II running off a JL audio amp and it hits so hard it blurs my vision driving down the road. Also, with these subs you don't have to worry about distortion because i have ran them at max power and still heard no distortion. I have set off car alarms of cars parked on the side of the street when i drive by. Ever since i put these in my car people are always asking me to come play music at partys or whatever, even at our last homecoming dance the DJ's were so bad we went outside and everybody danced around my car. bottom line: buy two of these subs and hook them up with a powerful amp and put them in a dual ported box. It is an almost unbeatable bass combination if you want brag worthy bass.

6 out of 7 people found this helpful