GT4-12 - Subwoofer JBL - Free user manual and instructions
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| Product Type | Subwoofer |
| Brand | JBL |
| Model | GT4-12 |
| Speaker Size | 12 inches (30 cm) |
| Peak Power Handling | 1200 Watts |
| RMS Power Handling | 400 Watts |
| Impedance | 4 ohms |
| Sensitivity | 92 dB (1W/1m) |
| Frequency Response | 25 Hz - 200 Hz |
| Mounting Depth | 6.3 inches (160 mm) |
| Cutout Diameter | 11.1 inches (282 mm) |
| Recommended Enclosure Sealed | 1.25 cu. ft. (35.4 L) |
| Recommended Enclosure Ported | 2.0 cu. ft. (56.6 L) with 4" port |
| Voice Coil | Dual 2 ohm or Dual 4 ohm (depending on version) |
| Cone Material | Polypropylene with rubber surround |
| Basket | Stamped steel |
| Dimensions (Diameter x Depth) | 12.5 x 7.1 inches (318 x 180 mm) |
| Weight | 12.5 lbs (5.7 kg) |
| Power Handling (Continuous) | 400 Watts RMS |
| Power Handling (Peak) | 1200 Watts |
| Magnet Weight | 100 oz (2.8 kg) |
| Warranty | 1 year limited |
Frequently Asked Questions - GT4-12 JBL
What is the RMS power handling of the JBL GT4-12 subwoofer?
The RMS power handling is 400 Watts, with a peak of 1200 Watts.
What is the recommended enclosure size for the GT4-12?
For a sealed enclosure, use 1.25 cu. ft. (35.4 L). For ported, use 2.0 cu. ft. (56.6 L) with a 4-inch port.
What is the mounting depth of the JBL GT4-12?
The mounting depth is 6.3 inches (160 mm).
Is the JBL GT4-12 compatible with a dual voice coil?
Yes, the GT4-12 features a dual voice coil, available in 2 ohm or 4 ohm versions.
What is the sensitivity of the GT4-12?
The sensitivity is 92 dB (1W/1m).
What is the frequency response range of the GT4-12?
The frequency response is 25 Hz - 200 Hz.
Can I use the GT4-12 in a free-air (infinite baffle) setup?
It is not recommended; the GT4-12 is designed for enclosed installations (sealed or ported).
What size cutout is needed for the GT4-12?
The cutout diameter is 11.1 inches (282 mm).
Does the JBL GT4-12 come with a grille?
No, the subwoofer is typically sold without a grille; you may need to purchase one separately.
What is the warranty period for the JBL GT4-12?
JBL offers a 1-year limited warranty for this subwoofer.
User questions about GT4-12 JBL
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USER MANUAL GT4-12 JBL
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Product information
Brand : JBL
Model : GT4-12
Category : Subwoofer