About the JBL GTX500
Bass it up
Bass it up
Clean bass is the name of the game with JBL's GTX500 mono amp.
Got a nice sub? Give it some serious power by JBL. The GTX500 mono subwoofer amp will send up to 500 watts RMS to your sub, filling your car or truck with powerful bass. A low-pass crossover and bass boost allow you to dial in the best tone for your subwoofer, enclosure, and vehicle.
The GTX500 turns itself on when it senses an incoming signal, so running a remote turn-on lead all the way from your car stereo isn't necessary. The amp also turns itself off about five minutes after the signal stops, so there's no danger of running your battery down. You can switch this feature off if you'd rather use a remote lead.
- mono subwoofer amplifier
- 350 watts RMS x 1 at 4 ohms (500 watts RMS x 1 at 2 ohms)
- Class D amp technology
- frequency response: 20-200 Hz
- variable low-pass filter (45-300 Hz, 12 dB/octave)
- variable bass boost (0-12 dB at 45 Hz)
- signal-sensing turn-on
- preamp and speaker-level inputs (adapters included)
- fuse rating: 25A x 2
- 8-gauge power and ground leads recommended wiring and hardware not included with amplifier
- 8-3/8"W x 2-9/16"H x 9-11/16"D
- warranty: 1 year
- Our 60-day money-back guarantee
- MFR # GTX500
What's in the box:
- Monoblock amplifier with two 25A ATO fuses installed
- 2 Amplifier end caps (installed)
- Two spare 25A ATO fuses
- 2 Speaker wire-to-RCA adapters
- Owner's Manual
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More details on the JBL GTX500
Features & specs
|RMS Power Output (Watts x Channels)||
350 x 1 |
|Peak Power Output (Watts x Channels)||770 x 1|
|Power at 2 Ohms (Watts x Channels)||500 x 1|
|Bridged Power (Watts x Channels)||N/A|
|Minimum Impedance Bridged||N/A|
|Minimum Impedance Unbridged||2|
|Best Frequency Response||10-300 Hz|
|THD at Rated RMS Power||1%|
|Signal to Noise Ratio||80 dB|
|Low-Pass Crossover Frequency||45-300 Hz|
|Low-Pass Slope (dB/octave)||N/A|
|High-Pass Crossover Frequency||N/A|
|High-Pass Slope (dB/octave)||N/A|
|Bass Boost||0-12 dB|
|Bass Boost Frequency||45 Hz|
|Speaker Level Inputs||RCA|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
Power Output: The JBL GTX500 monoblock amplifier delivers the following power output (RMS Power Output @ <1% THD, 14.4 VDC):
- 350 watts x 1 @ 4 ohms
- 500 watts x 1 @ 2 ohms
Protection Circuitry: The amplifier features protection circuitry for thermal overload, over- or under-voltage (<9V or >16V), and short circuits. The LED on the end of the amp glows red if the amp goes into protection mode.
Gain: The GTX500's rotary gain control let you match the amp's input sensitivity to the output of the source unit. The input sensitivity range of the amplifier 100mV - 2V for a low-level input, and 2V - 15V for speaker-level input. A small screwdriver (not included) is required to set the gain.
Input Level: The amp will accept low-level (line level) or high-level (speaker level) input signals. The input level switch lets you select the type of input you are using. For high-level input, there are two settings: Hi1 and Hi2. If the audio system fails to play with an amplifier connected to its output, or you get a "speaker disconnected" message on your factory stereo, set the switch to the Hi2 position. The Hi2 position includes a circuit design to fool this type of factory system into "seeing" a speaker connected to its output.
Crossover: The amp features a low-pass filter that is non-defeatable. It eliminates a range of high frequencies that are sent to the subwoofer. You can adjust the cutoff frequency of the low-pass filter from 45Hz to 300Hz using the rotary control. A small screwdriver is required to adjust the frequency.
Bass Boost: The GTX500 has a variable 0-12dB bass boost, centered at 45Hz. This allows you to dial in the amount of bass according to your personal taste.
Terminals: The JBL GTX500 uses set screw terminals for the +12V power, ground, turn-on (remote) lead, and speaker outputs. The screws can be tightened/loosened with a Phillips-head or flat-head screwdriver (not provided).
Power/Ground: The +12V Power and Ground terminals will accept up to 4-gauge wire. It is recommended that you use a minimum of 8 AWG power wire to the battery, with an in-line 50A fuse installed no more than 18" from the battery terminal. An 8 AWG ground wire (minimum) is also recommended, and attached to a metal area close to the amplifier.
Remote Turn-On: The Remote screw terminal will accept up to 8 AWG wire. Typically, an 18 AWG turn-on lead is included in an amplifier wiring kit.
Speaker-Level Input: The amp includes two bare wire-to-RCA adapters for connecting the amp to a factory radio or aftermarket head unit without preamp outputs. You should attach the left and right speaker wires from the head unit to each adapter and plug the adapter's RCA plug into the amp.
Line-Level Inputs: The amplifier is equipped with one pair of RCA inputs for connecting stereo RCA patch cables from the head unit to the amp. If your source unit only has one subwoofer output, you can connect it to either the left or right RCA inputs on the amp.
Speaker Outputs: The amp features screw terminals for connecting one speaker. The amplifier's minimum speaker impedance is 2 ohms, so you can connect any combination of speakers that presents a 2 ohm load or higher.
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