Description
Stinger SPX350X2 2-Channel 350W Class D PowerSports Amplifier with IPX-4/5 Weather Resistance for Marine ATV UTV Motorcycle and Off-Road Applications
The SPX350X2 from Stinger is a 2-channel Class D PowerSports amplifier delivering 125W RMS per channel at 4 ohms stereo, 175W RMS per channel at 2 ohms stereo, and 350W RMS bridged at 4 ohms. The IPX-4/5 weather-resistant design with weather-resistant PCB and D-Class MOSFETs makes it suited to marine, ATV, UTV, motorcycle, and off-road 4x4 applications where conventional car amplifiers are not adequate. An unregulated power supply operates across 8V to 16V, and an AUX RCA pass-through output allows multiple units to be daisy-chained from a single audio source. A remote volume control knob with mute function is included.
Product overview
The SPX350X2 is engineered for the moisture, dust, vibration, and voltage fluctuations encountered in PowerSports and marine environments. The IPX-4/5 rating provides protection against water splashing from any direction and water jets, suited to rain, spray, and wet off-road conditions. The amplifier is not designed for submersion. The weather-resistant PCB provides additional long-term durability in harsh environments.
The unregulated power supply design operates across a wide 8V to 16V range, making the SPX350X2 suitable for boats, ATVs, and motorcycles where charging systems and battery capacities vary beyond standard automotive voltage ranges. The AUX RCA pass-through output allows a second or further SPX350X2 unit to be connected directly from the output of the first, distributing a single audio source to multiple amplifiers without additional signal splitting equipment. The 12dB per octave Linkwitz-Riley crossover is adjustable from 40Hz to 400Hz. Power and ground wiring require 8 AWG cable.
Features and benefits
IPX-4/5 weather-resistant design: IPX-4 provides protection against water splashing from any direction and IPX-5 adds protection against water jets, making the SPX350X2 suited to rain, spray, and wet PowerSports and marine environments. Not designed for submersion.
350W RMS bridged output: Delivers 125W RMS per channel at 4 ohms stereo, 175W RMS per channel at 2 ohms stereo, and 350W RMS bridged at 4 ohms for high-output mono subwoofer or full-range speaker applications.
Class D full range amplifier with D-Class MOSFETs: Class D efficiency reduces heat generation and current draw, suited to the power budget constraints of PowerSports and marine installations.
Unregulated power supply for wide voltage range operation: Operates across 8V to 16V, suited to applications with non-standard or fluctuating charging systems including boats, ATVs, and motorcycles.
AUX RCA pass-through output for daisy-chaining: The AUX RCA pass-through output allows additional SPX350X2 units to be connected in series from a single audio source without additional signal splitting equipment.
Remote volume control knob with mute function: The included remote volume control knob with mute function allows easy level adjustment from a convenient mounting location away from the amplifier.
12dB per octave Linkwitz-Riley crossover: The adjustable Linkwitz-Riley crossover covers 40Hz to 400Hz for flexible high pass and low pass filtering in a wide range of speaker configurations.
Diecast endcaps with removable mounting feet: The compact, low-profile design with diecast endcaps and removable mounting feet allows flexible installation in confined PowerSports and marine mounting locations.
What's in the box
- 1x SPX350X2 Amplifier
- 1x Remote Volume Control Knob
- 1x Amplifier Fly Lead Harness
- 1x Manual
Technical specs
| Specification |
Detail |
| SKU |
SPX350X2 |
| Manufacturer Part Number |
SPX350X2 |
| Brand |
Stinger |
| Channels |
2-channel |
| Class |
Class D, full range |
| RMS Power at 4 ohms Stereo |
125W RMS x 2 |
| RMS Power at 2 ohms Stereo |
175W RMS x 2 |
| RMS Power at 4 ohms Bridged |
350W RMS |
| Rated Voltage |
14.4V |
| Operating Voltage Range |
8V to 16V, unregulated |
| Preamp Input |
2-channel balanced RCA, 200mV to 12Vrms |
| Preamp Output |
2-channel AUX RCA pass-through |
| Frequency Response |
20Hz to 20kHz |
| Signal to Noise Ratio |
Greater than 110dB (CEA standard) |
| THD+N |
Less than 1 percent |
| Crossover |
12dB per octave Linkwitz-Riley, 40Hz to 400Hz |
| Power and Ground Wire Gauge |
8 AWG |
| Weather Rating |
IPX-4/5 |
| Endcaps |
Diecast with removable mounting feet |
Frequently asked questions
What does IPX-4/5 weather resistance mean for this amplifier?
IPX-4 provides protection against water splashing from any direction. IPX-5 adds protection against water jets. For a PowerSports amplifier this means it can handle rain, spray, splashing water, and wet environments, but it is not fully waterproof and should not be submerged.
Can I run the SPX350X2 in bridged mono mode?
Yes. The SPX350X2 delivers 350W RMS bridged into 4 ohms, making it suitable for driving a single subwoofer or full-range speaker in high-output mono applications.
Can I link multiple SPX350X2 amplifiers from one audio source?
Yes. The AUX RCA pass-through output allows a second or further SPX350X2 amplifier to be connected directly from the output of the first, distributing a single audio source to multiple amplifiers without additional signal splitting equipment.
What wire gauge is required to install the SPX350X2?
Stinger specifies 8 AWG power and ground wiring for the SPX350X2. Using undersized wiring will limit power delivery and may cause overheating. Always match or exceed the recommended gauge for your specific installation.
Why does this amplifier use an unregulated power supply?
Unregulated power supplies are better suited to applications with non-standard or fluctuating voltage, common in boats, ATVs, and motorcycles where charging systems and battery capacities vary. The SPX350X2 is designed to operate reliably across 8V to 16V to accommodate these varied power environments.
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