Stinger SPX350X2 2 Channel 350W Powersports Amplifier
Stinger SPX350X2 2-Channel 350W Class D Powersports Amplifier with IPX-4/5 Weather Resistance
Built for the elements a compact, weather-resistant Class D powersports amplifier delivering 350W bridged into boats, ATVs, UTVs, motorcycles, and 4x4s where standard car amplifiers won't survive.
Product Overview
The Stinger SPX350X2 is a 2-channel Class D powersports amplifier engineered for use in harsh environments where conventional car amplifiers fall short. With an IPX-4/5 weather-resistant design, weather-resistant PCB, and D-Class MOSFETs, it is built to handle the moisture, dust, vibration, and wide voltage swings encountered in marine, off-road, ATV, UTV, motorcycle, and 4x4 applications.
The unregulated power supply design operates across a wide voltage range (8–16V), making it suitable for applications with non-standard battery systems. An AUX RCA pass-through output allows multiple SPX350X2 units to be daisy-chained from a single audio source, and an included remote volume control knob with mute function provides easy level adjustment.
Features & Benefits
- IPX-4/5 weather-resistant design — moisture, splash, and dust resistant
- Weather-resistant PCB for long-term durability in harsh environments
- Full range Class D amplifier with D-Class MOSFETs
- Unregulated power supply — operates across 8V to 16V
- AUX RCA pass-through output for linking multiple amplifiers from one source
- Included remote volume control knob with mute function
- 12dB/octave Linkwitz-Riley crossover, adjustable 40Hz–400Hz
- Balanced 2-channel RCA input (200mV–12Vrms)
- Diecast endcaps with removable mounting feet
- Compact, low-profile footprint
- Suitable for motorcycles, ATVs, UTVs, boats, marine, and mobile applications
Technical Specs
| Specification | Detail |
|---|---|
| SKU / Part Number | SPX350X2 |
| Brand | Stinger |
| Channels | 2-Channel |
| Class | Class D (Full Range) |
| RMS Power @ 4Ω (Stereo) | 125W RMS x 2 |
| RMS Power @ 2Ω (Stereo) | 175W RMS x 2 |
| RMS Power @ 4Ω (Bridged) | 350W RMS |
| Rated Voltage | 14.4V |
| Operating Voltage Range | 8V – 16V (Unregulated) |
| Preamp Input | 2-Channel Balanced RCA |
| Input Voltage Range | 200mV – 12Vrms (Balanced) |
| Preamp Output | 2-Channel AUX RCA Pass-Through |
| Frequency Response | 20Hz – 20kHz |
| Signal to Noise Ratio | >110dB (CEA Standard) |
| THD+N | <1% |
| Crossover | 12dB/Octave Linkwitz-Riley, 40Hz–400Hz |
| Power / Ground Wire Gauge | 8 AWG |
| Weather Rating | IPX-4/5 |
| Endcaps | Diecast with removable mounting feet |
| What's in the Box | Amplifier, Volume Control Knob, Amplifier Fly Lead Harness, Manual |
Compatible With / Goes Well With
Direct Vehicle Fit:
- Universal — motorcycles, ATVs, UTVs, boats, marine vessels, 4x4 and off-road vehicles
Goes Well With:
- Marine-grade speakers and powersports speakers
- Additional SPX350X2 units (daisy-chainable via AUX RCA output)
- Marine head units with RCA pre-outs
- 8 AWG power and ground wiring kits
- Stinger powersports wiring accessories
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 — though it is not fully waterproof and should not be submerged.
Can I run this amplifier in bridged mono mode?
Yes. The SPX350X2 delivers 350W RMS bridged into 4Ω, 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 you to connect a second (or further) SPX350X2 amplifier directly from the output of the first, distributing a single audio source to multiple amplifiers without additional signal splitting equipment.
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.
What wire gauge do I need to install this amplifier?
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Stinger SPX350X2 2-Channel 350W Class D Powersports Amplifier with IPX-4/5 Weather Resistance
Built for the elements a compact, weather-resistant Class D powersports amplifier delivering 350W bridged into boats, ATVs, UTVs, motorcycles, and 4x4s where standard car amplifiers won't survive.
Product Overview
The Stinger SPX350X2 is a 2-channel Class D powersports amplifier engineered for use in harsh environments where conventional car amplifiers fall short. With an IPX-4/5 weather-resistant design, weather-resistant PCB, and D-Class MOSFETs, it is built to handle the moisture, dust, vibration, and wide voltage swings encountered in marine, off-road, ATV, UTV, motorcycle, and 4x4 applications.
The unregulated power supply design operates across a wide voltage range (8–16V), making it suitable for applications with non-standard battery systems. An AUX RCA pass-through output allows multiple SPX350X2 units to be daisy-chained from a single audio source, and an included remote volume control knob with mute function provides easy level adjustment.
Features & Benefits
- IPX-4/5 weather-resistant design — moisture, splash, and dust resistant
- Weather-resistant PCB for long-term durability in harsh environments
- Full range Class D amplifier with D-Class MOSFETs
- Unregulated power supply — operates across 8V to 16V
- AUX RCA pass-through output for linking multiple amplifiers from one source
- Included remote volume control knob with mute function
- 12dB/octave Linkwitz-Riley crossover, adjustable 40Hz–400Hz
- Balanced 2-channel RCA input (200mV–12Vrms)
- Diecast endcaps with removable mounting feet
- Compact, low-profile footprint
- Suitable for motorcycles, ATVs, UTVs, boats, marine, and mobile applications
Technical Specs
| Specification | Detail |
|---|---|
| SKU / Part Number | SPX350X2 |
| Brand | Stinger |
| Channels | 2-Channel |
| Class | Class D (Full Range) |
| RMS Power @ 4Ω (Stereo) | 125W RMS x 2 |
| RMS Power @ 2Ω (Stereo) | 175W RMS x 2 |
| RMS Power @ 4Ω (Bridged) | 350W RMS |
| Rated Voltage | 14.4V |
| Operating Voltage Range | 8V – 16V (Unregulated) |
| Preamp Input | 2-Channel Balanced RCA |
| Input Voltage Range | 200mV – 12Vrms (Balanced) |
| Preamp Output | 2-Channel AUX RCA Pass-Through |
| Frequency Response | 20Hz – 20kHz |
| Signal to Noise Ratio | >110dB (CEA Standard) |
| THD+N | <1% |
| Crossover | 12dB/Octave Linkwitz-Riley, 40Hz–400Hz |
| Power / Ground Wire Gauge | 8 AWG |
| Weather Rating | IPX-4/5 |
| Endcaps | Diecast with removable mounting feet |
| What's in the Box | Amplifier, Volume Control Knob, Amplifier Fly Lead Harness, Manual |
Compatible With / Goes Well With
Direct Vehicle Fit:
- Universal — motorcycles, ATVs, UTVs, boats, marine vessels, 4x4 and off-road vehicles
Goes Well With:
- Marine-grade speakers and powersports speakers
- Additional SPX350X2 units (daisy-chainable via AUX RCA output)
- Marine head units with RCA pre-outs
- 8 AWG power and ground wiring kits
- Stinger powersports wiring accessories
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 — though it is not fully waterproof and should not be submerged.
Can I run this amplifier in bridged mono mode?
Yes. The SPX350X2 delivers 350W RMS bridged into 4Ω, 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 you to connect a second (or further) SPX350X2 amplifier directly from the output of the first, distributing a single audio source to multiple amplifiers without additional signal splitting equipment.
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.
What wire gauge do I need to install this amplifier?
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.
