Stinger SPX350X2 2 Channel 350W Powersports Amplifier
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Stinger SPX350X2 2 Channel 350W Powersports Amplifier

SKU: SPX350X2
Sale price
$481.46
Regular price
$534.95
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10%
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Shipping information

We offer fast and reliable shipping options to ensure that your order arrives in a timely manner. Our dedicated team works diligently to process and ship your items as quickly as possible.

Here are some key points to note about our shipping policy:

Standard Shipping

  • Frankies offers a $15.95 flat rate for Australia-wide shipping, no matter how many items you order. Some larger or heavier items may incur an additional fee, which will be communicated to you when your order is processed.
  • While we endeavour to dispatch all orders promptly, please be advised that due to the current national fuel shortages in Australia and the resulting pressure on logistics networks, order processing and dispatch may take up to 7 business days. We are not liable for delays caused by third-party freight carriers or fuel-related logistical disruptions. By placing an order, you acknowledge that delivery timeframes may be extended beyond our standard estimates during this period.

Estimated delivery times:

  • WA, NT, and TAS: currently experiencing longer shipping times
  • Holiday periods (e.g. Christmas): deliveries may be delayed due to increased freight volumes

Express Shipping

  • Express shipping is available and calculated based on your delivery location, as well as the size and weight of your order. To receive an accurate quote, please contact our Albion Park Rail store and request an "express shipping quote." Our team will promptly assist with pricing and availability. Payment for express shipping can be securely arranged over the phone.

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Product features

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.