STINGER SPX700X4 Marine & Powersports 4-Channel 700W Class D Micro Amplifier

Powerful, Compact, and Ready for the Elements

The STINGER SPX700X4 is a four‑channel, 700W class D amplifier designed for marine and powersport use. Its compact footprint hides substantial capability, with a rugged build that resists salt, fog, and moisture to keep your sound reliable in harsh outdoor environments. Expect crisp highs, solid midrange, and room‑filling bass without a bulky enclosure.

Compact durability with full‑size performance

At only 8.1” long, 4.73” wide, and 1.6” tall, this chisel‑thin chassis fits tight installations in boats, UTVs, ATVs, motorcycles, side‑by‑sides, and other off‑road setups. A corrosion‑resistant aluminum frame, conformal coating on the PCB, and stainless hardware help minimize the intrusion of salt spray, humidity, and vibration during extended adventures.

Power isn’t sacrificed for size. The SPX700X4 delivers up to 700W RMS across four channels when fed appropriate input and load. For multi‑speaker systems, you can run four channels at 4Ω, or push two channels at 2Ω for amplified clarity in demanding conditions. Bridging a pair unlocks a higher single‑channel output for a powered sub or dedicated bass path.

Flexible inputs, expandable sound

• High‑level inputs allow direct connection to existing speaker wiring for OEM integration.
• Low‑level inputs from a head unit via RCA cables are supported for clean, source‑level signal transfer.
• RCA output enables signal transfer to additional amplifiers without signal loss, making system expansion straightforward.

The internal design includes continuously variable 12dB/octave crossovers (40 Hz–400 Hz) for flexible speaker system tuning. A dedicated sub level remote and a intuitive volume control let you dial in bass and overall level to suit your ride, environment, and listening preference without guesswork.

Installation and use in real life

• Includes a rugged marine‑grade 16AWG harness with quick connectors for fast, tool‑free setup.
• Recommended fuse size is 60A to match the amplifier’s power potential and protect your wiring.
• Ideal for creating a weather‑resilient, high‑margin sound system in boats, ATVs, UTVs, and other off‑road vehicles.

Whether you’re cruising on deck, riding rough trails, or tackling off‑road adventures, the SPX700X4 is designed to deliver strong sound with durable, weather‑ready construction. It’s not a guarantee of performance, but it is a robust option to consider if you want a compact, versatile amplifier that can handle demanding environments while leaving room to grow your audio setup.