Description
4‑Channel Amplifier – High Line Series by Stetsom (HL 800.4)
Key Features:
- High Power Performance: Provides 800 W RMS total — 4×200 W @ 2 Ω or 4×133 W @ 4 Ω — suitable for powering full-range speakers or bridging for subwoofer use.
- High Line Sound Quality: Designed to deliver clean, distortion-free audio with a wide frequency range, supporting both daily listening and competition-level systems.
- Crossover Control: Equipped with adjustable high-pass (HPF) and low-pass (LPF) filters for precise system tuning and speaker protection.
- Efficient & Cool Operation: Class D topology greatly reduces heat build-up, promoting reliable use in enclosed vehicle installations.
- Robust Protection Circuitry: Offers comprehensive defense against overheating, short circuits, and overloads to ensure long-term durability.
- Compact, Durable Package: Rigid chassis with weather-resistant finish fits easily under seats or in trunks without compromising on performance.
Technical Specifications:
| Feature | Description |
|---|---|
| Design | High Line Series 4-Channel Amplifier |
| Model Code | HL 800.4 |
| Brand | Stetsom |
| Amplifier Class | Class D |
| Channels | 4 |
| RMS Output | 4×200 W @ 2 Ω / 4×133 W @ 4 Ω (bridged 2×400 W @ 4 Ω) |
| Frequency Response | 20 Hz – 30 kHz |
| Signal-to-Noise Ratio | > 90 dB |
| THD+N | < 0.05% |
| Crossover Controls | Adjustable HPF / LPF |
| Inputs | RCA (Low-Level) |
| Protection | Thermal, Short Circuit, Overload |
| Installation Type | Compact – suitable for tight or stealth installations |









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