SGRU-6 - Subwoofer JL Audio - Free user manual and instructions
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| Product Type | Marine Subwoofer |
| Size | 6.5 inches |
| Impedance | 4 ohms |
| Power Handling (RMS) | 150 Watts |
| Peak Power Handling | 300 Watts |
| Frequency Response | 45 Hz - 200 Hz |
| Sensitivity | 86 dB (1W/1m) |
| Mounting Depth | 3.4 inches (86 mm) |
| Cutout Diameter | 5.5 inches (140 mm) |
| Overall Diameter | 6.9 inches (175 mm) |
| Weight | 3.5 lbs (1.6 kg) |
| Voice Coil | Single 4-ohm |
| Enclosure Type | Sealed or Ported |
| Recommended Sealed Volume | 0.35 cu ft (9.9 L) |
| Recommended Ported Volume | 0.6 cu ft (17 L) |
| Port Diameter | 2 inches (51 mm) |
| Port Length | 8 inches (203 mm) |
| Weather Resistance | UV-resistant, corrosion-resistant |
| Grille Included | Yes |
| Wiring | Gold-plated terminals |
| Marine Certification | SAE J1455 (vibration, salt spray, UV) |
Frequently Asked Questions - SGRU-6 JL Audio
What is the power handling of the JL Audio SGRU-6 subwoofer?
The SGRU-6 handles 150 watts RMS and 300 watts peak. Match your amplifier's RMS output to avoid distortion or damage.
Can I use the SGRU-6 in a marine environment?
Yes, it is designed for marine use with UV-resistant and corrosion-resistant materials, tested to SAE J1455 standards for salt spray and vibration.
What is the mounting depth and cutout size?
Mounting depth is 3.4 inches (86 mm) and cutout diameter is 5.5 inches (140 mm). Ensure your enclosure or mounting location provides these clearances.
What impedance options are available?
The SGRU-6 has a single 4-ohm voice coil. Wire a single subwoofer to a 4-ohm load, or multiple subwoofers in parallel/series for different loads.
What type of enclosure should I use?
You can use a sealed or ported enclosure. For sealed: 0.35 cu ft (9.9 L). For ported: 0.6 cu ft (17 L) with a 2-inch port 8 inches long. Sealed gives tighter bass, ported extends low-frequency output.
What is the frequency response range?
The frequency response is 45 Hz to 200 Hz. It handles sub-bass and mid-bass effectively. For best results, set a low-pass filter at around 80-100 Hz.
How do I clean and maintain the SGRU-6?
Gently wipe the cone and grille with a soft, damp cloth. Avoid harsh chemicals. Check wiring connections periodically for corrosion, especially in marine use.
Does the SGRU-6 come with a warranty?
JL Audio offers a 2-year limited warranty for marine subwoofers. Warranty covers defects but not damage from abuse, improper installation, or exposure to extreme conditions.
Can I use the SGRU-6 in a car?
Yes, it can be used in cars, but it is optimized for marine environments. The rugged construction works well in vehicles, though it may require a sealed enclosure for best performance.
What is the sensitivity of this subwoofer?
Sensitivity is 86 dB (1W/1m). This means it produces moderate output per watt; use an amplifier with adequate power (at least 150W RMS) for satisfying bass.
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