1. Introduction
Thank you for choosing the Gladen RS-X-08 High Performance 8" Subwoofer. This manual provides essential information for the proper installation, operation, and maintenance of your new subwoofer. Please read this manual thoroughly before installation and keep it for future reference.
The Gladen RS-X-08 is designed to deliver powerful and precise bass reproduction, enhancing your audio experience. It features a robust construction with a vented die-cast basket, black Nomex spider, paper cone, and PP-dust cap, ensuring durability and high performance.
2. Safety Information
- Always disconnect the vehicle's battery before performing any electrical work.
- Ensure all wiring is correctly routed and secured to prevent damage or short circuits.
- Do not expose the subwoofer to excessive moisture or extreme temperatures.
- Use appropriate gauge wiring for power and speaker connections to avoid overheating.
- Consult a professional installer if you are unsure about any installation steps.
- Operating the subwoofer at excessively high volumes for prolonged periods can cause hearing damage.
3. Product Features
The Gladen RS-X-08 subwoofer incorporates advanced design and materials for superior audio performance:
- Cone: Paper for optimal sound reproduction.
- Surround: Foam for flexibility and excursion.
- Basket: Vented die-cast aluminum for rigidity and heat dissipation.
- Spider: Black Nomex for durability and precise cone control.
- Dust Cap: PP-dust cap.
- Voice Coil: Aluminum former.
- Impedance: 4 Ohm nominal impedance.
- Power Handling: 250 Watts RMS / 375 Watts Peak.

Figure 3.1: Front view of the Gladen RS-X-08 Subwoofer, showing the paper cone, foam surround, and Gladen logo on the dust cap.
4. Specifications
| Parameter | Value |
|---|---|
| Speaker Type | Subwoofer |
| Subwoofer Diameter | 8 Inches (20 cm) |
| RMS Power Handling | 250 Watts |
| Peak Power Handling | 375 Watts |
| Nominal Impedance | 4 Ohms |
| DC Resistance (Re) | 3.75 Ohms |
| Resonance Frequency (Fs) | 43.02 Hz |
| Voice Coil Diameter | 2 Inches |
| Xmax | 8mm |
| Moving Mass (Mms) | 99.39g |
| Effective Piston Area (Sd) | 216 cm² |
| Mechanical Resistance (Rms) | 4.79 kg/s |
| Compliance (Cms) | 0.14 mm/N |
| Force Factor (Bl) | 11.35 Tm |
| Equivalent Air Volume (Vas) | 9.02 dm³ |
| External Diameter | 216 mm (8.50 inch) |
| Installation Diameter | 183 mm (7.20 inch) |
| Installation Depth | 104 mm (4.09 inch) |
| Magnet Diameter | 126 mm (4.96 inch) |
| Recommended Enclosure (Vented) | 18 liters |
| Recommended Enclosure (Sealed) | 12 liters |

Figure 4.1: Rear view of the Gladen RS-X-08 Subwoofer, highlighting the vented basket and speaker terminals.
5. Setup and Installation
Proper installation is crucial for optimal performance and longevity of your subwoofer. It is highly recommended to have the subwoofer installed by a qualified professional.
5.1 Enclosure Recommendations
The RS-X-08 is designed to perform well in both sealed and vented enclosures:
- Vented Box: Approximately 18 liters (0.64 cubic feet).
- Sealed Box: Approximately 12 liters (0.42 cubic feet).
Ensure the enclosure is robust, airtight (for sealed), and properly braced to prevent rattles and vibrations.
5.2 Wiring Connections
The RS-X-08 has a 4 Ohm nominal impedance. Connect the subwoofer to a suitable amplifier capable of delivering the required power (250-375 Watts RMS) at a 4 Ohm load.
- Connect the positive (+) terminal of the subwoofer to the positive (+) output of the amplifier.
- Connect the negative (-) terminal of the subwoofer to the negative (-) output of the amplifier.
- Use high-quality speaker wire of appropriate gauge (e.g., 12-14 gauge) for runs up to 10 feet.

Figure 5.1: Close-up view of the Gladen RS-X-08 Subwoofer's cone and foam surround, showing the red stitching detail.
5.3 Mounting
The subwoofer requires an installation diameter of 183 mm (7.20 inches) and an installation depth of 104 mm (4.09 inches). Ensure sufficient clearance behind the mounting surface for proper ventilation and magnet clearance.
6. Operating Instructions
Once installed, follow these guidelines for optimal operation:
- Break-in Period: Allow a break-in period of approximately 20-30 hours of normal listening before pushing the subwoofer to its limits. This allows the suspension components to loosen up and perform optimally.
- Gain Setting: Set the amplifier gain correctly to match the output voltage of your head unit. Incorrect gain settings can lead to distortion and potential damage to the subwoofer.
- Crossover Settings: Use a low-pass filter (LPF) on your amplifier or head unit to send only low frequencies to the subwoofer. A typical LPF setting for an 8-inch subwoofer might be between 60Hz and 100Hz, depending on your system and preferences.
- Subsonic Filter: If your amplifier has a subsonic filter, enable it and set it slightly below your enclosure's tuning frequency (for vented enclosures) or around 25-30Hz (for sealed enclosures) to protect the subwoofer from over-excursion at very low frequencies.
- Volume Control: Avoid prolonged listening at maximum volume levels, especially if you notice any distortion. Distortion indicates that the amplifier or subwoofer is being overdriven.
7. Maintenance
The Gladen RS-X-08 subwoofer requires minimal maintenance:
- Keep the subwoofer clean and free from dust and debris. Use a soft, dry cloth for cleaning.
- Periodically check all wiring connections to ensure they are secure and free from corrosion.
- Avoid spilling liquids on the subwoofer.
- Do not apply excessive pressure to the cone or surround.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from subwoofer |
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| Distorted sound |
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| Weak or muddy bass |
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9. Warranty and Support
Gladen products are manufactured to the highest quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your product or contact your authorized Gladen dealer. Keep your proof of purchase for warranty claims.
For technical support or service inquiries, please contact your local Gladen distributor or visit the official Gladen website for contact information.
Website: www.gladen.com





