Description
49L7X81 – 8" SoloX® L7X™ Competition Subwoofer (1Ω DVC, 400–800W RMS)
The KICKER SoloX L7X is the company's most advanced bass platform, designed for extreme power handling, long excursion, and field-serviceable recones. The 8-inch 49L7X81 brings that technology to a compact footprint, delivering serious low-frequency performance from smaller enclosures and tighter spaces where big-box subs simply do not fit.
Overview
SoloX DNA in a Compact 8-Inch Package
The 49L7X81 brings SoloX® L7X™ engineering to the 8" class, using a high-mass ferrite motor and long-excursion suspension to deliver deep, authoritative bass from an enclosure as small as 0.88 ft³ vented. With a recommended 400–800 watts RMS and a 30–100 Hz response range, this sub is built to hit hard where space is limited but performance expectations remain high.
A 2.5" (62.5 mm) voice coil with extended winding works in concert with a precision motor and suspension design to translate amplifier power into real low-frequency output—ideal for compact daily systems, small demo builds, and tight installs that still demand true SoloX-level performance.
- Purpose-built high-mass ferrite motor for compact, high-output 8" performance.
- 30–100 Hz response range when used in a properly tuned enclosure.
- Optimized for 400–800 watts RMS in a 1Ω DVC configuration.
Construction
Built Like a Big Sub, Sized for Tight Spaces
Even at 8", the SoloX L7X platform keeps the heavy-duty construction: a cast-aluminum basket, precision motor, and a double-pressed cone with a robust surround. KICKER's square cone geometry and meticulous suspension design help the 49L7X81 deliver high excursion and control in a small frame.
- Double-pressed cone structure for strength and stiffness in an 8" form factor.
- UV-resistant surround engineered for long throw and durability.
- Cast basket structure designed for rigidity and motor alignment.
What Sets SoloX® L7X™ 8" Apart
Key Design Highlights
Motor & Moving Assembly
2.5" Voice Coil & Long-Throw Geometry
The 49L7X81 uses a 2.5" (62.5 mm) diameter voice coil with a 1-7/8" (48 mm) winding width and a carefully engineered top plate and gap structure. Combined with a top plate thickness of 5/16" (8 mm) and an Xmax of 15/16" (24 mm), the result is a long-throw 8" driver capable of serious displacement for its size.
- 2.5" (62.5 mm) voice coil with extended 1-7/8" (48 mm) winding.
- Top plate thickness of 5/16" (8 mm) for precise gap geometry.
- 15/16" (24 mm) one-way Xmax for long-stroke performance.
- Motor and suspension tuned for 30–100 Hz operation in the right enclosure.
Cooling & Reliability
Engineered for Real-World Heat Management
Heat is a critical factor even in smaller subs. The SoloX L7X 8" motor and basket are designed to promote airflow and heat dissipation, allowing the 49L7X81 to make the most of its 400–800 watt RMS power window without sacrificing reliability.
- High-mass motor structure to distribute and manage heat.
- Airflow paths around the coil and motor for improved cooling.
- Designed for sustained use at rated power in properly tuned enclosures.
Wiring & Connectivity
1Ω Dual Voice Coils for Flexible System Design
The 49L7X81 uses a 1Ω dual voice coil (DVC) configuration, targeted at compact high-power amplifiers and multi-sub setups where low-impedance wiring is beneficial. This makes the 8" SoloX a strong choice for systems that mix multiple drivers while still wanting to keep enclosures small.
- 1Ω DVC configuration for flexible wiring options with modern amplifiers.
- Supports series and parallel wiring schemes for single or multiple drivers.
- Optimized for 400–800 watts RMS per driver in well-planned systems.
Installation Footprint
Small Cutout, Serious Output
With a mounting cutout of 7-5/16" (18.6 cm) and a mounting depth of 7-15/16" (20.1 cm), the 49L7X81 fits into compact enclosures while still maintaining the motor depth and travel it needs to behave like a much larger subwoofer in the right box.
- Mounting cutout: 7-5/16" (18.6 cm).
- Mounting depth: 7-15/16" (20.1 cm).
- Designed for compact high-performance vented enclosures.
| Model | KICKER SoloX® L7X™ 49L7X81 – 8" Competition Subwoofer |
| Size | 8" (20 cm) |
| Rated Impedance | 1Ω DVC (dual 1-ohm voice coils) |
| Recommended Amplifier Power | 400–800 watts RMS |
| Frequency Response | 30–100 Hz |
| Magnet Diameter | 6-15/16" (17.6 cm) |
| Total Magnet Weight | 225 oz (approx. 6.4 kg) |
| Voice Coil Diameter | 2.5" (62.5 mm) |
| Voice Coil Winding Width | 1-7/8" (48 mm) |
| Top Plate Thickness | 5/16" (8 mm) |
| Xmax (One-Way) | 15/16" (24 mm) |
| Mounting Cutout Diameter | 7-5/16" (18.6 cm) |
| Mounting Depth | 7-15/16" (20.1 cm) |
| Basket | Engineered high-strength basket structure |
| Cone / Surround | High-strength cone with UV-resistant surround |
| Cooling | Forced-Air Cooling™ motor design |
| Vented Box Volume | 0.88 ft³ (25 L) |
| Port Opening | 2" x 9" (5 x 23 cm) |
| Port Length | 32.25" (82 cm) |
| Tuning Frequency | 39 Hz (approximate) |
The SoloX L7X 8" is designed for high-output performance from a compact vented box. For best results, follow the recommended net volume and port dimensions, and use solid, well-braced construction appropriate for competition-grade subwoofers.
Additional Data
Engineering Resources
- Thiele/Small parameters for 49L7X81 (manufacturer specification set).
- CNC cutout files for L7X baffle design (L7X.DXF and L7X.SLDPRT).
- 49L7X8 dimension sheet for detailed mounting and cutout measurements.
Even in an 8" size, this SoloX L7X is intended for serious systems. Proper amplifier matching, electrical support, enclosure design, and installation technique are critical. Professional installation is strongly recommended for best performance and reliability.