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The Morel Primo SL PSL84 is an 8-inch shallow-mount 4-ohm subwoofer rated at 250W RMS (500W max transient), part of Morel's Primo SL range. Its carbon fibre cone and 51mm voice coil are built for compact sealed and vented enclosures where mounting depth is limited.
Key specifications
- Size: 8" shallow mount
- Power handling: 250W RMS, 500W max transient
- Sensitivity: 84.6dB (2.83V/1m)
- Frequency response: 15–500Hz
- Mounting cut-out: 182mm
- Unit diameter: 222mm
- Cone: carbon fibre, shallow design
- Voice coil: 51mm (2in)
- Mounting depth: 80.1mm (3.125in)
Morel Primo SL PSL84
The Primo SL range is precision-engineered for true high-fidelity bass where mounting depth and enclosure volume are severely limited. Rigid carbon-weave cones deliver an exceptional stiffness-to-mass ratio, resulting in fast transient response, low distortion, high output, and natural musical integration.
The PSL84 is optimised to perform with accuracy in both compact sealed and vented enclosures, making it well suited to modern vehicles where space is at a premium. At just 3.125" mounting depth, it fits where traditional subwoofers cannot. The heavy-gauge stamped steel Uniflow™ chassis, large 2-inch voice coil, and rear-vented motor ensure clean, controlled output and thermal stability.
Features
- Engineered for dynamic, efficient and musical bass
- Optimised for extremely compact sealed and vented enclosures
- Exceptional shallow mounting depth of 80.1mm (3.125in)
- High power handling and high excursion
- FEA-perfected cone and suspension geometry for precision performance
- Low air resistance Uniflow™ chassis with thermal venting
- Heavy-gauge steel chassis minimises resonance
- Klippel-optimised performance
Explore the full range in Morel Subwoofers.
Specification
| Overall Dimensions | 8” |
|---|---|
| Power Handling | Wrms 250 |
| Max. Trans. Pwr Handling Wrms | 500 |
| Sensitivity | (2.83 V/1M) dB 84.6 |
| Frequency response | Hz 15-500 |
| Resonance Freq. Fs Hz | 39 |
| Voice Coil | Diameter mm (inch) 51 (2.0) |
| Voice Coil | Height mm (inch) 29.2 (1.1) |
| Voice Coil | Type/Former Aluminum |
| Voice Coil | Wire Copper |
| DC Resistance (ohm) * VC in parallel | 3.6 |
| Voice Coil | Induct. @1 kHz (mH) 1.6 |
| Magnet | System Single magnet vented |
| HE-Magnetic Gap Height mm (inch) | 8 (0.3) |
| BL Product/BXL | 13.8 |
| Max. Linear Ex./Xmax mm (inch) | ±10mm (0.3) |
| Electrical Q Factor QES | 0.59 |
| QTS | 0.53 |
| QMS | 4.96 |
| Moving Mass MMS - gr/os | 136.7 (4.8) |
| Equiv. Can Air Load VAS - L (cu.ft) | 9.3 (0.33) |
| Cone | Type Shallow design cone |
| Cone | Material Carbon Fiber |
| Unit Diameter mm(inch) | 222 (8.74) |
| Mounting Depth | mm (inch) 80.1 (3.125) |
| Mounting Cutout | 182 (7.16) |
More specs
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What's Included
- PRIMO SL PSL84
Morel
About the Morel PRIMO SL PSL84
From our tech experts at CEN
The Morel Primo SL PSL84 is an 8-inch shallow-mount subwoofer rated at 250W RMS (500W max transient), with 4-ohm impedance and an 80.1mm (3.125in) mounting depth. Its carbon fibre cone and 51mm aluminium voice coil are built for compact sealed and vented enclosures. Frequency response spans 15–500Hz, with a sensitivity of 84.6dB.
Who it suits
This suits drivers who need genuine bass where mounting depth or boot space is restricted — saloons, coupés, and custom builds where a standard subwoofer will not fit. The 250W RMS rating pairs well with a modest monoblock amplifier. For higher output in the same 8-inch format, the Morel Ultimo TI 802 steps up to 800W RMS.
Our tech experts advise
Plan your enclosure around the 9.3-litre equivalent air volume (VAS); a compact sealed box works well for this driver. Use a 4-ohm-stable amplifier to match the PSL84's impedance. The 182mm mounting cut-out should be confirmed against your chosen enclosure or vehicle location before installation. Fitting is priced per vehicle — contact us to discuss your installation.
Explore the full Morel range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Morel
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- 1
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More from Morel Subwoofers
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Frequently Asked Questions
Q: What cut-out does the Morel PSL84 need?
A: A 182mm mounting cut-out, with an overall unit diameter of 222mm.
Q: What enclosure suits the PSL84?
A: Primo SL subwoofers are optimised for compact sealed and vented enclosures, making them suited to vehicles where space is limited.
Q: How much power does the PSL84 handle?
A: 250W RMS and 500W max transient power, with 84.6dB sensitivity (2.83V/1m).
Q: What mounting depth does the Morel PSL84 need?
A: Morel quotes a mounting depth of 80.1mm (3.125in), so it suits shallow locations where a standard 8-inch subwoofer will not fit.
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