Focal SUB P 30 DB Car Subwoofer
139,00 €
Focal SUB P 30 DB is a car subwoofer driver intended for a system with an external amplifier and a separate enclosure. Its 300 W RMS rated power helps with amplifier setup, while two 4-ohm voice coils support different wiring arrangements. The model can be installed in a sealed or bass-reflex enclosure. It uses a butyl surround, and decompression in the centering spider ventilates the voice coil.
Focal SUB P 30 DB is a car subwoofer driver designed for installation in a separately selected enclosure. It belongs to the Performance series and has a rated power handling of 300 W RMS. This model is suitable for a system with an external amplifier when you want the flexibility to choose the enclosure type and voice-coil wiring arrangement. It is not an active subwoofer or a complete driver-and-enclosure package.
Construction and purpose
The 2-inch (50 mm) voice coil is wound on a Kapton former. The driver also uses a butyl surround. Decompression in the centering spider provides ventilation for the voice coil. The dual ferrite assembly is specified as measuring 5 11/16 inches (14.5 cm). The subwoofer is described as having high sensitivity.
Choosing an enclosure
The driver can be installed in either a sealed enclosure or a bass-reflex enclosure. A sealed design is generally simpler because it does not require the tuning of a bass-reflex port. A bass-reflex enclosure needs a precisely selected internal volume, port dimensions, and tuning frequency. These parameters must be calculated specifically for this model.
An unsuitable enclosure may restrict the driver’s excursion or alter the intended bass reproduction. It is therefore worth choosing the enclosure type before designing its dimensions and deciding where it will be secured in the vehicle.
Connecting the amplifier
Two separate 4-ohm voice coils provide two connection options: each coil can be connected to a separate amplifier channel, or both coils can be connected to one channel. When separate channels are used, both channels must carry the same signal and use identical gain settings. When both coils are connected to a single channel, the chosen wiring arrangement must remain within the load supported by that channel.
System tuning
Crossover frequency, level, and phase are adjusted on the amplifier or audio processor rather than on the driver itself. Begin with a low gain setting and increase it until the subwoofer forms a clean, balanced combination with the main speakers. Adjust the low-pass filter so that the reproduced frequency ranges blend smoothly.
If phase adjustment is available, compare its settings while sitting in the driver’s seat. Select the position that produces the smoothest bass balance together with the main speakers.
Installation in the vehicle
Secure the enclosure so that it cannot move during braking or changes of direction. Leave clear space around the opening of a bass-reflex port, and do not obstruct it with trim panels or luggage. Before permanently fastening the enclosure, test several orientations in the luggage compartment and listen from the driver’s position.
Technical specifications
| Manufacturer and model | Focal SUB P 30 DB |
|---|---|
| Product type | Car subwoofer driver |
| Series | Performance |
| Rated power | 300 W RMS |
| Enclosure types | Sealed or bass reflex |
| Voice coils | Two 4-ohm coils |
| Voice-coil diameter | 2 inches (50 mm) |
| Voice-coil former | Kapton |
| Surround | Butyl |
| Centering spider | Decompression for voice-coil ventilation |
| Sensitivity | Described as high |
| Ferrite assembly | 5 11/16 inches (14.5 cm), dual |
FAQ
Is this a ready-to-use active subwoofer?
No. It is a separate car subwoofer driver and requires both a suitable enclosure and an external amplifier.
Can each voice coil be connected to a separate channel?
Yes, provided both channels carry the same signal and their gain settings are identical. The amplifier load must also be compatible with the selected voice-coil wiring arrangement.
What does the 300 W RMS rating mean?
It is the rated power figure used when assessing the load applied to the driver. It does not define one mandatory amplifier power rating or a required position for the amplifier’s gain control.
How should I choose the filter and phase settings?
Set the filter so that there is no pronounced overlap with the main speakers. Compare phase and level from the driver’s seat while using the same piece of music for each setting.
How should I choose the enclosure position in the luggage compartment?
Try several orientations and listen from the driver’s seat, as the vehicle interior changes the distribution of low frequencies. If using a bass-reflex enclosure, leave an unobstructed path for air to flow through the port.
