SP-8ACT (1 ACTIVE 8” SUBWOOFER + 2 PASSIVE 8” SUBWOOFER)
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SUPER POWER AUDIODESIGNED IN ITALY
MMXXVI
One box.
Nothing else to buy.
An 8" active subwoofer with its own 120 W RMS Class AB amplifier and two 6.5" passive radiators. No separate amplifier, no port tuning, no enclosure to build: RCA in, +12 V in, and the low end is there.
Watch it
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Power, measured not promised
BUILT-IN CLASS AB AMPLIFIER 120 W RMS @ 4 Ω · WOOFER RATED 500 W RMS · CONTINUOUS POWER, NOT BURST
Why this box
A 120 W RMS Class AB stage at 4 ohm is built into the enclosure and matched to the woofer at the factory. No separate amplifier, no gain matching, no second power run.
Two 6.5" passive radiators load the 8" woofer and extend the low end without a tuning port — no port noise, and a shorter box than a vented design of the same output.
(224 mm + 270 mm) × 255 × 245 mm. The tapered shape sits against a wheel arch or a boot side wall instead of stealing the middle of the load space.
8" paper cone with a rubber surround, 775 g (28 oz) magnet and a 1.4" (35.6 mm) voice coil at 4 ohm. The woofer alone is rated 500 W RMS: the amplifier never pushes it to its limit.
No port. Two radiators.
They are moved by the pressure of the 8" woofer inside the sealed box. They add cone area and low-frequency output the way a port would, but without a tube: no chuffing at high level, no tuning to get wrong, and the box stays compact.
In the box: SP-8ACT active subwoofer with built-in amplifier.
Not included: power cable, inline fuse holder and RCA cable — installation materials, chosen for your vehicle.
Technical specifications
| BUILT-IN AMPLIFIER | |
|---|---|
| Topology | Class AB, built in |
| Output power | 120 W RMS @ 4 ohm |
| WOOFER | |
| Active driver | 8" (20 cm), 1 unit |
| Cone / surround | Paper cone, rubber surround |
| Magnet | 775 g (28 oz) |
| Voice coil | 1.4" (35.6 mm), 4 ohm |
| Impedance | 4 ohm |
| Rated power | 500 W RMS |
| Max power | 1000 W max |
| ACOUSTIC | |
| Passive radiators | 6.5", 2 units |
| Frequency response | 40 Hz – 600 Hz |
| Sensitivity | 86 ± 2 dB / 1 W at 1 m |
| Max SPL | 107 ± 2 dB / 120 W at 1 m |
| MECHANICAL | |
| Dimensions W × D × H | (224 mm + 270 mm) × 255 × 245 mm |
| Enclosure | Passive-radiator box with built-in amplifier |
MANUFACTURER’S LABORATORY DATA · THE 1000 W FIGURE IS A MAXIMUM, NOT AN RMS RATING · THE AMPLIFIER DELIVERS 120 W RMS
Complete the system
Before you install it
- Inline main fuse within 20 cm of the battery, sized to the cable. The box takes its power straight from the battery: that run must be protected.
- Leave the passive radiators free. The two 6.5" membranes must be able to move: never press luggage, a parcel shelf or foam against them.
- Secure the box. It is a mass moving in a boot. Strap it or bolt it down: an unrestrained enclosure is dangerous under braking.
- 12 V systems only, negative ground. Professional installation is recommended: damage caused by improper installation is not covered by warranty.
Questions installers ask
spaudio@spaudio.it · +39 340 807 8778
Accepted payment methods
Visa · Mastercard · Maestro · American Express · PayPal · Apple Pay · Google Pay · Shop Pay · Klarna
SP Audio — Super Power Audio. Designed in Italy by Audiocar Import & Export SRLS, Milano, official SP Audio distributor for Europe.