SP 15XXX Carbon Subwoofer 15" 10000W RMS
Free shipping worldwide. Pay in easy, interest-free installments with Klarna.
SUPER POWER AUDIODESIGNED IN ITALY
MMXXVI
10000 watt RMS.
4 inch voice coil.
A 15"/38 cm subwoofer built around a 4 inch voice coil: rated 4 ohm with 2+2 ohm coils, 10000 W RMS continuous, 20000 W peak, 86.2 dB SPL sensitivity, 18–250 Hz. Compressed paper + fibreglass cone, large “R” form suspension, 280 °C aluminium wire winding, 203.6×5 Oz Y35 ferrite magnet, 60 kg per unit. Sold per unit.
Power, measured not promised
RMS = CONTINUOUS POWER. THE PEAK FIGURE IS A SHORT-TERM VALUE: SIZE THE AMPLIFIER ON THE 10000 W RMS
Why this subwoofer
Not a burst figure: 10000 W RMS is the power the voice coil handles continuously, with 20000 W of peak headroom on top.
The bigger the coil, the more heat it dissipates and the longer it survives a real session. Wound with 280 °C aluminium wire.
Rated impedance 4 ohm with two 2 ohm coils: you choose how to wire them to match your amplifier instead of the other way round.
Compressed paper + fibreglass cone, large “R” form suspension and a 203.6×5 Oz Y35 ferrite magnet: Xmax 25 mm, Bl 48.8 TM, 60 kg on the scale.
Look closer
Wiring of the two voice coils, impedance, mounting and full specifications.
⇩ Open the manual (PDF)PDF · English · 2026
What you receive
- One SP 15XXX subwoofer — the price is for a single unit.
- The full user manual in PDF, linked above, with the wiring diagram of the two voice coils.
- Invoice from an Italian company, shipping from our warehouse in Italy.
- Free technical support from Italy before and after the installation.
Technical specifications
| SUBWOOFER — SPECIFICATIONS | |
|---|---|
| POWER AND LOAD | |
| Nominal diameter | 380 mm (15") |
| Rated impedance | 4 ohm |
| Minimum impedance | 2+2 ohm |
| Rated power (RMS) | 10000 W |
| Peak power (MAX) | 20000 W |
| Sold as | Single unit |
| ACOUSTICS | |
| Sensitivity (1 W / 1 m) | 86.2 dB SPL |
| Frequency range | 18–250 Hz |
| MOTOR AND MATERIALS | |
| Voice coil diameter | 4 inch |
| Winding material | 280 °C aluminium wire |
| Magnet | 203.6×5 Oz Y35 ferrite |
| Suspension | Large “R” form |
| Cone | Compressed paper + fibreglass |
| Weight of one subwoofer | 60 kg |
| THIELE-SMALL PARAMETERS | |
| Fs | 33 Hz |
| Qts | 0.27 |
| Qms | 2.70 |
| Qes | 0.30 |
| Vas | 21.8 L |
| Re | 4 ohm |
| Xmax | 25 mm |
| Mms | 876 g |
| Cms | 0.03 mm/N |
| Bl | 48.8 TM |
| Sd | 754.77 cm² |
| SPL | 86.0 dB |
| RECOMMENDED VENTED BOX | |
| Volume | 140 L |
| Tuning frequency | 28 Hz |
| Vent diameter | Ø 100×100 mm |
| Vent length | 44 cm |
| Shape | Rectangle |
| End correction | Two flanged ends |
MANUFACTURER'S LABORATORY DATA · PEAK OR “BURST” FIGURES USED IN SOME MARKETS ARE NOT RMS
Complete the system
Before you install it
- Decide the impedance before you wire it. Rated impedance is 4 ohm, with two 2 ohm coils. Check that your amplifier is stable at the impedance you choose.
- Match the amplifier to 10000 W RMS. Sizing on the 20000 W PEAK figure means overdriving the coil: use the RMS value.
- Build the enclosure rigid. The product sheet gives a vented box of 140 L tuned to 28 Hz, vent Ø 100×100 mm and 44 cm long, two flanged ends: thick panels, braced and sealed, or the box will lose output and rattle.
- Plan the mounting and the handling. One unit weighs 60 kg: the baffle and the fixings have to hold it, and it takes two people to fit it.
- Size the power cable for the amplifier, with an inline fuse close to the battery and a ground point on bare metal.
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.