SP-12X NEO . 4000 WATT RMS (PRICE UNIT)
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SUPER POWER AUDIODESIGNED IN ITALY
MMXXVI
4000 watt RMS.
Neodymium motor.
A 12"/30 cm high-excursion subwoofer on an N38H neodymium motor: 4000 W RMS, 8000 W continuous program power, 94 dB sensitivity, 4" voice coil with CCAW four-layer winding, Xmax ±17.5 mm, carbon fibre cone with high-roll foam surround. Net weight 19.5 kg. Sold per unit.
Power, measured not promised
RMS = CONTINUOUS POWER. THE PROGRAM FIGURE IS NOT RMS: SIZE THE AMPLIFIER ON THE 4000 W RMS
Why this subwoofer
Not a burst figure: 4000 W RMS is the power the voice coil handles continuously, with 8000 W of continuous program power on top.
A four-inch coil on an aluminium former, wound in four layers of CCAW over a 70 mm winding depth: the heat gets out and the coil stays alive.
Two coils: in parallel 1 ohm, in series 4 ohm. You choose the impedance that matches your amplifier instead of the other way round.
An N38H neodymium magnet stack on an aluminium heatsink basket: 19.5 kg net for 4000 W RMS, with Xmax ±17.5 mm of clean travel.
Look closer
Wiring of the two voice coils, impedance, mounting and full specifications.
⇩ Open the manual (PDF)PDF · Google Drive
What you receive
- One SP-12X NEO 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 | 12" |
| Rated impedance | 2+2 ohm (dual voice coil) |
| Rated power (RMS) | 4000 W |
| Continuous program power | 8000 W |
| Sold as | Single unit |
| ACOUSTICS | |
| Sensitivity (1 W / 1 m) | 94 dB |
| Frequency range | 33–500 Hz |
| MOTOR AND MATERIALS | |
| Voice coil diameter | 4" |
| Winding material | CCAW, 4 layers |
| Former material | Aluminium |
| Winding depth | 70 mm |
| Xmax | ±17.5 mm |
| Surround material | Carbon fibre cone / high-roll foam surround |
| Surround design | U-shape |
| Magnet | N38H neodymium |
| MOUNTING | |
| Overall diameter | 312 mm |
| Bolt circle | 297 mm, 8 × Ø6.5 mm |
| Baffle cutout diameter | 280 mm |
| Depth | 285 mm |
| Net weight | 19.5 kg |
| Shipping weight | 21.5 kg |
| Shipping box (single) | 420 × 400 × 410 mm |
| THIELE-SMALL PARAMETERS | |
| Fs — resonance frequency | 33.48 Hz |
| Qts — total Q | 0.34 |
| Qms | 5.35 |
| Qes | 0.37 |
| Vas — equivalent air load | 16.92 |
| Mms — moving mass | 394.64 |
| Cms — compliance | 0.05 |
| Bl — force factor | 24.89 |
| Sd — piston area | 0.05 |
| Re — DC resistance | 1 Ω |
| η0 — reference efficiency | 0.24 |
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. The two 2 ohm coils in parallel give 1 ohm, in series 4 ohm. Check that your amplifier is stable at the impedance you choose.
- Match the amplifier to 4000 W RMS. The 8000 W figure is continuous program power, not RMS: size the amplifier on the RMS value.
- Build the enclosure rigid. A 12" cone with ±17.5 mm of travel loads the box hard: thick panels, braced and sealed. The sheet gives a baffle cutout of 280 mm and a depth of 285 mm: check them before you cut the panel.
- 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.