SP 15CXXX SUBWOOFER 15"/38CM 3500W RMS – SP Audio

SP 15CXXX SUBWOOFER 15"/38CM 3500W RMS – SP Audio – view 2

SP 15CXXX SUBWOOFER 15"/38CM 3500W RMS – SP Audio – view 3

SP 15CXXX SUBWOOFER 15"/38CM 3500W RMS – SP Audio – view 4

SP 15CXXX SUBWOOFER 15"/38CM 3500W RMS – SP Audio – view 5

SP 15CXXX SUBWOOFER 15"/38CM 3500W RMS – SP Audio – view 6

SP 15CXXX SUBWOOFER 15"/38CM 3500W RMS – SP Audio – view 7

SP 15CXXX SUBWOOFER 15"/38CM 3500W RMS – SP Audio – view 8

SP 15CXXX 15 inch subwoofer on display in a lit car audio shop window

SP 15CXXX subwoofer seen from the side on a showroom plinth, basket and motor visible

Front view of the SP 15CXXX carbon cone and large R form suspension on a wooden surface

SP Audio

SP 15CXXX Subwoofer 15" 3500W RMS 2+2 Ohm

Name: SP 15CXXX Subwoofer 15" 3500W RMS 2+2 Ohm
Brand: SP Audio
SKU: 16003
Price: 21236.00 MXN
Availability: InStock

$ 21,236.00

Quantity:

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SUPER POWER AUDIO
DESIGNED IN ITALY
MMXXVI

subwoofer 15" / 38 cm · dual voice coil 2+2 ohm

3500 watt RMS.
75.5 mm voice coil.

A 15"/38 cm subwoofer built around a 75.5 mm dual voice coil: 2+2 ohm, 3500 W RMS continuous, 7000 W peak, 89 dB sensitivity. compressed paper + fibreglass + black paint cone, large “R” form suspension, 220 °C aluminium wire winding. Sold per unit.

SP 15CXXX subwoofer 15"/38 cm on display in a lit car audio shop window

3500WRMS

7000WMAX

89dBSENSITIVITY

🔒 Secure checkout · SSL & PCI DSS↩ 14 days to change your mind (EU)✓ Invoice from an Italian company

✓ ITALIAN DESIGN✓ DUAL VOICE COIL 2+2 Ω✓ 75.5 MM VOICE COIL✓ EASY WIRING✓ FREE SUPPORT

01

Power, measured not promised

RMS · CONTINUOUS

3500 W

MAX · PEAK

7000 W

RMS = CONTINUOUS POWER. THE PEAK FIGURE IS A SHORT-TERM VALUE: SIZE THE AMPLIFIER ON THE 3500 W RMS

02

Why this subwoofer

3500 W RMS, continuous

Not a burst figure: 3500 W RMS is the power the voice coil handles continuously, with 7000 W of peak headroom on top.

A 75.5 mm voice coil

The bigger the coil, the more heat it dissipates and the longer it survives a real session. Wound with 220 °C aluminium wire.

Dual voice coil 2+2 ohm

Two coils: in parallel 1 ohm, in series 4 ohm. You choose the impedance that matches your amplifier instead of the other way round.

Cone built to be driven hard

Compressed paper + fibreglass + black paint, large “R” form suspension: it takes the excursion without losing shape.

“Continuous RMS only. No peak, no burst, no marketing watts.”

03

Look closer

SP 15CXXX subwoofer on a showroom plinth, basket and motor assembly in view — **Rear and motor assembly**

Front view of the SP 15CXXX cone and large R form suspension on a wooden surface — **Cone and suspension, front view**

Free shippingDispatched from Italy in 24–48 working hoursWarranty on manufacturing defectsFree technical support from Italy

USER MANUAL SP 15CXXX

Wiring of the two voice coils, impedance, mounting and full specifications.

⇩ Open the manual (PDF)

PDF · English · 2026

04

What you receive

One SP 15CXXX 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.

05

Technical specifications

SUBWOOFER — SPECIFICATIONS
POWER AND LOAD
Nominal diameter	380 mm (15")
Rated impedance	4 ohm (dual voice coil 2+2 ohm)
Rated power (RMS)	3500 W
Peak power (MAX)	7000 W
Sold as	Single unit
ACOUSTICS
Sensitivity (1 W / 1 m)	89 dB SPL
Frequency range	20–750 Hz
MOTOR AND MATERIALS
Voice coil diameter	75.5 mm
Winding material	220 °C aluminium wire
Suspension	Large “R” form
Cone	Compressed paper + fibreglass + black paint

MANUFACTURER'S LABORATORY DATA · PEAK OR “BURST” FIGURES USED IN SOME MARKETS ARE NOT RMS

06

Complete the system

MONO AMPLIFIERSP-1500.1 MINI — 1500 W RMS POWER CABLESP 0GA RED 100% OFC COMPLETE WIRING KITSP KIT CABLE 0 AWG DISTRIBUTION BLOCKSP DB 01 — 1x0GA IN + 3x4GA OUT

07

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 3500 W RMS. Sizing on the 7000 W PEAK figure means overdriving the coil: use the RMS value.
Build the enclosure rigid. A 15" cone moving this much air loads the box: thick panels, braced and sealed, or the box will lose output and rattle. The product sheet does not give a recommended box volume: write to us and we will work it out with you.
Size the power cable for the amplifier, with an inline fuse close to the battery and a ground point on bare metal.

08

Questions installers ask

How much power does the SP 15CXXX handle?3500 W RMS continuous and 7000 W peak.

What impedance is it and which amplifier does it need?Dual voice coil 2+2 ohm: wired in series it gives 4 ohm, in parallel 1 ohm. Use a mono amplifier able to deliver about 3500 W RMS at the impedance you wire.

Is the price for one unit or for a pair?The price is for one single subwoofer.

What size is it and how big is the voice coil?Nominal diameter 380 mm (15"), voice coil 75.5 mm.

What is the frequency range?20–750 Hz, with 89 dB sensitivity.

Free technical support from Italy. Write or call and a person answers, with the real data of the product sheets. Tell us what you want to build — impedance, power, box litres, crossover points — and we will help you match it.
spaudio@spaudio.it · +39 340 807 8778

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SP Audio — Super Power Audio. Designed in Italy by Audiocar Import & Export SRLS, Milano, official SP Audio distributor for Europe.

SP Audio SP 15CXXX Subwoofer 15" 3500W RMS 2+2 Ohm