SP 8CM Slim Midrange 8" 150W RMS (Pair)
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SUPER POWER AUDIODESIGNED IN ITALY
MMXXVI
150 watt RMS.
Where a normal 8" will not go.
An 8"/20 cm midrange built on a shallow basket: 150 W RMS, 95 dB, a 38.5 mm EISV voice coil and a 31 Oz ferrite motor. It fits factory doors, rear shelves and panels that simply have no depth for a standard 8". Sold as a pair.
Power, measured not promised
PER SPEAKER · RMS IS CONTINUOUS POWER, NOT BURST · NOMINAL 4 Ω, MINIMUM 3.2 Ω
Why the SLIM version
Most doors will not take a standard 8": the window mechanism is in the way. The SLIM basket is shallow, so the 8" cone goes where only a 6.5" used to fit.
200 mm nominal, 182.5 mm cut-out, 209.2 mm outer diameter. More cone area than a 6.5" means more mid-bass at the same volume.
A 1.5" EISV voice coil wound with 220 °C aluminium wire on a 31 Oz ferrite motor: it takes continuous power without heating up.
Compressed paper with fiberglass, black painted, M-ROLL polycotton surround. Light enough to stay fast, rigid enough not to bend at high volume.
Look at it closely
Full specifications and mounting data, straight from the 2026 factory sheet.
⇩ Open the manual (PDF)English · 2026 edition · opens in a new tab
What you receive
The price on this page is for a pair: left and right, from the same production batch, so the two sides of the car are matched. Packed in the SP Audio box with the protective foam.
In the box: 2 × SP 8CM SLIM midrange · mounting screws · SP Audio packaging.
Not included: grilles, speaker cable, crossovers and adapter rings — installation materials, chosen for your car.
Technical specifications
| POWER & LOAD | |
|---|---|
| Rated power (RMS) | 150 W |
| Peak power (MAX) | 300 W |
| Rated impedance | 4 ohm |
| Minimum impedance | 3.2 ohm |
| ACOUSTIC | |
| Nominal diameter | 200 mm (8") |
| Sensitivity | 95 dB SPL 1W/1M |
| Frequency range | 80 Hz - 8 kHz |
| MOTOR & MATERIALS | |
| Voice coil diameter | 38.5 mm / 1.5" EISV |
| Winding material | 220 °C aluminium wire |
| Magnet | 31 Oz ferrite |
| Suspension | M-ROLL, polycotton |
| Cone | Compressed paper, fiberglass, black painted |
| Sold as | Pair (2 pieces) |
| MOUNTING | |
| Outer diameter | 209.2 mm (8.24") |
| Cut-out diameter | 182.5 mm (7.19") |
MANUFACTURER’S LABORATORY DATA · PEAK OR “BURST” FIGURES USED IN SOME MARKETS ARE NOT RMS AND ARE NOT LISTED
Complete the system
Before you install it
- Measure the panel before you cut. The basket is shallow, but the hole is still 182.5 mm with a 209.2 mm outer diameter: check the space around the window mechanism first.
- Do not go below 4 ohm per channel. Two speakers in parallel on one channel give 2 ohm: most amplifiers will heat up or go into protection.
- Use a high-pass filter. This is a midrange, not a woofer: cut below 80 Hz and let the subwoofer do the bass. It runs to 8 kHz, so add a tweeter for the top end.
- Seal the door panel. A midrange in an open door loses mid-bass: sound-deaden the panel and you gain more than changing the speaker.
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.