SP 8CM Midrange 8" 150W RMS (Pair)
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SUPER POWER AUDIODESIGNED IN ITALY
MMXXVI
150 watt RMS.
More cone, more voice.
The 8"/20 cm brother of the best seller: 97 dB, a 31 Oz ferrite motor, a 38.5 mm EISV voice coil and a solid aluminium phase plug. More cone area than a 6.5" means more mid-bass body under the voice, on the same power. Sold as a pair.
Power, measured not promised
PER SPEAKER · RMS IS CONTINUOUS POWER, NOT BURST · NOMINAL 4 Ω, MINIMUM 3.2 Ω
Why this midrange
Three decibels of sensitivity are worth double the amplifier. At 97 dB a 150 W channel is already a lot of sound inside a car.
A solid aluminium plug in the centre of the cone: it keeps the response clean off-axis and pulls heat away from the voice coil.
Compressed paper with fiberglass, black painted. Light enough to stay fast, rigid enough not to bend at high volume.
222 cm² of Sd against the 147 cm² of a 6.5": the same music gets more mid-bass body and more presence, before the amplifier works harder.
Look at it closely
Full specifications, Thiele-Small parameters 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 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 | 97 dB SPL 1W/1M |
| Frequency range | 90 Hz - 15 kHz |
| MOTOR & MATERIALS | |
| Voice coil diameter | 38.5 mm / 1.5" EISV |
| Winding material | 220 °C aluminium wire |
| Magnet | 31 Oz ferrite |
| Phase plug | Aluminium, solid |
| Suspension | M-ROLL, polycotton |
| Cone | Compressed paper, fiberglass, black painted |
| Sold as | Pair (2 pieces) |
| THIELE-SMALL PARAMETERS | |
| Fs | 114 Hz |
| Re | 3.2 ohm |
| Qts | 0.658 |
| Qes | 0.705 |
| Qms | 9.838 |
| Vas | 8.72 L |
| Xmax | 2.5 mm |
| Sd | 222 cm² |
| Cms | 124.93 µm/N |
| Mms | 15.68 g |
| Bl | 7.13 TM |
| η0 | 1.758 % |
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
- 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 90 Hz and let the subwoofer do the bass. Feeding it low notes is the fastest way to damage it.
- Set the gain properly. Clipping kills voice coils far more often than power does.
- Check the opening first. This is an 8"/20 cm frame, not a 6.5": measure the door or kick panel opening before ordering, or plan an adapter ring.
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.