AudioControl SPC-10S4 Review: Specifications, Fitment and Comparisons
Quick summary: the buying decision
The SPC-10S4 is a 10-inch Space Series subwoofer with a single 4-ohm voice coil, rated at 400 W RMS / 600 W max. It needs an enclosure and a mono amplifier; AudioControl publishes both sealed and ported box recommendations, which makes it straightforward to build or order a box that suits the driver. Mounting depth is 89 mm (3.5 in), so check the space behind the baffle before you commit.
AudioControl SPC-10S4: what it is
The AudioControl SPC-10S4 is a 10-inch Space Series low-profile subwoofer with a single 4-ohm voice coil, rated at 400 W RMS and 600 W max. With a mounting depth of just 89 mm (3.5 in) it fits where space is tight, and its weather-resistant design suits off-road vehicles.
The Space Series is AudioControl's low-profile subwoofer line: shallow-mount drivers with a fibre matrix injection-moulded polypropylene cone, a weather-resistant design with a wrap-sealed rubber gasket and a removable grille, aimed at tight spaces and off-road vehicles.
Key features
Low-profile, shallow-mount design with an 89 mm (3.5 in) mounting depth
Fibre matrix injection-moulded polypropylene cone
Weather-resistant design with a wrap-sealed rubber gasket to protect the enclosure interior
3-layer high-temperature voice coil former and optimal thermal efficiency design
Removable subwoofer grille included
Specifications explained
The SPC-10S4 is rated at 400 W RMS / 600 W max (single 4 ohm) with a 2.5 in (63.5 mm) voice coil. AudioControl quotes a 20 – 250 Hz frequency response and a driver displacement of 0.045 cu ft (1.275 L), which you add to the box's net volume when building.
Fitment: overall diameter 264 mm (10.39 in), cut-out 232 mm (9.13 in), mounting depth 89 mm (3.5 in) and mounting height 18 mm without grille, 31 mm with grille.
Full specifications as published by AudioControl:
Model: SPC-10S4
Type: 10 in shallow-mount single voice coil subwoofer driver
Size: 10 in
Impedance: Single 4 ohm
Power handling (Pe): 400 W RMS / 600 W max
Frequency response: 20 – 250 Hz
Voice coil diameter: 2.5 in (63.5 mm)
Displacement: 0.045 cu ft (1.275 L)
Overall diameter: 264 mm (10.39 in)
Cut-out diameter: 232 mm (9.13 in)
Mounting depth: 89 mm (3.5 in)
Mounting height: 18 mm without grille, 31 mm with grille
Sealed enclosure: 0.60 cu ft net; 26 x 14.5 x 5 in external (W x H x D); F3 60 Hz; Qtc 0.703
Ported enclosure: 1.40 cu ft net, tuned to 40 Hz; 24 x 14.5 x 12 in external; port 1.75 x 13 in, 22.25 in long; F3 34 Hz
Enclosure note: Recommended volumes exclude driver and port displacement
In the box: SPC-10S4 subwoofer, manual, warranty card
Enclosure: what AudioControl recommends
AudioControl's recommendations for the SPC-10S4:
Sealed: 0.60 cu ft (17.0 L) net; 26 x 14.5 x 5 in external (W x H x D); F3 60 Hz; Qtc 0.703
Ported: 1.40 cu ft (39.6 L) net, tuned to 40 Hz; 24 x 14.5 x 12 in external; port 1.75 x 13 in, 22.25 in long; F3 34 Hz
AudioControl notes that the recommended volumes exclude driver and port displacement, so add those when you calculate the internal size.
A sealed box gives tighter, more controlled bass and needs less space; a ported box plays louder and lower around its tuning frequency but is usually larger and needs a subsonic filter to protect the driver below tuning. Seal and brace the box well, and keep it away from rattling trim.
Wiring and amplifier matching
With a single 4-ohm voice coil, one subwoofer presents 4 ohm, two in parallel present 2 ohm and three in parallel present 1.33 ohm. One SPC-10S4 at 4 ohm is a direct match for the A800.1 or EPIC1000 (both 400 W at 4 ohm). Two in parallel (2 ohm) on the EPIC1000 get about 350 W each (700 W at 2 ohm).
Set the amplifier gain with a test tone or an oscilloscope rather than by ear, and use the low-pass filter to blend the subwoofer with the front speakers.
How it compares
Related AudioControl subwoofers at VA3 Car Studio:
AudioControl SPC-W10: loaded sealed wedge subwoofer enclosure, 10 in, 400 W RMS, 2 ohm, ₹50,990
AudioControl SPK-10S4: 10 in, single 4 ohm, 500 W RMS / 700 W max, mounting depth 135 mm, ₹34,840
AudioControl EPICX10D4: 10 in, dual 4 ohm, 500 W RMS / 750 W max, mounting depth 135.8 mm, ₹21,240
The SPC-10S4's 89 mm mounting depth is its main advantage: the Spike and EPICX 10-inch drivers need 135 mm or more.
Price and value in India
At the time of writing (October 2026), VA3 Car Studio lists the SPC-10S4 at ₹25,490, 15% below the MRP of ₹29,990. Remember to budget for an enclosure and a matched amplifier; the driver price is only part of the total. Prices can change, so the product page always shows the current price.
Verdict: who should shortlist the SPC-10S4
The SPC-10S4 is the one to shortlist when depth is the limiting factor, such as under seats, behind seats in pick-ups or in off-road vehicles where weather resistance matters.
Real-world reviews and limitations
We have not yet published a VA3 installation report for the SPC-10S4. The figures in this review are AudioControl's published specifications, not our own measurements, and real-world results depend on the enclosure, the cabin and the tune. If you have used one, we would welcome your feedback.
Frequently asked questions
What enclosure does AudioControl recommend for the SPC-10S4?
Sealed: 0.60 cu ft (17.0 L) net; 26 x 14.5 x 5 in external (W x H x D); F3 60 Hz; Qtc 0.703. Ported: 1.40 cu ft (39.6 L) net, tuned to 40 Hz; 24 x 14.5 x 12 in external; port 1.75 x 13 in, 22.25 in long; F3 34 Hz.
How much power does the SPC-10S4 need?
It is rated at 400 W RMS / 600 W max; an amplifier delivering close to the RMS rating at your final impedance is the usual target.
How should I wire the SPC-10S4?
It has a single 4-ohm voice coil: one sub is 4 ohm, two in parallel are 2 ohm and three in parallel are 1.33 ohm.
What mounting depth does the SPC-10S4 need?
89 mm (3.5 in), with a 232 mm (9.13 in) cut-out.
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