Deaf Bonce MF-12S Review: An 800 W Machete 12-Inch in D2 or D4

The Deaf Bonce MF-12S is a 12-inch Machete subwoofer driver rated at 800 W RMS (1,600 W max), with a 2.5-inch copper voice coil, 14 mm of linear excursion and a choice of dual 2 Ω (D2) or dual 4 Ω (D4) coils. At an India MRP of ₹23,990 it is the 12-inch member of the three 800 W Machete MF subs we list, between the 10-inch MF-10S and the 15-inch MF-15S, and below the 1,200 W MF-12R. It suits sedan and SUV owners who want a strong, all-round 12-inch with a published box design. Today's price is on our Deaf Bonce MF-12S product page.

Quick summary

• 800 W RMS, a 2.5-inch coil and 14 mm Xmax in a 12-inch frame, with an 86.0 dB SPL figure for the D2.

• Deaf Bonce's manual recommends a 50-litre ported box with a 150 cm² port, tuned to 35 Hz.

• The D2 and D4 differ noticeably on paper, so pick the version for your amplifier and design any sealed box for that version.

• No owner or press reviews were available to us, so this review uses Deaf Bonce's published figures.

Deaf Bonce MF-12S specifications

Specification	Machete MF-12S
Type	12-inch (305 mm) subwoofer driver
Voice coils	Dual 2 Ω (D2) or dual 4 Ω (D4)
Voice coil	2.5-inch, copper wire
Power handling	800 W RMS, 1,600 W max
SPL	D2 86.0 dB; D4 87.0 dB
Fs	D2 35.0 Hz; D4 38.0 Hz
Qts	D2 0.49; D4 0.51
BL	D2 18.5 T·m; D4 21.5 T·m
Vas	D2 36.5 litres; D4 34.3 litres
Xmax / Xmech	14 mm / 28 mm
Construction	Paper cone, foam surround, ferrite magnet, steel frame
Mounting depth	159.7 mm
Cut-out diameter	283.0 mm
Gross weight (packed)	8.00 kg
Recommended box (manual)	Ported, 50 litres, 150 cm² port 62 cm long, tuned to 35 Hz
India MRP	₹23,990

The D2 figures are from Deaf Bonce's MF-12S D2 page, which shows only that version. The D4 figures and box recommendation come from the combined MF-series manual linked from Deaf Bonce's MF-15S page, and the D4 figures match our listing.

D2 or D4: more than a wiring choice

In Deaf Bonce's manual, the D2 and D4 figures for the MF-08S and MF-10S are almost identical. The MF-12S is different: the D4 has a stronger BL of 21.5 against 18.5, a higher Fs of 38.0 Hz against 35.0 Hz, a slightly smaller Vas and an SPL figure 1 dB higher. On paper, the D4 is the slightly more efficient driver and the D2 the one with a lower resonance.

In practice, choose the version that suits your amplifier, then design any custom box from that version's own parameters. Deaf Bonce's recommended ported box is the same for both.

The box Deaf Bonce recommends

Deaf Bonce's manual gives the MF-12S a ported enclosure of 50 litres (1.7 cubic feet) with a 150 cm² port 62 cm long, tuned to 35 Hz. The same manual suggests a subsonic filter 5 Hz below the tuning, which works out at about 30 Hz here, a low-pass between 63 and 80 Hz, bass boost off, and roughly 40 hours of running-in at medium power.

A sealed box is the alternative if you want something smaller with tighter control. With Qts around 0.5, either version suits a modest sealed enclosure, but it should be modelled from the published figures rather than guessed.

Wiring and amplifier pairing

A D2 presents 4 Ω with its coils in series or 1 Ω in parallel; a D4 presents 8 Ω or 2 Ω. Connect both coils, always. Against Deaf Bonce's 14.4 V amplifier ratings:

• One D2 at 1 Ω on the MLA-800 gets 790 W, essentially the full 800 W rating, with the amp at its 1 Ω minimum.

• One D4 at 2 Ω on the MLA-1000 gets 680 W, leaving some headroom.

• One D2 at 4 Ω on the MLA-1500 gets 540 W, a cautious match with a big amplifier in reserve.

• Two D4s, each wired to 2 Ω and then paralleled to 1 Ω, get about 740 W each from the MLA-1500: a well-matched pairing for a twin-sub SUV build.

Whichever you choose, set the gain with a test tone and remember that real output falls when the engine idles with the AC running.

What owners and reviewers say about the Deaf Bonce MF-12S

When we checked in October 2026, we found no owner reviews, forum threads or magazine tests of the MF-12S that we could read and verify. Deaf Bonce's page and manual are manufacturer material. The product data at Alphard Audio, the online store for Deaf Bonce's US dealer, carries no customer reviews, though it lists the sub in D2 and D4; the listing dates from August 2021. Its promotional text describes a 2.5-inch CCAW coil, steel frame and high-roll foam surround; Deaf Bonce's own page says copper, and we follow the manufacturer.

So there is no owner consensus to report. If you run an MF-12S, we'd welcome your notes on output and reliability.

MF-12S vs MF-10S, ML-12R and MF-12R

The MF-10S (₹19,990 MRP) has the same 800 W rating, coil and Xmax in a 10-inch that Deaf Bonce pairs with a 40-litre box; the MF-12S adds cone area and a 2 dB higher SPL figure for ₹4,000 more. The ML-12R (₹17,990 MRP) appears to share the same recommended 50-litre box (its manual's table is unlabelled) but is rated at 500 W with a 2-inch coil and 12 mm Xmax.

Above it, the MF-12R (₹27,990 MRP) moves to 1,200 W RMS, a 3-inch CCAW coil and 15 mm Xmax, with a 55-litre recommended box. Deaf Bonce's own promotional text pitches the MF-12R at high-SPL builds with a large amplifier; the MF-12S asks for less power and costs ₹4,000 less.

Who should buy it, and who shouldn't

Buy the MF-12S if you have room for a 50-litre box, you want a 12-inch that can use an 800 W-class amplifier, and you like having a manufacturer box design to start from.

Look elsewhere if your boot can't spare that space, where the MF-10S or MF-08S fit better, or if you're chasing maximum SPL with a very large amplifier, where the MF-12R is designed for more power.

Installation notes for Indian cars

The MF-12S needs a 283.0 mm cut-out and 159.7 mm of mounting depth, so its box is deeper than one for the ML-12R. A 50-litre ported enclosure sits well against the rear seat of a sedan or on an SUV's load floor; in a hatchback it will take a large share of the boot. If you run two, plan the boxes around the spare wheel and any CNG cylinder.

At 8.00 kg packed per driver, fix the enclosure solidly. An MLA-800 at 1 Ω or an MLA-1500 driving a pair draws heavy current, so use properly fused, heavy-gauge cable, check the battery and earth points, and give the amplifier room to cool. Our sound damping guide helps with boot rattles. VA3 Car Studio in Ghaziabad can build the box and install the system.

Price and where to buy

The MF-12S carries an MRP of ₹23,990 for either version. We often sell below MRP; pick D2 or D4 on the Machete MF-12S D2/D4 listing to see today's price, and ask us about a box-and-amplifier package.

Check today's price at VA3 Car Studio

The bottom line

The MF-12S is a balanced choice in Deaf Bonce's Machete range: 800 W RMS, 14 mm Xmax, a published 50-litre ported box and two coil versions that behave a little differently on paper. Paired with an MLA-800 at 1 Ω, or as a pair of D4s on an MLA-1500, it makes a strong 12-inch system for a sedan or SUV. Owner feedback is the missing piece, and we'd welcome it.

Deaf Bonce MF-12S FAQ

Should I choose the Deaf Bonce MF-12S in D2 or D4?

Choose by amplifier. A D2 wired to 1 ohm gets 790 W from a Deaf Bonce MLA-800, close to its 800 W rating, while a D4 wired to 2 ohms gets 680 W from an MLA-1000. The D4 also has a higher BL and Fs on paper, so design any sealed box for the version you buy.

What box does the MF-12S need?

Deaf Bonce's combined MF-series manual recommends a ported box of 50 litres with a 150 cm² port 62 cm long, tuned to 35 Hz, with a subsonic filter about 5 Hz below the tuning.

Will an MF-12S fit in a hatchback?

It can, but the 50-litre ported box Deaf Bonce recommends will take a large share of a hatchback's boot, and the driver needs 159.7 mm of mounting depth. If space matters, the 10-inch MF-10S with its 40-litre box is the easier fit.

Buy Deaf Bonce Subwoofers in India

You can buy the Deaf Bonce Machete MF-12S D2/D4 12-Inch Subwoofer 800W RMS online from VA3 Car Studio with pan-India shipping. See more Deaf Bonce subwoofers, compare other car subwoofers, or book subwoofer installation in Ghaziabad.