Deaf Bonce AP-M81AC Review: Where an 8-Inch Midrange Fits and What It Needs
Updated: Oct 6
The Deaf Bonce AP-M81AC is an 8-inch (203 mm) Apocalypse midrange sold as a pair, rated at 300 W RMS (600 W max) into 4 Ω, with a listed sensitivity of 97.5 dB and a response of 110 Hz to 10 kHz. Its India MRP is ₹34,990, the highest of the ferrite-magnet Apocalypse midranges we stock, and it is the 8-inch counterpart to the 6.5-inch AP-M67AC, with the same 300 W rating. It is for builders who want more cone area in the lower midrange and have room for an 8-inch driver, usually in a custom door panel, kick panel or podium. See today's offer on our AP-M81AC store page.
Quick summary
An 8-inch paper-cone midrange with a 2-inch voice coil, ferrite motor and cast aluminium basket, rated at 300 W RMS.
Our listing quotes Deaf Bonce's filters: high-pass at 150–250 Hz (24 dB per octave) or 250–350 Hz (12 dB per octave), low-pass at 8–12 kHz.
The listed response stops at 10 kHz, so it has to be paired with a tweeter.
It is 84 mm deep with no listed cut-out, and unless your car already has an 8-inch opening it needs custom mounting.
Deaf Bonce AP-M81AC specifications
Specification | Deaf Bonce AP-M81AC |
|---|---|
Type | 8-inch (203 mm) midrange speaker, sold as a pair |
Series | Apocalypse |
Power handling | 300 W RMS, 600 W max |
Impedance | 4 Ω |
Frequency response | 110 Hz – 10 kHz |
Sensitivity | 97.5 dB |
Voice coil | 2 in |
Cone | Paper |
Magnet | Ferrite |
Basket | Cast aluminium |
Terminals | Screw terminals |
Mounting depth | 84 mm (3.3 in) |
Cut-out diameter | Not listed |
Recommended high-pass | 150–250 Hz at 24 dB/oct, or 250–350 Hz at 12 dB/oct |
Recommended low-pass | 8–12 kHz at 12 dB/oct |
India MRP | ₹34,990 (pair) |
Figures come from our store listing, which quotes Deaf Bonce's filter recommendations. When we checked in October 2026, the official AP-M81AC page confirmed the 8-inch size, pair packaging and series, but its power, impedance and response fields showed placeholder values.
Why choose an 8-inch midrange?
A bigger cone moves more air for the same excursion. In a loud front stage, the lower midrange carries the weight of male vocals, guitars and the upper part of a kick drum, and that is where an 8-inch driver has an edge over a 6.5-inch one played at the same level. Its 2-inch voice coil, the largest of the AC models we stock, adds thermal capacity for long, loud sessions.
The trade-offs are just as real. The listed response stops at 10 kHz, against 15 kHz for the 6.5-inch AC models, and a larger cone narrows its dispersion at a lower frequency, so a tweeter has to take over at the top. Sensitivity is lower too: 97.5 dB, about 4 dB below the AP-M67AC's 101.7 dB. On paper, that is roughly two and a half times the amplifier power for the same level, so the 300 W rating earns its keep here.
Power and filters: what the AP-M81AC needs
The recommended filters tell you how to protect it. With a steep 24 dB per octave high-pass, it can run from 150–250 Hz; with a gentler 12 dB slope, keep the high-pass at 250–350 Hz, because a shallow slope lets more bass through below the crossover point. The low-pass goes at 8–12 kHz, and with the response listed only to 10 kHz, starting near 8 kHz makes sense. That also lines up with our listing for the Deaf Bonce AT-32 super tweeter, which quotes an 8 kHz high-pass.
For power, Deaf Bonce's MFA-4.320 is listed at 320 W x 4 into 4 Ω at 14.4 V, close to the 300 W rating, and it can run a high-pass and a low-pass together between 50 Hz and 12 kHz at 12 dB per octave. That covers the 250–350 Hz option and the low-pass. The MFA-4.220, listed at 220 W x 4 into 4 Ω, is a reasonable step down: the rating is a ceiling, not a target. For the steeper 24 dB slope or time alignment, add a DSP; our article on the need for DSP in car audio explains what it brings.
What owners and reviewers say about the Deaf Bonce AP-M81AC
When we checked in October 2026, we found no owner or reviewer opinions on this exact model; the retailers, catalogues and forums we tried were blocked to us or had no listing.
The closest related item we found is a manufacturer notice about an older model, not a review. In a counterfeit warning published in September 2023, Deaf Bonce said fake sets of the AP-M81A, which it says was discontinued in 2022, were being sold on unauthorised websites and in Turkish markets, and it listed visual giveaways from box printing to cone colour and terminal size. The notice doesn't mention the AP-M81AC, but its advice applies to any Deaf Bonce speaker: buy from an authorised dealer. If you run a pair of AP-M81ACs, we'd like to hear how they work in your car.
AP-M81AC vs AP-M81SE and AP-M67AC
The AP-M81SE (₹18,990 MRP) is the steel-framed 8-inch alternative, rated at 170 W RMS with a 1.5-inch coil. For ₹16,000 more, the AC brings a 300 W rating, a 2-inch coil, a cast basket and a higher listed output, 97.5 dB against the SE's 95.1 dB SPL figure. The SE's listing also gives Thiele-Small figures and a 186.0 mm cut-out, which the AC's doesn't, so don't assume the AC drops into an SE-sized hole without measuring.
The 6.5-inch AP-M67AC (₹29,990) shares the 300 W rating and the same recommended filters, but it is listed at 101.7 dB, reaches 15 kHz and is 77 mm deep. Unless you want the extra cone area and have room for it, the AP-M67AC is the easier, more efficient choice.
Who should buy it, and who shouldn't
Buy the AP-M81AC if you are building a loud, amplified front stage with custom panels or podiums that can take an 8-inch driver, you want more lower-midrange output than a 6.5-inch midrange gives, and you have an amplifier with proper filters and a tweeter for the top end.
Skip it if you want to keep the factory speaker openings, you're running from head-unit power, or you don't want custom work. The 6.5-inch AP-M67AC or the cheaper AP-M61AC is far easier to fit.
Installation notes for Indian cars
Unless your car already has an 8-inch opening, plan on custom work: an enlarged opening with a rigid MDF or fibreglass baffle, a kick-panel enclosure or a door podium. Measure the 84 mm depth against the window glass and its runner, and measure the speaker itself for the cut-out, since none is listed. An 8-inch driver on a cast basket is heavier than a typical door speaker, so fix the baffle to the door metal, not the trim; on rough roads a weak mount will buzz.
Sealing matters as much as mounting. An open door cavity lets the cone's rear wave cancel its front wave, which costs output in exactly the range this driver is bought for, so seal and damp the door as our damping guide describes, or build a sealed podium. VA3 Car Studio in Ghaziabad can design and fabricate panels for an 8-inch midrange.
Price and where to buy
The Deaf Bonce AP-M81AC has an MRP of ₹34,990 for the pair. VA3 Car Studio often sells below MRP, so check the current price on the AP-M81AC product page. Deaf Bonce's US catalogue lists several similarly named models, including the M81AC Pro, M81AC Neo Sport, M81SE Neo and M81SE Pro, so check that the box and the speaker label say AP-M81AC. Every pair we sell is genuine Deaf Bonce stock.
The bottom line
The AP-M81AC is a specialist part: a 300 W, 8-inch midrange with a cast basket and a 2-inch coil, built for more lower-midrange output than a 6.5-inch driver can give. It is less sensitive than the 6.5-inch AC models, stops at 10 kHz and needs an 8-inch opening or custom mounting, so it needs space, a filtered amplifier and a tweeter above it. If you lack the space, the AP-M67AC is the easier choice.
Deaf Bonce AP-M81AC FAQ
What crossover settings does the Deaf Bonce AP-M81AC need?
Our listing quotes Deaf Bonce's recommendation: a high-pass of 150 to 250 Hz at 24 dB per octave, or 250 to 350 Hz at 12 dB per octave, and a low-pass of 8 to 12 kHz at 12 dB per octave. Start the low-pass near 8 kHz, as the response is listed to 10 kHz.
Will the AP-M81AC fit in my car's doors?
Only if your doors already take an 8-inch speaker or you are prepared for custom work. It is 84 mm deep and no cut-out is listed, so measure the speaker and the door, including window clearance, first.
Do I need a tweeter with the AP-M81AC?
Yes. Its listed response ends at 10 kHz and an 8-inch cone narrows its dispersion well before that, so a tweeter crossed in at around 8 kHz is needed for a complete top end.
Buy Deaf Bonce Speakers in India
Check the Deaf Bonce Apocalypse AP-M81AC 8-Inch Midrange Speakers 300W RMS price in India, browse more Deaf Bonce speakers or compare all midrange and midbass speakers in India. Want it fitted properly? Book a speaker upgrade at our Ghaziabad studio.
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