Deaf Bonce MFA-1.800 Review: 800 W at 1 Ohm in a Compact Machete Chassis
Updated: Oct 6
The Deaf Bonce MFA-1.800 is the second step in the Machete MFA-1 monoblock range, rated at 800 W RMS into 1 ohm, 570 W into 2 ohm and 340 W into 4 ohm at 14.4 V. It keeps the series' 24 dB/oct low-pass and subsonic filters in a chassis only 55 mm tall. In India it carries an MRP of ₹28,990, between the MFA-1.500 and the MFA-1.1000. It's aimed at the buyer with one serious 10-, 12- or 15-inch subwoofer who wants proper power without giving up much boot space. Today's offer is on our Deaf Bonce MFA-1.800 product page.
At a glance
800 W at 1 ohm lines up with the 800 W RMS rating of Deaf Bonce's MF-10S, MF-12S and MF-15S subwoofers in their dual 2-ohm versions.
At 2 ohm it's rated at 570 W, more than the cheaper MLA-800 (540 W) and AAP-800.1D (480 W).
Controls include a 50–250 Hz low-pass, a 10–55 Hz subsonic filter, 0–12 dB of bass boost at 45 Hz, a phase switch and an included bass remote.
No owner reviews or independent tests surfaced when we checked, and the inputs are RCA only.
Deaf Bonce MFA-1.800 specifications
Specification | Deaf Bonce MFA-1.800 |
|---|---|
Type | Mono Class D subwoofer amplifier |
RMS power at 1 ohm (14.4 V) | 800 W |
RMS power at 2 ohm (14.4 V) | 570 W |
RMS power at 4 ohm (14.4 V) | 340 W |
Minimum load | 1 ohm |
Frequency response | 10–250 Hz |
Low-pass filter | 50–250 Hz, 24 dB/oct |
Subsonic filter | 10–55 Hz, 24 dB/oct |
Bass boost | 0–12 dB at 45 Hz |
Phase | 0° / 180° |
Input | RCA, 0.4–6 V sensitivity |
Damping factor | At least 160 |
Signal-to-noise ratio | At least 88 dB |
Operating voltage | 9–15 V |
Power and speaker terminals | 4 AWG and 8 AWG |
Dimensions | 191.4 × 151.8 × 54.7 mm |
Packed weight | 1.78 kg |
India MRP | ₹28,990 |
Sources: Deaf Bonce's MFA-1.800 product page and the shared MFA-1 owner's manual, which also lists the bass remote and mounting kit in the box. Power is quoted at 14.4 V only.
Which subwoofers get the most from it
An 800 W monoblock makes most sense with a subwoofer built for that kind of power. Deaf Bonce's MF-12S, along with the 10-inch MF-10S and 15-inch MF-15S, is rated at 800 W RMS. Buy the dual 2-ohm (D2) version, wire its two coils in parallel for 1 ohm, and amplifier and driver are matched watt for watt on paper.
The dual 4-ohm (D4) versions wire to 2 ohm, where the MFA-1.800 is rated at 570 W. That leaves the sub with plenty in reserve, which is no bad thing in a daily driver that spends most of its life at moderate volume. A 500 W driver such as the ML-12R D4 at 2 ohm would see slightly more than its rating at full output, so set the gain with care.
Filters, gain and the factory head unit
The filters are the MFA-1 range's strongest point. Both the 50–250 Hz low-pass and the 10–55 Hz subsonic roll off at 24 dB/oct. The subsonic matters most with ported boxes, since it stops the cone flapping below the port's tuning, while the steep low-pass keeps upper bass out of the sub. Bass boost adds up to 12 dB at 45 Hz; start at zero and add it only if the car needs it, because every decibel of boost eats into your headroom.
Gain spans 0.4–6 V, enough range for a weak head-unit pre-out or a strong DSP output. Set it with a test tone rather than by ear; the orange clip LED shows when you've gone too far. The only input is RCA, though. With a factory touchscreen you need a converter such as the Deaf Bonce M6C, or a processor with high-level inputs like the M8-DSP. Our guide to why a DSP helps in car audio explains what a DSP does in a car.
What owners and reviewers say about the Deaf Bonce MFA-1.800
We found no owner reviews, forum reports or independent measurements of the MFA-1.800 when we checked in October 2026. Deaf Bonce's product page and manual give specifications but no test data, and the US dealer page for this model returned an error. Several large retailer and forum sites blocked our access, so owner feedback may exist that we couldn't reach.
Until independent reports appear, treat the published figures as the manufacturer's claims. If you own one, tell us which subwoofer and box you run it with; that's exactly the feedback this page is missing.
How it compares with other Deaf Bonce monoblocks
Two cheaper models give about 800 W at 1 ohm. The MLA-800 (₹22,990 MRP) is rated at 790 W, 540 W and 340 W into 1, 2 and 4 ohm, matching the MFA-1.800 at 4 ohm and trailing slightly elsewhere. It saves ₹6,000 but measures 325 × 216 × 50 mm, and its 12 dB/oct low-pass covers 32–300 Hz. The AAP-800.1D (₹23,990) is compact at 160 × 135 × 64 mm and rated at 790 W, 480 W and 270 W, with a 12 V figure of 700 W at 1 ohm; its 12 dB/oct low-pass starts at 80 Hz.
The tougher rival is the Apocalypse Atom 1300.1 PRO. At ₹27,990 it costs ₹1,000 less, measures a similar 180 × 140 × 54 mm and lists more power at every load: 1300 W, 780 W and 490 W. Its filters are 12 dB/oct, so the MFA-1.800's case against it rests on steeper slopes. For outright power per rupee, the Atom wins on paper. Within the MFA-1 range, the MFA-1.1000 adds 200 W at 1 ohm for ₹3,000 more.
Who should buy it, and who shouldn't
It's a good fit if you have one 800 W-class subwoofer, want the amplifier hidden in a small space, and prefer steep filters and a bass remote to a DSP for bass tuning.
Skip it if you want the most watts for your money, where the Atom 1300.1 PRO lists more for less, or if your sub runs at 1 ohm and budget is tight, where the MLA-800 and AAP-800.1D come close. It also has no speaker-level inputs.
Installation notes for Indian cars
An 800 W monoblock leans hard on the electrical system. Deaf Bonce doesn't publish current draw or a fuse rating for the MFA-1.800, so size the fuse to protect the cable and have the battery and charging system checked before fitting. The manual wants the fuse holder within 40 cm of the battery, and the power terminal is sized for 4 AWG; our Tchernov 4 AWG cable review looks at one suitable run. Ground to clean, bare metal close to the amplifier.
The 191.4 × 151.8 mm footprint is small enough to consider for a boot side wall or the back of the sub enclosure, but measure your car first. Leave space for air: the manual quotes no operating temperature, and a sealed boot in an Indian summer is a harsh place for electronics. VA3 Car Studio in Ghaziabad can plan and fit the whole bass system for you, including a custom-built subwoofer box.
Price and where to buy
The Deaf Bonce MFA-1.800 lists at an MRP of ₹28,990. We often sell below MRP, so check the current price on the MFA-1.800 product page, and ask us to confirm the right subwoofer wiring before you buy. Every amplifier we sell is genuine Deaf Bonce stock.
The bottom line
The MFA-1.800 suits one 800 W subwoofer: 800 W at 1 ohm to match it, a useful 570 W at 2 ohm for D4 drivers, and 24 dB/oct filters in a small case. Against it are RCA-only inputs, no independent feedback yet, and Deaf Bonce's own Atom 1300.1 PRO, which lists more power for slightly less. Buy it for a single, well-matched subwoofer where filter control matters more than the last few hundred watts.
Deaf Bonce MFA-1.800 FAQ
Which subwoofer suits the Deaf Bonce MFA-1.800 best?
On paper, an 800 W RMS subwoofer with dual 2-ohm coils wired to 1 ohm, such as the D2 versions of Deaf Bonce's MF-10S, MF-12S or MF-15S. The D4 versions wired to 2 ohm receive up to 570 W, which leaves headroom.
Can I run two subwoofers from the MFA-1.800?
Yes, if the combined load stays at 1 ohm or above. Two dual 4-ohm subwoofers, each wired to 2 ohm and then connected in parallel, present 1 ohm and share the 800 W. Check each sub's rating against its share of the power.
Does the MFA-1.800 have speaker-level inputs?
No. The manual lists only RCA inputs. To use it with a factory head unit, add a line output converter such as the Deaf Bonce M6C, or a DSP with high-level inputs such as the M8-DSP.
Buy Deaf Bonce Amplifiers in India
Check the Deaf Bonce Machete MFA-1.800 Mono Class D Amplifier 800W price in India, browse more Deaf Bonce amplifiers or compare all mono amplifiers in India. Want it fitted properly? Book amplifier installation at our Ghaziabad studio.
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