Deaf Bonce M6C Review: 6-Channel Line Output Converter for Factory Head Units
Updated: Oct 6
The Deaf Bonce M6C is a powered six-channel line output converter from the Machete range: it takes the speaker-level signal from a factory head unit and turns it into RCA line-level signal for aftermarket amplifiers. It accepts six high-level input channels, delivers three pairs of RCA outputs at up to 4.5 V and can switch your amplifiers on automatically when music starts. Its Indian MRP is ₹6,990, which makes it a low-cost way to connect Deaf Bonce amplifiers to a factory touchscreen; the M8-DSP processor sits well above it. You can order it from our Deaf Bonce M6C product page.
Quick summary
Six speaker-level inputs and three pairs of RCA outputs, more than a typical four-speaker factory system needs.
Auto turn-on: a REM output rated at more than 1 A at 12 V switches amplifiers on when the head unit sends a signal.
Published figures include 5 Hz – 100 kHz range, 95 dB signal-to-noise ratio and 0.01% THD; no output level control is listed.
No owner reviews or independent tests turned up when we checked, so these figures are the maker's own.
Deaf Bonce M6C specifications
Specification | Deaf Bonce M6C |
|---|---|
Type | Line output converter, high level to low level |
Channels | 6 |
Inputs | Speaker level, maximum input voltage less than 20 V |
Input impedance | 1 kOhm |
Outputs | 3 pairs of RCA line outputs |
Output voltage | 4.5 V |
Output impedance | 22 kOhm |
Frequency range | 5 Hz – 100 kHz |
Channel separation | More than 80 dB |
Signal-to-noise ratio | 95 dB |
THD | 0.01% |
Auto turn-on | Yes, REM output more than 1 A at 12 V |
Supply voltage | 8–15 V |
Standby current | 90 mA |
Dimensions | 87.5 × 109 × 45 mm |
Packed weight | 0.50 kg |
India MRP | ₹6,990 |
The electrical figures come from the M6C page on Alphard's official Russian store; Alphard is the group behind the Machete range. Deaf Bonce's own M6C product page confirms the model, type and 0.50 kg packed weight, but its linked manual isn't readable online, so we couldn't check installation details against it.
What it does, and why many Indian cars need it
Many owners prefer to keep a factory touchscreen, since it often runs the reversing camera, phone mirroring and vehicle settings too. The catch is that factory head units usually lack RCA pre-outs, so there's nothing to plug an amplifier into. A line output converter solves that by tapping the speaker wires and producing a clean, lower-voltage signal an amplifier's RCA inputs can accept.
The M6C does this for six channels at once. Alphard describes it as working with any amplifier, and its 4.5 V output sits inside the input ranges of the Deaf Bonce amplifiers we sell: the MFA-1.500 monoblock accepts 0.4–6 V and the MFA-4.80 four-channel 0.4–8 V. That matters with the MFA-1 range in particular, because those monoblocks have RCA inputs only.
Wiring it into a factory system
Six input channels cover a typical four-speaker factory system's front and rear feeds with two to spare, and the three RCA output pairs carry the signal on to your amplifiers. The REM output then gives the amplifiers their turn-on signal when audio arrives, so you don't need to find a switched remote wire behind the dash. With more than 1 A available on that output, it can trigger several amplifiers.
No output level control appears in the published specification, so levels are set at the amplifier's gain. Start with the head unit at about three-quarters volume and set each amplifier's gain from there. Alphard lists a standby current of 90 mA; if the converter is wired to a permanent 12 V feed, that's a constant small drain, so for a car that may stand unused for weeks an ignition-switched supply is the safer choice.
What owners and reviewers say about the Deaf Bonce M6C
When we checked in October 2026, we found no owner reviews, forum discussions or independent tests of the M6C. Deaf Bonce's product page carries only the basic details, Alphard's Russian store page shows no customer reviews, and the large retailer and forum sites we tried either had nothing on it or blocked our access.
The specifications above are manufacturer figures, not measurements we can vouch for. If you've used an M6C with a factory head unit in an Indian car, we'd welcome your notes on noise, turn-on behaviour and which car it went into.
How it compares with the JL Audio LoC-22 and the M8-DSP
The JL Audio LoC-22 (₹15,990 MRP) is a two-channel converter with a published input limit of 40 V RMS, up to 8 V RMS output, a selectable input load, a clip LED and a choice of signal-sensing or DC-offset turn-on. It costs more than twice as much and handles a third of the channels, but it offers more adjustment for awkward factory systems. Deaf Bonce also lists an M6C PRO, a separate model; this post covers the plain M6C we stock.
The Deaf Bonce M8-DSP (₹39,990) is another route: four high-level input channels and per-channel crossovers set up from PC or Android software. A converter simply passes on whatever the factory head unit sends, including any built-in equalisation, while a processor lets you set filters for each channel before the signal reaches the amplifiers. Our guide to why a DSP matters in car audio explains what a DSP does in a car.
Who should buy it, and who shouldn't
Buy the M6C if you're keeping a factory head unit, want to add one or two amplifiers at sensible cost, and the factory sound is already reasonably balanced. It's a natural partner for an MFA-1 monoblock driving a subwoofer, or a four-channel amplifier for the doors.
Look elsewhere if your factory system sounds thin or harsh, or uses heavy equalisation, because a converter can't fix that; consider a DSP such as the M8-DSP instead. Choose the LoC-22 if you need its higher input limit or adjustable input load.
Installation notes for Indian cars
Tap the speaker wires with proper connectors or a vehicle-specific harness rather than twisting and taping, which fails in heat and dust. Confirm the polarity of each channel before connecting, since a reversed pair can thin out the bass. Mount the 87.5 × 109 × 45 mm unit somewhere dry and secure behind the dash or under a seat, keep the RCA cables away from the amplifier's power run, and use a solid ground.
Some factory systems use separate amplifiers or unusual wiring, so ask us to check your car before you buy. VA3 Car Studio in Ghaziabad can install the converter and amplifiers for you; see our note on head unit types if you're weighing a replacement instead.
Price and where to buy
The Deaf Bonce M6C has an MRP of ₹6,990. VA3 Car Studio often sells below MRP, so check today's price on the M6C product page. We sell genuine Deaf Bonce stock, and we can advise on the amplifier and wiring to go with it.
The bottom line
The M6C is a straightforward, affordable bridge between a factory head unit and aftermarket amplifiers: six inputs, three RCA output pairs, auto turn-on with a strong REM output, and published noise and distortion figures that look clean on paper. It doesn't tune or correct anything, there's no level control listed, and no independent reviews exist yet. For a factory-screen car getting a subwoofer or door amplifier, it's the sensible first step.
Deaf Bonce M6C FAQ
What does the Deaf Bonce M6C do?
It converts the speaker-level signal from a factory head unit into RCA line-level signal for aftermarket amplifiers. It handles six input channels, has three pairs of RCA outputs and can switch amplifiers on automatically through its REM output.
Does the M6C turn my amplifier on automatically?
Yes. Alphard's specification lists automatic turn-on, with a REM output rated at more than 1 A at 12 V that switches the amplifiers on when a signal arrives from the head unit.
Do I need the M6C or the M8-DSP?
If your factory sound is reasonably balanced and you just want to add amplifiers, the M6C is enough. If you want per-channel crossovers set from software, or more processing between the head unit and the amplifiers, look at the M8-DSP.
Buy Deaf Bonce Line Output Converters in India
You can buy the Deaf Bonce Machete M6C 6-Channel High-to-Low Line Output Converter online from VA3 Car Studio with pan-India shipping. See more Deaf Bonce line output converters, compare other line output converters, or book OEM integration in Ghaziabad.
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