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Ruthless Audio

Ruthless Audio Neo 4"VC Subwoofer

Ruthless Audio Neo 4"VC Subwoofer

Regular price $1,349.95 USD
Regular price Sale price $1,349.95 USD
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FLAGSHIP NEO 4″ VC SUBWOOFER

4,500WRMS POWER
15″ / 18″AVAILABLE SIZES
D0.7 / D1.7VOICE COIL OPTIONS
4″ 4-LAYER COILNEO MOTOR DESIGN5-LAYER SOFT PACKOPEN-COLUMN COOLING
Size
Ohm Load

The Ruthless Audio Neo 4" VC Subwoofer is built for one thing: domination. Engineered for competitors and hardcore bass enthusiasts, this beast delivers a relentless 4,500 watts RMS of pure power handling. When you unleash it, you’re not just hearing bass—you’re feeling destruction. Every hit is deep, tight, and brutally accurate, built to crush SPL lanes and street setups alike.

 

Power means nothing without control, and this sub delivers both. The massive 4-inch voice coil and 5-layer progressive spider suspension keep the motor movement perfectly centered, even under insane power loads. Its open-column Neo motor design reduces weight while maximizing magnetic strength, translating every watt into extreme output with lightning-fast response.

 

To keep performance ruthless under pressure, the Neo 4" is loaded with intelligent cooling and efficiency features. The pole sleeve and aluminum dome compression cap pull heat away from the coil, lower inductance, and maintain consistent output during extended demos or competition runs. The result is clean, powerful bass that never fades, no matter how hard you push it.

 

If you’re building for maximum SPL, competition-grade performance, or just want the most aggressive subwoofer on the street, the Ruthless Audio Neo 4" VC is your weapon of choice. Built to run loud, hit harder, and stay cool, this is the sub that defines the word Ruthless.

Available in 15" or 18" 

4” coil offer a selection of d.7 or d1.7

4500 RMS

5 layer progressive soft pack

Push terminals 

Extra heavy aluminum basket

Wrap around gasket

Kraft pulp fiber reinforced cone

Dual layer wide foam surround

Standard heavy duty stitched hybrid lead or push/hybrid termination

144 tinsel count leads

FEA optimized motor design

Ultra Flux density design

4” diameter 4 layer coil

Open column motor design for increased cooling

T/S parameters coming soon 

View full details

THE FLAGSHIP RUTHLESS SUBWOOFER.

4,500 WATTS. FOUR-INCH COIL. NEO MOTOR.

The Ruthless Neo 4″ VC is the full-send platform. Its four-inch four-layer coil, open-column Neo motor and five-layer progressive soft pack are built around high power handling, cooling and control for serious demo and competition systems.

Both 15-inch and 18-inch versions are available in dual 0.7-ohm and dual 1.7-ohm configurations, so the final choice should be made around the amplifier load, enclosure and electrical system—not just the size of the woofer.

WHY THIS SUB?

01

4,500W RMS

The highest-power Ruthless subwoofer platform currently in the lineup.

02

4″ FOUR-LAYER COIL

A massive coil platform designed to handle sustained high-power use.

03

NEO + COOLING

Open-column motor architecture, pole sleeve and aluminum compression cap focus on thermal control.

04

5-LAYER SOFT PACK

Progressive suspension built to keep the moving assembly controlled under heavy load.

VERIFIED PRODUCT DATA

THE NUMBERS.

RMS POWER4,500 WATTS
VOICE COIL4″ DIAMETER • 4-LAYER
MOTORFEA-OPTIMIZED NEO • OPEN-COLUMN COOLING
SUSPENSION5-LAYER PROGRESSIVE SOFT PACK
AVAILABLE SIZES15″ / 18″
IMPEDANCE OPTIONSDUAL 0.7Ω / DUAL 1.7Ω
BASKETEXTRA-HEAVY ALUMINUM
CONEKRAFT PULP FIBER REINFORCED
SURROUNDDUAL-LAYER WIDE FOAM
LEADS144-TINSEL COUNT
T/S PARAMETERSCOMING SOON — NOT YET PUBLISHED

THE ENCLOSURE IS PART OF THE SYSTEM.

BOX + POWER MUST MATCH.

Ruthless has not yet published the T/S parameters for these woofers, so we are not going to post generic enclosure numbers and pretend they are engineered for this driver. Final box design should account for the exact woofer, desired bandwidth, available space, power and vehicle.

If you are building before the full parameters are released, contact Ruthless before cutting wood.

ASK RUTHLESS →

BUILD THE WHOLE SYSTEM.

FEED IT REAL POWER.

A subwoofer at this level only performs as well as the amplifier, charging system, wiring, enclosure and setup around it.

SHOP RUTHLESS AMPLIFIERS →

MEASURED DRIVER DATA • D2 COILS

4″ VC NEO
T/S PARAMETERS.

All parameters below are measured data from the supplied Ruthless driver sheets and are for the D2 coil versions. Use the table that matches the exact 15″ or 18″ woofer being modeled.

15″ • 4″ VC NEO • D2MEASURED PARAMETERS
Fs30.247 Hz
Qts0.36168
Qes0.39534
Qms4.24780
Vas62.211 L / 2.197 ftÂł
Cms0.065 mm/N
Rms19.057 kg/s
Re3.3386 Ω
Zmax39.21 Ω
Zmin3.3386 Ω
η₀0.41519%
Le @ 1 kHz2.78800 mH
Le @ 10 kHz1.33247 mH
BL26.0895 N/A
Mms424.117 g
Sd0.082372 m²
Sensitivity88.2825 dB (1W/1m)
Sensitivity92.078 dB (2.83Vrms)
18″ • 4″ VC NEO • D2MEASURED PARAMETERS
Fs27.758 Hz
Qts0.39963
Qes0.44127
Qms4.2352
Vas136.2 L / 4.8141 ftÂł
Cms0.068 mm/N
Rms19.909 kg/s
Re3.5276 Ω
Zmax37.385 Ω
Zmin3.5276 Ω
η₀0.63%
Le @ 1 kHz2.7621 mH
Le @ 10 kHz1.4035 mH
BL26.047 N/A
Mms486.6 g
Sd0.11986 m²
Sensitivity90.093 dB (1W/1m)
Sensitivity93.649 dB (2.83Vrms)