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G4M 15" Passive Subwoofer

The G4M 15" Passive Subwoofer is a professional PA loudspeaker designed to provide low-frequency reinforcement for music and sound design applications. It features a high-output 15-inch woofer and offers a power handling capacity of 500W RMS and 1000W peak.

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Overview

The G4M 15" Passive Subwoofer is an essential component for sound reinforcement systems requiring dedicated low-end support. Designed for reliability and performance, it bridges the gap between smaller portable units and heavy-duty touring rigs. By offloading the lower frequencies from main full-range speakers, this subwoofer allows for a cleaner, more efficient soundstage in live environments.

As a passive unit, it requires an external power amplifier to operate. Its standard 8-ohm impedance ensures broad compatibility with a variety of professional power amps, while the inclusion of 2-pole Speakon connectors provides secure and standard industry connectivity.

Technical Specifications and Design

The core of the unit is a 15-inch woofer equipped with a 3-inch voice coil. This combination is engineered to handle substantial power while maintaining detailed transient response. The cabinet is designed to withstand the rigours of transport and features a 35mm stand pole connection on the top, allowing users to mount satellite speakers directly above the sub for a cohesive vertical array.

The technical specifications include: * Sensitivity: 96dB, indicating efficient conversion of power to acoustic output. * Frequency Range: 35Hz to 160Hz, covering the critical sub-bass and low-mid frequencies. * Connectivity: 2-pole Speakon input and output, allowing for parallel wiring of multiple units.

Sonic Character

The G4M 15" Subwoofer is characterised by a rich and deep bass response. Unlike smaller subwoofers that may struggle with the lowest octaves, the 15-inch driver provides the necessary surface area to move significant air, resulting in a physical and detailed low-end. The 35Hz lower limit ensures that even modern electronic music and cinematic sound designs are reproduced with clarity and punch.

Applications and Compatibility

This subwoofer is suitable for mobile DJs, live bands, and permanent installations in venues such as bars or small clubs. Because it is a passive speaker, it is ideally suited for users who already own power amplifiers or prefer a modular system where the amplification is housed separately from the speaker cabinets.

For a complete PA setup, it can be integrated alongside active or passive tops. While it provides the low-end foundation, it would typically be paired with mid-high speakers like the SubZero C10M or active alternatives such as the dB Technologies B-Hype 15 for a full-spectrum audio solution.

Market Comparison

Within the current market, the G4M 15" Passive Subwoofer occupies a competitive position for users seeking high power handling at a budget-conscious price point. Compared to active models like the QSC KLA181 or the SubZero P15X, this G4M model offers a simpler, lighter cabinet without internal electronics, which many sound engineers prefer for easier maintenance and system scaling. While it lacks the DSP found in active units like the RCF NX series, its raw performance and 1000W peak capacity make it a robust choice for traditional analogue-heavy signal chains.

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Frequently asked questions

Is the G4M 15" Passive Subwoofer active or passive?
It is a passive subwoofer. This means it does not have an internal amplifier and requires an external power source to function.
What is the RMS power rating of this speaker?
The speaker has a power handling capacity of 500W RMS. This represents the continuous power it can handle over long periods.
What is the peak power handling?
The peak power handling is 1000W. This allows the speaker to handle short bursts of high-intensity sound without damage.
What is the frequency response of the unit?
The frequency response ranges from 35Hz to 160Hz. This ensures deep bass coverage for music and sound design.
What size is the voice coil?
The unit features a 3-inch voice coil. Large voice coils are beneficial for handling higher temperatures and maintaining audio clarity at high volumes.
What is the impedance of this subwoofer?
The speaker has an impedance of 8 ohms. This is a standard rating that makes it compatible with the majority of professional power amplifiers.
What type of connectors are used on the G4M 15" Subwoofer?
It uses 2-pole Speakon input and output connections. These are industry-standard for secure and reliable audio signal transmission.
Can I mount a satellite speaker on top of this sub?
Yes, it features a 35mm stand pole connection on the top. This allows you to insert a standard speaker pole to mount a top speaker above the sub.
What is the sensitivity rating of the speaker?
The sensitivity is 96dB. This rating indicates how loud the speaker will be at a certain power level, with 96dB being efficient for a 15-inch driver.
Is this subwoofer suitable for home use or professional PA use?
It is primarily designed for professional PA applications. While it can be used at home, its size and power are intended for venues, live performances, and sound design studios.
Does this unit include a built-in crossover?
The manufacturer specifications do not list an internal crossover. In a passive setup, it is generally recommended to use an external crossover or a dedicated subwoofer output from an amplifier.
Can I daisy-chain multiple G4M 15" subwoofers together?
Yes, the presence of both Speakon input and output connections allows for parallel linking of multiple speakers. Ensure your amplifier can handle the resulting lower impedance when doing so.