What is the RMS power rating of the SubZero C15A?

The SubZero C15A has a continuous power output of 280W RMS. This represents the sustained power the amplifier can deliver safely over time.

Can I connect an additional speaker to the C15A?

Yes, it features a 2-pole extension speaker output. This allows you to connect a passive speaker directly to the C15A to create a larger stereo system.

What size is the woofer in this model?

The C15A is equipped with a 15-inch long-throw woofer. This size is typically preferred for its ability to move more air and provide richer low-frequency response.

Does the C15A include an equaliser?

Yes, the rear panel features a 3-band EQ. Users can manually adjust the Bass, Middle, and Treble frequencies to suit the room or the audio source.

What type of tweeter does the C15A use?

This speaker utilizes a piezo tweeter for high-frequency reproduction. Piezo tweeters are known for being robust and not requiring a crossover, making them reliable for portable PA use.

What inputs are available on the built-in mixer?

The speaker includes flexible mic/line inputs. These typically accommodate XLR, 1/4" jack, and RCA connections for various audio sources like mixers, mics, or instruments.

Is the SubZero C15A an active or passive speaker?

It is an active speaker, meaning it has a built-in amplifier. You do not need an external power amp to run it; you simply plug it into a mains power source.

What is the peak power handling of the C15A?

The speaker has a peak power rating of 700W. This indicates the maximum power the speaker can handle in very short bursts.

What kind of finish does the cabinet have?

The cabinet is finished with a durable carpet covering. This is designed to protect the wood underneath and handle the rigours of frequent transport.

Can I send the audio signal to another device from the speaker?

Yes, there is a Line Out channel on the rear panel. This allows you to daisy-chain the audio signal to another active speaker or a recording device.

How does this compare to the SubZero P15X?

The P15X generally includes built-in DSP (Digital Signal Processing) presets. The C15A is a more traditional analogue-style active speaker with a carpet finish and 3-band EQ.

Is this speaker suitable for use as a floor monitor?

While primarily designed as a standalone PA speaker, its design allows for versatile placement. However, dedicated monitors like the SubZero C10M are often more specifically angled for that purpose.

Gear article

SubZero C15A 700W Active PA Speaker

The SubZero C15A is a 15-inch active PA speaker designed for portable sound reinforcement, delivering 280W RMS and 700W peak power. It features a carpet-covered cabinet, a built-in three-channel mixer, and a 2-pole extension output for powering an additional passive loudspeaker.

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Overview

The SubZero C15A is an active sound reinforcement solution positioned in the budget-friendly category, typically retailing around £180. It is engineered for users who require a portable yet powerful unit capable of handling full-range audio for live performances, public speaking, and small-to-medium venues. The C15A is distinguished by its 'long-throw' 15-inch woofer and a rugged, carpeted aesthetic common in traditional PA systems.

Design and Hardware

The unit employs a two-way design consisting of a large 15-inch low-frequency driver paired with a piezo tweeter. The cabinet is constructed with durability in mind, featuring a carpet covering that protects against scuffs and scratches during transport. A sturdy metal grille protects the drivers, and side-mounted handles are integrated for easier carriage. The rear panel houses the amplification module and control interface.

Amplification and Connectivity

Driven by an efficient amplifier module, the C15A provides 280W of continuous power (RMS) with a 700W peak capability. One of its standout functional features is the integrated mixer, which offers flexible inputs for microphones and line-level devices.

Users can adjust levels independently and sculpt the master output using a built-in 3-band equaliser (Treble, Middle, and Bass). Uniquely for an active speaker in this class, it includes a 2-pole extension output. This allows the internal amplifier to drive a secondary passive speaker, facilitating a stereo setup without the need for an additional external power amplifier.

Market Position and Alternatives

The SubZero C15A competes primarily in the entry-level professional audio market. While it lacks the digital signal processing (DSP) found in the SubZero P15X, it offers a more traditional analogue interface and a ruggedised carpet exterior.

When compared to more expensive alternatives like the RCF ART 735-A MK5 or the dB Technologies B-Hype 15, the C15A prioritises value and simplicity. While those models may offer higher SPL or advanced plastic enclosures, the C15A provides a cost-effective solution for users who need a large 15-inch driver at a fraction of the cost.

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Frequently asked questions

What is the RMS power rating of the SubZero C15A?: The SubZero C15A has a continuous power output of 280W RMS. This represents the sustained power the amplifier can deliver safely over time.
Can I connect an additional speaker to the C15A?: Yes, it features a 2-pole extension speaker output. This allows you to connect a passive speaker directly to the C15A to create a larger stereo system.
What size is the woofer in this model?: The C15A is equipped with a 15-inch long-throw woofer. This size is typically preferred for its ability to move more air and provide richer low-frequency response.
Does the C15A include an equaliser?: Yes, the rear panel features a 3-band EQ. Users can manually adjust the Bass, Middle, and Treble frequencies to suit the room or the audio source.
What type of tweeter does the C15A use?: This speaker utilizes a piezo tweeter for high-frequency reproduction. Piezo tweeters are known for being robust and not requiring a crossover, making them reliable for portable PA use.
What inputs are available on the built-in mixer?: The speaker includes flexible mic/line inputs. These typically accommodate XLR, 1/4" jack, and RCA connections for various audio sources like mixers, mics, or instruments.
Is the SubZero C15A an active or passive speaker?: It is an active speaker, meaning it has a built-in amplifier. You do not need an external power amp to run it; you simply plug it into a mains power source.
What is the peak power handling of the C15A?: The speaker has a peak power rating of 700W. This indicates the maximum power the speaker can handle in very short bursts.
What kind of finish does the cabinet have?: The cabinet is finished with a durable carpet covering. This is designed to protect the wood underneath and handle the rigours of frequent transport.
Can I send the audio signal to another device from the speaker?: Yes, there is a Line Out channel on the rear panel. This allows you to daisy-chain the audio signal to another active speaker or a recording device.
How does this compare to the SubZero P15X?: The P15X generally includes built-in DSP (Digital Signal Processing) presets. The C15A is a more traditional analogue-style active speaker with a carpet finish and 3-band EQ.
Is this speaker suitable for use as a floor monitor?: While primarily designed as a standalone PA speaker, its design allows for versatile placement. However, dedicated monitors like the SubZero C10M are often more specifically angled for that purpose.