the box pro Achat 115 Sub
15" Subwoofer
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Available since November 2009
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Item number 230515
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Sales Unit 1 piece(s)
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Impedance in Ohms 8 Ohms
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Number of Woofers 1
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Woofers in Inch 15"
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Colour Black
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Width 550 mm
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Height 435 mm
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Depth in mm 680 mm
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Weight in kg 30 kg
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Construction Type Direkt Beamer
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IP Class non
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RMS Power 500 W
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Flyable No
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Wheels No
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SPL in dB 130 dB
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Housing Material Wood
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Flange M20
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Input Speaker Twist
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Output Speaker Twist
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Frequency range from 45 Hz
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Frequency range to 200 Hz
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Powerful 15" subwoofer for scalable PA setups
The Achat 115 Sub is a powerful, passive 15" subwoofer from Thomann's in-house brand, the box pro. It's designed for mid-sized sound systems that demand more output and headroom. As a passive subwoofer, it needs to be driven by an external power amplifier, making it suitable both for users building a classic PA setup and for anyone looking to expand an existing system. Because the Achat 115 Sub is powered directly by the amp, it doesn't need its own mains connection. That keeps cabling straightforward and makes it particularly well suited to centrally amplified or modular systems. The cabinet itself is built from robust wood and finished in a durable matte black textured coating, so it stands up well to regular transport. One notable feature in this class is the pair of M20 pole mounts on the top panel, which make it possible, where needed, to mount two top speakers on a single subwoofer – a practical option for compact stereo setups where floor space is limited.
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Full system-focused integration
The Achat 115 Sub delivers a punchy, clearly defined bass response across a range of around 45 to 200Hz. The three locking NL4 connectors are configured with externally managed systems in mind: The full-range input takes the unprocessed signal from the amplifier, while the full-range thru passes that signal on unchanged, for example to another subwoofer or further along the signal chain. The X‑OVER input, meanwhile, expects a pre-filtered low-pass signal, typically from an external DSP or crossover. In this configuration, the subwoofer operates as part of a full frequency-managed system. Unlike smaller models in the range, the Achat 115 Sub does not include an internal crossover for top speakers, so using an external crossover or DSP controller is recommended for standard PA setups.
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More headroom, greater reach
With a power handling of 500W RMS, a maximum SPL of 129dB and a weight of around 30kg, the Achat 115 Sub offers significantly more headroom than smaller models in the series and is well suited to applications with larger audiences. It contributes a solid, weighty low-end foundation and helps the overall mix cut through more effectively. That makes the sub a good fit for live bands, DJs, and venues where higher output and greater coverage are needed. In typical configurations using two subwoofers alongside suitable top speakers, the Achat 115 Sub has enough power to cover audiences of around 200 people – and depending on the space, often more. The cabinet features two very sturdy side handles for transport, and it can also be fitted with castors (sold separately). This makes on-site setup easier and improves handling considerably in situations where the system is moved regularly.
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About the box pro
For over 20 years, products from the box pro have enriched Thomann’s comprehensive range. If you are looking for small robust speakers, drum monitor systems, active bass speakers, column systems, active full-range speakers, line arrays, or limiters at a reasonable price, you can be sure that the box pro has you covered. These products are made exclusively by renowned companies who also manufacture products for other well-known brands – so if you are looking for brand quality at a budget-friendly price, you are certainly in good hands with around 200 articles from the box pro.
A solid base for larger, professional systems
With its broad usable frequency range, the Achat 115 Sub can be paired flexibly with a wide variety of top speakers and runs comfortably at higher crossover points. This is particularly useful when working with compact 10" or 12" tops, which invariably benefit from being relieved of low-frequency duties. Because it's designed for externally managed systems, the sub is best used with a suitable amplifier and a DSP controller, such as a the t.racks Achat DSP 2/4. This allows users to adjust crossover points, levels, and tonal balance precisely to suit the room, the setup, and the sound source. With its combination of output headroom, robust construction, and the ability to deploy multiple units together, the Achat 115 Sub works both as an entry point into more capable PA setups and as a scalable building block for anyone targeting a controlled expansion of their existing systems.