Port bungs

WARNING: Care must be taken not to insert the port bungs too far into the port as this may result in the foam bung being lost inside the cabinet.

If the loudspeaker is to be used in a small room, typically 9 sqM (80 sqFT) or a room that is known to reproduce accentuated bass response, it may be desirable to fit the port bungs. However, before this is done it is worth experimenting with the positioning of the loudspeaker in the room. To reproduce the optimum performance from the loudspeaker it is important to make sure the loudspeaker is not positioned too close to a wall (typically 150mm / 6” from the back of the cabinet) or near corners of a room (typically 1M / 3FT).

If the room is larger than detailed above and no problems are known, please read point 1. If the positioning of the loudspeaker is predetermined by room aesthetics or layout, please move on and read point 2 for the BX1/ BX2 and point 3 for the BX5/ BX6.

Port bungs might not be necessary on the BX2 even if placed close to a rear wall due to the front firing port tube. Experimentation is still highly recommended though.

1.If you can adhere to the room characteristics detailed above we recommend that you do not fit the port bungs to achieve the best performance. However you may feel that by fitting the bungs even under these circumstances provides you with a degree of fine-tuning to suite particular taste. Experimentation is highly recommended.

2.Where a bookshelf/ stand-mount speaker with a rear firing port tube (BX1) is to be used in close proximity (2”, 50mm) to a rear wall such as on a bookshelf, positioned in a cabinet or mounted on a wall, we recommend fitting the port bungs to the ports. This will reduce the bass ‘boom’ sometimes termed as overhang, and assist the loudspeaker to reproduce its best performance under the environmental constraints. ‘Boom’ is generally caused when bass energy from the loudspeaker ‘excites’ room modes and causes an accentuation at a particular frequency, or number of frequencies.

3.Where a floor-standing loudspeaker (BX5 & BX6) is to be used in close proximity (closer than 150mm 6”) to a rear wall, we recommend fitting the port bungs. This will reduce the bass ‘boom’ sometimes termed as overhang and assist the loudspeaker to reproduce its best performance under these environmental constraints. This is caused when bass energy from the loudspeaker ‘excites’ room modes and causes an accentuation at a particular frequency, or number of frequencies.

Where the loudspeaker has two ports per speaker, BX5 and BX6, a further degree of fine-tuning is provided. In this case you have three options; to leave all the ports open (point 1), fit the port bungs to the rear ports or to fit a port bung to the front port. We recommend that you experiment with fitting the port bungs to the rear port or the front port in succession as the results can vary dependant on room acoustics and positioning. The overall bass extension will not be reduced, however the bass energy/ output around the port tuning frequency will be reduced. This has the effect of reducing bass ‘boom’ increasing bass clarity and apparent agility. Experimentation is highly recommended.

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Monitor Audio BX Series owner manual Port bungs
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BX Series specifications

The Monitor Audio BX Series is a renowned line of speakers celebrated for its exceptional audio performance, versatility, and aesthetic appeal. Designed to cater to the needs of discerning audiophiles and casual listeners alike, the BX Series brings forth a range of innovative technologies and features that enhance sound quality and user experience.

One of the standout features of the BX Series speakers is their use of advanced driver technology. Each speaker incorporates Monitor Audio’s proprietary C-CAM (Ceramic-Coated Aluminium/Magnesium) driver technology. This material is known for its rigidity and lightness, enabling drivers to deliver accurate sound reproduction across a broad frequency range. The C-CAM domes are meticulously crafted to ensure minimal distortion, resulting in clear mids and highs that are ideal for music and movie applications alike.

The BX Series also employs a sophisticated cabinet design, engineered to minimize resonance and enhance sound clarity. The cabinets are made from high-quality MDF (Medium-Density Fiberboard), which is both sturdy and acoustically inert, allowing for a more pure sound without unwanted coloration. The elegant finishes available in the BX Series, including real wood veneer, further contribute to its aesthetic appeal, making these speakers a stylish addition to any home décor.

Another notable characteristic of the BX Series is its versatility in configuration. The lineup includes a variety of models, from compact bookshelf speakers to larger floor-standing units, accommodating a wide range of listening environments. This makes it easy to find the perfect fitting speaker for any living space without compromising on sound quality.

Connectivity and user-friendly features are also integral to the BX Series. Many models in the lineup include multiple inputs, allowing seamless integration with various audio sources, from traditional stereo systems to modern digital setups. This flexibility ensures that the BX speakers can adapt to the user’s lifestyle and preferences.

In terms of performance, the BX Series excels in providing a balanced soundstage and dynamic range. Whether you’re listening to your favorite music or enjoying a film, the immersive audio experience created by these speakers transforms everyday listening into something extraordinary.

In summary, the Monitor Audio BX Series stands out for its combination of advanced driver technology, elegant design, and versatile application. With their ability to deliver audiophile-quality sound in a stylish package, the BX Series speakers are a worthy investment for anyone serious about audio performance.
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