Also called ported or vented, these boxes come in several configurations. Although ported enclosures aren't typically as good at playing the lowest frequencies, they tend to have higher-than-average efficiency and therefore require less power to achieve a given volume.
A vented enclosure that allows control of rear radiated sound waves.
When a loudspeaker produces sound, volumes of air move around inside its cabinets. Big air shifts mean bigger bass. But smaller speakers do not have the physical dimensions to create trouser-flapping lower frequencies. This where a bass reflex port comes in. This is a vent which forces air out from inside the cabinet. Forcing air out in such as way can help smaller speaker enclosures deliver more impactful bass.
A speaker design using air-flow from a port in the cabinet to help low frequencies.
A loudspeaker design which uses air-flow from a port in the cabinet to help reproduce low frequencies.
a popular enclosure design that uses a tuned port to extend a loudspeaker's bass response by allowing some of the air movement from a woofer cone's rear motion to combine with the bass frequencies from the cone's front movement. However, to avoid phase cancellation from occurring when these signals are combined, the port length and diameter must be carefully matched (tuned) to the speaker's free-air resonance and the enclosure volume.
Any speaker system that utilizes a hole, or "port" in its enclosure to tune the cabinet's resonant frequency.
A type of loudspeaker whose low-frequency response is augmented by sound waves emerging from within the cabinet via a port or freely suspended cone. Also called a 'ported ' or 'vented ' speaker.
A speaker enclosure in which the speaker's rear sound wave is projected through a specially designed port (tube) in the baffle to reinforce the low frequency range. Below the tuned frequency bass response drops more dramatically than if no port were used.
A speaker that, as a means of enhancing the efficiency of the reproduction of bass frequencies, channels some of the sound pressure generated by its woofer(s) through an opening (port) in its cabinet.
A type of speaker enclosure that includes a "tuned" port to increase and extend bass response (by releasing some of the energy created by the inward movement of the woofer cone). Bass reflex designs are more power-efficient than acoustic suspension designs - they'll play louder than an acoustic suspension speaker when driven with the same amplifier power. But they may sacrifice some bass accuracy in exchange for the added bass output.
A low-frequency loudspeaker enclosure design in which the volume of the enclosure and the dimensions and shape of a vent, or port, form a Helmholtz resonance which is designed to integrate with the performance parameters of a woofer. Such systems are characterized by increased acoustical output at certain frequencies near the system resonance, less output at lower frequencies, and the potential for reduced distortion at high sound levels.
A speaker-box design that makes use of a port or drone cone. According to parameters outlined by Thiele and Small more than twenty years ago, allows the rear radiation of a woofer cone to reinforce the output of the front, extending and smoothing low-range response. At frequencies below the reinforcement range, there will be a sharp cutoff as the port signal goes back out of phase with the front.
A speaker design whereby a port in the cabinet helps to deliver better bass reproduction
A woofer enclosure that has a vent/port, allowing the rear wave of the woofer to combine with the front wave. Referred to as a vented and/or ported enclosure.
A type of loudspeaker that uses a port or duct to augment the low-frequency response. Opinions vary widely over the "best" type of bass cabinet, but much has to do with how well a given design, such as a bass reflex is implemented.
A type of box loudspeaker whose bass output is supplemented by a port (a hole or tube) tuned to a particular frequency to extend bass below the resonant frequency of the bass drive unit, and to help improve the overall loudspeaker sensitivity.
Woofer loading typology; the woofer works in coupled volumes through a port.
A vented enclosure in which a woofer's back wave emerges through a port to reinforce low frequency output.
A popular type of loudspeaker enclosure in which an open port at the front or rear baffle allows internal air pressure to reinforce bass response.
A Bass reflex system (also known as a ported, vented box or reflex port) is a type of loudspeaker enclosure that uses the sound from the rear side of the diaphragm to increase the efficiency of the system at low frequencies as compared to a typical closed box loudspeaker or an infinite baffle mounting.