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  2. Acoustic suspension - Wikipedia

    en.wikipedia.org/wiki/Acoustic_suspension

    The ported cabinet demonstrates increased bass output in the 50–100 Hz range. On the right is a simulation of the low-frequency response of a typical 5" mid-woofer, the FaitalPRO 5FE120 [8] mid-woofer generated, obtained using WinISD, [9] for ideal sealed (yellow) and ported (cyan) enclosure configurations. The ported version adds about an ...

  3. Transmission line loudspeaker - Wikipedia

    en.wikipedia.org/wiki/Transmission_line_loudspeaker

    A loudspeaker enclosure based on the concept was proposed in October 1965 by Dr A.R. Bailey in Wireless World magazine, referencing a production version of an acoustic-line enclosure design from Radford Electronics Ltd. [16] The article postulated that energy from the rear of a driver unit could be essentially absorbed, without damping the cone ...

  4. Loudspeaker enclosure - Wikipedia

    en.wikipedia.org/wiki/Loudspeaker_enclosure

    This enclosure type is very common, and provides more sound pressure level near the tuning frequency than a sealed enclosure of the same volume, although it actually has less low frequency output at frequencies well below the cut-off frequency, since the rolloff is steeper (24 dB/octave versus 12 dB/octave for a sealed enclosure).

  5. Bass reflex - Wikipedia

    en.wikipedia.org/wiki/Bass_reflex

    Bass reflex enclosure schematic (cross-section). RCA bass reflex shelf stereo speakers.. A bass reflex system (also known as a ported, vented box or reflex port) is a type of loudspeaker enclosure that uses a port (hole) or vent cut into the cabinet and a section of tubing or pipe affixed to the port.

  6. Acoustic transmission line - Wikipedia

    en.wikipedia.org/wiki/Acoustic_transmission_line

    The Transmission line type of loudspeaker enclosure was proposed in October 1965 by Dr A.R. Bailey and A.H. Radford in Wireless World (p483-486) magazine. The article postulated that energy from the rear of a driver unit could be essentially absorbed, without damping the cone's motion or superimposing internal reflections and resonance, so ...

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  9. NEMA enclosure types - Wikipedia

    en.wikipedia.org/wiki/NEMA_enclosure_types

    Below is a list of NEMA enclosure types; these types are further defined in NEMA 250- Enclosures for Electrical Equipment. Each type specifies characteristics of an enclosure, but not, for example, a specific enclosure size. Note that higher numbers do not include the lower-numbered tests. For example, types 3, 4 and 6 are intended for outdoor ...

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