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.
Bit
In computer and digital terminology a bit is the smallest unit of data. It is expressed in binary notation so that it is either 0 or 1 - basically an 'off' or an 'on' switch. The word 'bit' is an amalgam of 'binary' and 'digit'.
Built-in digital surround decoder
A portable with a built-in decoder means that you don't need a Dolby Digital or DTS processor - simply connect it to any mul-channel amp for digital surround sound.
BONUSVIEW (Final Standard Profile)
An advanced function that creates a range of exciting new entertainment possibilities. It opens the door to new functions such as Picture-in-Picture (which displays a second image in a subwindow) and Audio Mixing (which lets you switch the sound between the main and sub windows). * Actual functions vary depending on the Blu-ray disc media.