B-EX extends the low frequency 'reach' of your amplifier and speakers. Whist your amplifier maybe capable of a flat response down to 20 or 30Hz, your speakers are not. It's a special type of pre-amp with a very specific frequency response. It rolls "up" the low-frequency signal below 150Hz to offset the speaker's natural roll-off. This gives a flat response down to 50Hz and in some cases, beyond.

B-EX can negate the need for a bulky subwoofer - read more..

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