SORRY FOR MY PERVIOUS POST, IT'S (( MARANTZ CD 5003 )) I have a HIFI system: ( Harman Kardon HK3480 Stereo Receiver) ( a pair of Infinity Alpha 50 Speakers ) ( Marantz CD 5003 CD player ). Amplifier I had YAMAHA CDX-496 CD player, which I recently replaced it with ( Marantz CD 5003 ). There is a ( Low Pass Filter ) build in this Marantz. As per my information about ( low Pass Filter ) that this kind of filters will allows only the low frequencies through and will block the high frequencies. In another word ( it will let low frequencies pass but boost or cut the high ones ). And it relevant to (subwoofer) only or say mostly, so this filter should work with subwoofer. May question is : I don't have subwoofer, I've only a pair of floor stand big speakers, so does this Filter will affect my 4 ways speakers ( 1- Tweeter 1" / 1 -Midrange 5.25" / 2 -woofers 8" ) ? And if it does, in which manner ? I'm already feeling that the low bass frequencies are too high, and not happy for this. I'm a soundtrack collector I don't need too much low bass, I love the Midrange frequencies. Is it true that this filter is affected my speakers already , our it's just what I feel/assume that it does, and that could be because I red that there is this filter in my CD player ?!!!