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Thread: LFE or Line-In?

  1. #1

    Member Sales Rating: (1)

    Join Date
    May 2010
    Humble, TX

    Default LFE or Line-In?

    Ok, I don't post here much and one of my posts that I posted a while back was stating that when I bought the MicroPro 4000, the bass was loose, exaggerated, and very weak. The driver flexed a lot, and produced minimal usable bass. Upon the recommendation of other CP members I tried changing locations, receiver settings, sub settings, and numerous other things. With Polk's room correction, I dialed it in a little but the bass was still not what I expected from a $1700 sub. Anyway, long story short, I bought another MP4K from another member, and hooked the two subs up. BLAMO!!! Bass for days. Clear, precise, awesome bass. I thought it was because I now had 2 awesome subs. Skip to present time. Last week I cut out some sheetrock and ran all my wiring in the wall and patched the holes. Hooked the subs back up....sounds like a$$. You know why? LFE. If I use the LFE input on the subs, the sound produced is subpar at best. Plug the sub cable into the "Line In"...perfect sound...deep powerful bass. Why? I haven't been able to find a clear answer to my question. I know with all the experience in CP someone will be able to educate me...thanks in advance.
    Living Room
    Toshiba 55" 240HZ LCD
    Onkyo TX-NR807
    Emotiva XPA-5
    Polk Audio LSi 25 - Mains
    Polk Audio LSiC - Center
    Polk Audio LSi 9 - Surrounds
    DSW microPRO 4000 x2 - Subs

    Media Room
    Mitsubishi 73" DLP
    Onkyo TX-SR875
    2 x JBL Urei S300 Amplifiers
    2 x JBL Urei S150 Amplifiers
    JBL Synthesis Three S3M - Mains
    JBL Synthesis Three S3HC - Center
    JBL Synthesis Three S3S - Subs
    JBL Synthesis Two S2A - Surrounds

  2. #2

    Member Sales Rating: (0)

    Join Date
    Feb 2004


    The main difference usually is that LFe bypasses the subs internal crossover and line in does not. If you send a full range signal to the Lfe input the sub will sound horrible because the sub is not meant to play full range.

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