LFE or Line-In?

DVOuSS

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.

nwohlford

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.