LFE vs High-level subwoofer connection, for FIDELITY


Simple as it sounds. What subwoofer connection method offers higher fidelity, and why? The LFE, 75 ohm unbalanced RCA cable. Or high-level, speaker wire to the binding posts of the amp. I am running 2 KEF KC92 subwoofers to a Soul Note A-2 Ver. 1 amplifier.
 

Grok Ai states it matches your speakers tonal balance, timing cues, and sonic signature, because it shares the same signal path through the amplifier that your speakers sound travels through. It’s also a great way to get tube or amp sound into your bass region. My LFE outputs from my Khozmo Acoustics pre-amp, bypassing the amplifiers elite and favorable sound.  The PS audio subwoofer had not been released yet or I’d have swoope those up, instead of the KEFs.

Also, has anyone heard that it is straining or damaging to a truly balanced, direct coupled amplifier to use high level inputs? This was mentioned to me and I can’t recall how reliable a source it came from. 

jbuddha882

@kr4 

but can't correct main and sub separately in the overlap region

It does knock down the overlapping frequencies affecting both the speaker and sub. But it measures the same as using bass management. It sounds just as good but it's soooo much easier not needing bass management and having to throw away $1200 for Dirac. Calibration is also a faster and shorter process. Also, newer subs have their own EQ so you can still manually adjust it separate from the speaker after or before running room correction. Also my B&W subs have defined settings to match the speakers. Overall, there's pros/cons with both bass mgmt and high level.

@kr4 ”getting tube sound in the bass region” 

I am using bookshelf speakers, ELAC S503 ‘s, and they don’t have the strongest bass. I also have a really nice tube preamp, with real good NOS Raytheon and Mullard tubes. I really wanted to hear what tube changes affected what in the bass region. Hence. I wanted the subs signal feed, at the very last part of my component signal path, so I’d get the flavor of the tubes.

@bartsw im looking at an anthem SA35 to get Dirac live in a system, to compare to my reference system, Cuz Dirac works so damn well on my Onkyo AV. BUT audiophiles usually scoff at that. And idk any balanced component I could put in my component stack, that has room correction. Minus $10k+ preamps like the Trinnov Amathyst that have room correction