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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
emailists
933 posts
 

I used to run high level input from my BHK300 (hybrid monoblocks) fed from all tube 2 box preamp, to a pair of Velodyne DD10+ on 22" Sistrum stands, coming in from 40Hz on down. 

Then i decided to run from the preamps extra XLR outs and found it to be more articulate.  

I’m auditioning a new solid state preamp now and haven’t yet tried the high level connection, but the XLR from the preamp is giving me the most articulate, fastest deepest bass I have ever experienced, and they match up well with the extremely fast electrostatic bass I’m getting from my new Prodigio WR1’s.  

I also suggest people try getting their subs off the floor.  I’ve found better articulation with them off the floor.

The Velodyne actually allows you two combine both inputs, the high level and the line level, as there are trim pots for each.  

macg19
1,437 posts
 

@richardbrand from twaddle to reason.

Well done mate.

thehybridvigor
16 posts
 

@bartsw The high level signal is already analog. Doing DSP downstream of this requires 2 additional conversions. Analog to digital and back to analog. It's possible but not best practice 

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