I have a pair of GoldenEar Triton 1 speakers, which have built-in subwoofers. Evidently, the right subwoofer lead fell off the speaker some time ago without my knowledge. I’ve been listening for quite a while with only one subwoofer, really enjoying the sound in blissful ignorance. Everything sounded great including pieces with deep bass such as formidable organ recordings.
Today I discovered the plug out of the wall and plugged it back in. The system immediately closed up, became dull, lacking ambiance. I pulled the plug back out. Sound was wonderful. Everything sounded just right, including the bass which was full and rich.

I’m now listening without the right subwoofer for good.




The power cord fell off the subwoofer.
I mis-spoke calling it a lead.

Just a thought…

With two subs active now you’re probably exciting the room bass nodes and the added bass just overwhelms the rest of the frequency range. 
Dial the bass output down on both speakers until you get tight bass that doesn’t overpower the mids and highs.

I’ve experienced this with the Martin Logan Montis speakers that also feature powered woofers. 

you can use low frequency test tones to dial in your bass output.