These are two very different sounding units. I would unhesitatingly choose the Conrad Johnson. Musical sound is what I want... and that is what you get with Conrad Johnson. Details in proportion to real music with good midrange bloom. I would not worry about single ended vs balanced. I have used both extensively... it is the sound of the component that is critical, far more than the connection type. Also, single ended high end audio interconnects can be much cheaper... especially used. Here also, the interconnect sound quality it generally more important than the connection type.
I ran an AI comparison. To me the description of the Backart is of a sparkly "high end" sounding, unmusical preamp. But it is your tastes that you must satisfy.
The Conrad-Johnson ET-6 SE is known for its warm, tube-like sound signature with a hint of neutrality, while the Backert Labs 1.4 Rhumba Extreme is praised for its dynamic and punchy sound, with a focus on clarity and transparency.
Here’s a more detailed comparison:
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Conrad-Johnson ET-6 SE:
- Sound Signature: Warm, tube-like sound with a hint of neutrality.
- Tone Control: Features a cool tone control for system tuning.
- Soundstage: Holographic with great bass and dynamics.
- Overall: Known for its ability to create a natural and engaging listening experience.
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Backert Labs 1.4 Rhumba Extreme:
- Sound Signature: Dynamic and punchy with a focus on clarity and transparency.
- Dynamics: Known for its ability to reproduce a wide dynamic range.
- Overall: Favored for its ability to deliver a clean and detailed sound, with a strong emphasis on impact and precision.