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Note about subwoofers with balanced BTL amp

Posted by AbeCollins on May 6, 2022 at 06:57:21:
Rod if you use a subwoofer connected to the amp's speaker terminals [not just REL brand]:
"Its important to note that the Stellar Amplifier is a fully balanced BTL amplifier. As such, the Black terminal is not ground. If connecting the Stellar S300 to a REL Acoustics subwoofer, it's important to consult the manufacturer's service documentation to ensure the S300 is appropriate for the subwoofer."
If you use line out from your preamp [or LFE] this obviously does not apply.