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Would like a subwoofer BUT:
"TacT 2150 puts out an analog signal at their output terminals that is positive at the red terminal while neutral at the black or for the negative halfwave positive at the black and neutral at the red. This is equivalent to the AC voltage of an average amplifier, but:
Both terminals have their neutral at half working voltage, which may appear up to 29 Volts DC. Variation of volume level is mainly done by changing the working voltage. You can expect a voltage between 3 V and 29 V DC on either terminal
Never connect the black output terminal to any equipment ground like any active subwoofer. Even passive subwoofers use one common negative pole if for cost reason a single voice coil bass unit is chosen. Both negative poles for L and R channel are connected to common ground which would short circuit L and R channels of the digital amplifier at the black terminals L to R channel.
If the active subwoofer has ground connected to safety earth, the short circuit will be between both L and R to ground. This case is even more severe because half of Millennium (or 2150) is working against ground then.
This short circuit may lead to destruction (with conventional amps in bridged mode) or the amp will go into protection mode."
What to do?
I might add that TACT is run without a preamp, with digital sources directly into it and no analogue input/
If you are using a non-powered subwoofer with direct input, the driver would be connected just as any other speaker and "float" on the balanced DC output.
If you are using a powered subwoofer, you might be able to find a suitable transformer to adapt the output to its line level input. Of course, the you would have redundant amps in line.
Sorry to be so technically ignorant, but does this mean there is no plug&play solution?
Not that I can think of.
A powered sub with a high-level (speaker line) input might work but you would have to hope that the input circuitry could tolerate the DC offset.
Perhaps you could send this information to a couple of subwoofer manufacturers of your choice and ask them if their subs could handle it.
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