Subwoofer for TACT digital amp
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,
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
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?