Dear Bryston,
I am going to be purchasing a ULS-15 subwoofer from HSU Research within the next few months and have a question about connecting it to my Bryston 4B SST amp through the high-level speaker inputs.
With regards to High Level speaker inputs the ULS-15 manual states:
"Use this method only if you do not have any other choice. Integrated amplifiers or stereo receivers with no pre-outs fall in this category.
The subwoofer will operate in bass augmentation mode. i.e., the main speakers will be running full-range. You dial in the subwoofer to
come in just where the main speakers start to fade out. Since the subwoofer uses its own amplifier, and has a high input impedance, it
will not alter the loading on your main amplifier.
It is important to know if your controller has true ground or not. Bridged amplifiers, and amplifiers like Carver (which inverts phase to
one channel making their black terminal on one channel the signal instead of ground) should not be used. Similarly, digital amplifiers
that have unfiltered outputs are also not suitable.
Since the subwoofer will not be drawing any significant current, any gauge wire will do. No need for heavy gauge wires."
I believe the 4B SST has a true ground can James please confirm.
Thank you,
John
