I have owned both the AQ Niagara 72V DBS ICs and the Synergistic Research Tesla (various models) & Element-series actively-shielded cables. Both apply DC power to the dielectric, albeit by different designs (battery vs "MPC" wall wart power supply). I found both to sound excellent and sold me on the notion of charging the dielectric for improved sound quality, most notably the improvement in reducing the noise floor.
The AQ method provides a much cleaner installation with the battery packs attached to the cable and no external wiring, but the SR active-shielding allows tuning of the power source (via cost-effective mods to the MPC by fellow-member Michael Spallone) and changing the Tuning Bullets (introduced with the Tesla SE and carried on to the Element series).
Michael’s mods were a step-function improvement in sound quality across the board and the SR tuning bullets provide audible changes in the upper-frequency character of my system. Very nice to have the ability to slightly alter/tune the highly-hearing-sensitive upper-frequency region where the enjoyment of cymbals and female vocals is especially sensitive (to me) to open-ness and also glare depending on the individual system’s proclivities in that region.
Both cables provide excellent sound quality in my experience, but I personally give the nod to the SR implementation for the reasons noted above.
Dave
The AQ method provides a much cleaner installation with the battery packs attached to the cable and no external wiring, but the SR active-shielding allows tuning of the power source (via cost-effective mods to the MPC by fellow-member Michael Spallone) and changing the Tuning Bullets (introduced with the Tesla SE and carried on to the Element series).
Michael’s mods were a step-function improvement in sound quality across the board and the SR tuning bullets provide audible changes in the upper-frequency character of my system. Very nice to have the ability to slightly alter/tune the highly-hearing-sensitive upper-frequency region where the enjoyment of cymbals and female vocals is especially sensitive (to me) to open-ness and also glare depending on the individual system’s proclivities in that region.
Both cables provide excellent sound quality in my experience, but I personally give the nod to the SR implementation for the reasons noted above.
Dave