at "stock" settings (min. frequency on AquaComputer Aquastream; "Normal" mode jumper setting on Innovatek HPPS+), which pump is quieter? Do either pumps have aural eccentricities, such as growling characteristics, buzzing and whatnot? (plpease don't recomend a Laing DDC over either pumps for its superior performance, I've heard a recording of one before and hated its high-frequency whine) thanks in advance N
