This is a very simple device, consisting is a very high quality potentiometer in an aluminium enclosure, very minimalistic and classy in design. The rotary knob feels smooth, as expected most of the volume reduction is smooth up until the last part where the drop is mostly accentuated. I can't hear any loss of quality or colouration introduced by the circuit, I measured the SPL from my speakers and it appears that there is practically no attenuation in sound level when the unit is at its peak position (although the experiment was not perfectly accurate since I had to hold the mic with my hands). The pot is not dented, and there are no indicators other than a single one on top of the knob, however the min position is roughly between the TC and the max falls on the C of the brand :) so you have a way to visually understand where you are. I advice in calibrating the volume of the speakers at max and measure it (I have it at 83dbf each) and use the pot to reduce the volume. The attached wire is very long, but despite that you need additional cables since the balanced extensions are too short, about 50 cm apart.
TC Electronic Level Pilot is a fine volume button that does what it should and is easy to install. takes up little space and looks great. You have a good control over the volume and the sound is fair. However, the drawback is (at least the one I bought) that there is quite a lot of residual noise (hiss), particularly at high levels.
Overall a good product if you take the price in to consideration.
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