Yes, I have noticed that too about the gain control, the amp with the bypass would be at 6 o'clock, while the other 2 amps with the 150hz would be at 10 o'clock to be at the same spl. I've read somewhere that the powder coating used on the flat silver woofers reduces ringing vibrations, go figure.

Maybe the software for the 150hz amps were not updated cuz they still brickwall at 100hz. Shame cuz I was planning to feed them a full range stereo signal for stereo bass and cross them at 120hz.


Velo DD18,2xAxiom EP500,2xeD A7-450,2xSVS PB13U,2xSVS SB13P,2xInfinity Kappa12mbm, 2xB&W PCS8