High pass quality to mains uisng Velodyne DD subs

Vladimir, you should take note that using the SMS will overide the servo control in Velodyne's subs and I would guess in others as well. That's the only reason I don't use one with my DD15. If your sub doesn't have servo control then it will not matter.

Rwwear,

I'm not following your last comment. The DD15 comes with the SMS built in. Are you not using the built-in low pass and equalization?

Yes it does and I am but I would like to have one just for the fact I could see the readout without a TV. And it will control other subs.

Eldartford, I guess your points make sense. By the way, the Velodyne high pass is also 6dB/octave.

Rwwear, I know what you say, but I would use the SMS-1 with my current REL and maybe an ACI Force later.

Hello Folks,

I own a DD15 and Dynaudio S1.4 speakers, and I have tried using the sub both ways.

Using the crossover and high passing the mains is the much better real-world choice. Every major sonic attribute is imrproved when you do this, all the way through to the midrange tone and transparency.

When you use the high pass, your midrange driver is freed from having to try and reproduce the bass along with the midrange in the same driver. The amplifier is also freed from the burden of dealing with the bass frequencies.

These advantages outweigh any theoretical "more circuitry in the signal path" problems by orders of magnitude.