Dynaudio sub with C1's

Xtp16
If your Rel sub sounds slow its because of self induced stored energy. There are methods and devices that collect and disapate these resonaces. The stored mechanical energy will blend itself with any note to follow. These methods should be applied before you move away from the Rel to another sub. You may have never experienced the Rel in its full glory Any other sub or speaker would also benefit from the same applied method. Tom

George,
I agree with Bob about the use of an external crossover. If you go this route make sure the crossover has a variable phase control. A zero or 180 phase switch just doesn't get it. I know by using and measuring the in room response with a pair of Paradigm X-30 crossovers, my system was best with this pair set at 70 degrees.

Also why did you use only two points and not four on your Rel? I use a Sistrum Sp101 under each of my subs. Makes for greater speed, resolution and yes better midrange even with the subs crossed at 45hz. Remember any cabinet itself radiates sound into the room. The less energy storage over time the better the sound. I am a dealer. Tom

George,

I first placed the Sp101 platforms so that one leg fell with in the footprint of the stands that hold my mains. This way I could place each sub as close to its partner as possible. I then aligned the sub on its platform so its voice coil was as close as I could measure to that of the mains. I played a test tone that was about the same frequency as the crossover point. Having an RTA allowed me to measure the frequency response of the mains and the subs. Adjusting the phase control from zero to 180 degrees while viewing the RTA screen I found that the subs measured and also sounded best with a 70 degree phase angle. My mains have a first order crossover at 2400hz and are run full range. Tom