I had some problems with my SVS PB13-Ultra subwoofer bottoming out in some movies, portshuffing.
I was thinking about buying another one, when my acoustician (spelling?
) told me a DIY build would get me more output and probably better sounding too, for less money. I was sceptical at first about building something that could outperform a PB13-Ultra, but started to read up on how to build.
We decided to go with the Dayton Audio HF 15" elements. Four of them in 2 subs with ~255 liters/each of net volume, before adding element and bracing inside of the box. For power we chose the Inuke DSP6000. It gives ~1100RMS W in 8 ohm/channel resulting in about 550W per element.
Here are a few pictures I took from the build:
And here are they after 3 layers of paint. My Audiovector K3 signatures look like toothpicks
And how do they sound? Well, after Audessy and some use of the Inuke DSP, I got a flat response from 100Hz down to 25Hz, with a small housecurve in the lower 20's. The sound from these are _amazing_. Outperforming the PB13-Ultra in both SPL, depth and quality of the sound. These integrate so much better with my fronts and center, seamless.
Here is a unsmoothed graph (before using a housecurve) from REW with a calibrated mick and loopback calibration on the soundcard. The dB-scale is as you can see, not calibrated. The volume was about as high as I use when listening to music. I don't expect it to look exactly like that tough when watching movies at 85dB+. Not at 5hz
At this volume I had under 1% distortion from 10Hz to 80Hz, REW won't show distortion under 10Hz.
You will have to excuse my english