Very much enjoying my new FV-12. I am wondering how the line level inputs work with regard to this amplifier. Somewhere in this thread I thought I remembered reading that running a "Y" so that both sub inputs are fed from the same line input results in a "3 db" gain in volume. Is this so? The way I'm running it now, I've got one input fed by the line out of my music preamp (full frequency, using sub low pass to adjust bass blend), and the other fed by my LFE (low freq effects) output from the other preamp/processor I use for HT. (Actually for movies I rely on the DAC processing and 5.1 outs in the Sony ES Blu-Ray player (which are much better than that in the pre/pro), and the preamp just serves as the "volume control.") The music preamp is "off" while playing movies (L/R amp has both balanced and unbalanced inputs, switchable, so I don't have to move interconnect cables), so that only one input to FV12 is fed at a time. This is convenient for me, as I enjoy both 2 channel music and my 5.1 HT.
Now does this really mean I have 3db less amplifier power available, or is it just a matter of setting the volume control a bit higher for the same output levels? That is, is the amplifier actually a stereo pair, so that I'm only using a maximum 150W at a time when feeding only one line input?
It would be interesting to see a schematic or line diagram for that amp - is one available on-line somewhere?
Second question: for those who've used both the paper cone FV12 and the much more expensive F12, is the characteristic sound of the woofer driver different? I've found the FV12 from 25-60 hz is musical sounding, and fairly "tight" - and it really doesn't seem to matter too much how the damping is set. I use a CD with test tones from 20hz on up to set mine up, switching the main amp on and off to hear the effect of the sub alone, and with L/R main speakers. It blends well, and is "musical," but I wonder how much better the other units "sound." I realize the FV12 is recommended to be used only with the bass management of a home theater processor/receiver, but mine is blending well with my L/R monitors in stereo usage too.
My personal philosophy about bass has always been that you're mainly paying for horsepower and that "moving air" is the sub's job, and these FV12s certainly do that well. The servo system is fantastic, and, at this price point, just unprecedented. For background, I've used a Velodyne F1500 servo for many years, and have admired the servo technology ever since buying it, but, of course, it cost a lot more than the FV12. Congratulations on offering such as great product at such a great price! Now, sell me on getting a separate F12 or F15 for my music system!