Subwoofer - thoughts on Rythmic F12

In my opinion and experience, you are better off using a line level input. A speaker level signal will have a little more distortion and it will be converted back to a line level signal by the subs speaker level circuitry anyway, but it will still contain the distortion created by your main amps output.

If you noticed more detail in the bass notes after disconnecting your current subs it maybe because you have the low pass filter on the subs set too high, enabling too much frequency overlap between your subs and your F208’s. The 3 db down point on the F208’s is 31 Hz, so you might be able to set the low pass filter slightly above that, but more than likely it will have to be set below that, which unfortunately doesn’t leave much for your subs to do. You may want to consider high passing your mains which would lessen their work load and also reduce unwanted cabinet vibrations created by F208’s low end drivers giving you even cleaner and more detailed sound from your mains.

I bought one with the paper cone several years ago to experiment with. I liked it. I also got it in a piano ebony finish- not sure if that was a normal option. So I bought a pair of the 15 inch units- also ebony piano finish- those don't have a paper cone- for my main system. I use them with a small DSP controller just for very low bass 55hz down with a 24 db/octave roll off. They work great. The 12 now serves yeoman's duty in a small home theatre set up in our front lounge and is fine. Brian is a nice guy and even came to visit since I now live in Austin. Good company. Good product. Good value. 

In the main system, the sub system runs in parallel to the main system from a line output off the line stage- nothing is in the middle of the main system, electronically- power amps (SETs from Lamm) directly to mid-horns with no Xover. Wasn't terribly hard to dial in either with the continuous phase control. 

Hi everyone. I received my F12 - looks great and well packed, and seemed very solid and well made. Unfortunately it was the wrong model. I ordered the PEQ3 but was sent the XLR3. What is crazy is the box was mislabeled so no way for the shipping warehouse to know! I hope for Brian’s sake it was not the entire container that was mislabeled. I had that happen to a client once and they said it was a pain to pull and verify and re-mark each product.

Has anyone else had this happen with their Rythmik sub?

This stuff happens. I have an email into Rythmik with pictures and we will get it worked out. I will keep this thread updated and provide listening impressions/comparisons to my older SVS sb12 when I have the correct model. Thanks.

Where are your two SVS SB-12 NSD subwoofers located in your room? And / or how did you come to decide on those positions?

It's quite possible new units maybe faced with similar demanding room positioning interactions.