I have a list of "ideal" attributes for a pre/pro. Among the list, is being able to set individual HP and LP frequencies for each speaker, *and* being able to pick the slopes for each as well. Someday maybe!

Hi,

Im also a new user of the 950/7100 combo and Im just begining to try to configure the crossover,etc.

One question:

Bossobass wrote:
"With a 24 dB/octave crossover network a good rule of thumb is to set the crossover point at least 1/2 to 1 octave away from the cutoff frequency of the speaker. Thus a satellite with a cutoff of 5o Hz at the low end that is used with a subwoofer requires a crossover frequency of 75-100 Hz. The subwoofer should then have a range extending 1/2 to 1 octave above the crossover frequency..." Dr. Phil (Marchand)


I have mainspeakers with a cutoff around 40Hz, so following this advice I should set up the 950 crossover at 80Hz, right?
My subwoofer has a variable filter ranging from 40Hz to 160 Hz. Again, following this advice, should I set it up to 160Hz (so its 1 octave above the 950 crossover)???

I know that the ears are the final judge, but just wanted to understand if this is what they are suggesting.

Thanks!
Nestor

I have noticed excellent bass response with High Rez sources while also experiencing somewhat anemic bass with regular CDs. Source resolution and level withstanding, I do not understand why I lose bass impact on CDs at full range settings.

I have powered towers, Boston VR975, (with both speaker and line level connections). I wonder if somehow I am getting a phase cancellation between the speaker level and RCA level inputs. I have never found out just how those speakers are wired. The woofer will run on just speaker level.

I don't feel I have lost definition, just level.

NS:

The quote states that if you select 80Hz (for example), then your sub should have a response to 1/2 to 1 octave above that. In other words, if you select 80 Hz as a crossover point, the low pass and the high pass filters of the crossover are 80 Hz.

The filters are not brick wall. They rolloff at a rate of 24 dB/octave. They overlap the mains and the sub so that there is unity of signal across all frequencies in the overlap region. So, the sub should be capable of response to at least 1/2 octave above 80 Hz, or 120 Hz.

bossobass:

Thanks, so I guess its what I understood...


Mains cutoff around 40Hz, so the 950 crossover should be between 60 and 80 Hz (1/2 - 1 octave above) and the subwoofer should reproduce at least up to 120 Hz (or higher)

Will start my listening tests with 80Hz for the 950 and the subw open up to 160Hz, and trying varations from there...

thanks again!
Nestor

NS: You definitely got it...let us know what x-over point you end up liking the best.