I was thinking about this some more. I understand how it could influence the L/R mains because they can play down to 40Hz. If this is true about the receiver's pink noise and RS meter, why does it sound the same when being played by the center and surrounds. Both speakers can only go to 100Hz. They are both set only 1-2dB higher than the mains. Wouldn't they need to be "boosted" by more than a couple dB?The Radio Shack meter is being tricked by using the test tones in the receiver when you're setting the speaker level trims. The huge peak you have is what the meter is reading and so the mains get set low. You will have to use REW to set your levels between the mains and sub.......
Both graphs in post #101 and #107, the subs were turned off. The LFM xo is set to about 50Hz and the MBM is bypassed right now. I can switch the MBM to 80Hz but from the previous graphs, the 50Hz spike was done by the mains (L/R) only.Don't the LFM-1 and the MBM have their own crossover settings? Try making measurements with both turned off and with one or the other switched on to see which is making the biggest contribution to that peak and try adjusting the crossover settings on the subs.
It's my understanding that an MBM's crossover is a high pass that controls its mix with the main subwoofers internal low pass (for example, at 50Hz). Then the receiver/processors crossover is set to 80Hz for example to feed the mixed pair.Don't the LFM-1 and the MBM have their own crossover settings?
The MBM design naturally rolls off at 45-50Hz, therefore no xo needed (just one on the main sub to blend). It is capable up past 120Hz. The typical set-up is to use the receiver's xo (usually set to 80Hz for nearfield placement) to blend with the mains and not be localized. There are set-ups where two are placed up front with the mains and are xo at 120Hz. Still though, the receiver's xo is used.It's my understanding that an MBM's crossover is a high pass that controls its mix with the main subwoofers internal low pass (for example, at 50Hz). Then the receiver/processors crossover is set to 80Hz for example to feed the mixed pair.
This means that the MBM would not have its upper limit controlled if a receiver/crossover was not engaged...
Doesn't seem likely, but easy to check. Connect the output of the soundcards digital output to the digital input of the receiver instead of the analog line-out.Is it possible because the disc is through optical versus REW is through an analog connection there is a difference?
I'm having the exact same problem, yet even with the advice Brucek gave you, I cannot figure it out?! Hmm...Any helpers, please.I am trying to start using REW. Can you please help point me in the right direction on measurments. This is the graph I am getting. What am I missing? :huh:
Welcome to the Forum, Jason! We're happy to help, but it would be best if you started a new thread. That way we can concentrate on your specific issues. :TI'm having the exact same problem, yet even with the advice Brucek gave you, I cannot figure it out?! Hmm...Any helpers, please.