Originally Posted by Legairre
Hey guys I've been trying to figure out why I love the house curve with my miniDSP 2x4 HD so much more than using a house curve with Genesis with the Deep Bass Boost combined with the Deep Bass Boost Frequency. I really want to get rid of the miniDSP 2x4 HD and just use Genesis for my house curve. The house curve through Genesis and the miniDSP 2x4 HD achieve the same seat of the pants feeling, but the sound is different. The house curve with the miniDSP sounds so much cleaner and the bass is clearer and uncluttered compared to using Genesis for a house curve. I’ve been trying to figure out why the Genesis house feels the same as the miniDSP house curve but just doesn’t sound nearly as good.
Well just by luck while I was typing up the steps on how to build a house curve in Genesis for a fellow AVS-er I noticed something while going through the steps in Genesis. I noticed in Genesis as I increased the Deep Bass Boost that it not only increases the bass for the sub it also increases the bass for EVERY single speaker in your system so you get a house curve built on every speaker in your system not just the sub. If you set the Deep Bass Boost Frequency to say 50Hz and the Deep Bass Boost to 6dB every speaker gets a house curve from 50Hz downward. Just try it and look at the low end of all your speakers get a house curve.
With the miniDSP house curve it’s only effecting the sub but in Genesis every speaker is getting a house curve so that’s why the Genesis house curve sounds different than the miniDSP house curve. To me the Genies house curve just sounds muddied compared to the the miniDSP house curve but at least now I know why I have to keep my miniDSP.. I want a house curve on my sub not all my speakers.
Also since the Deep Bass Boost and Deep Bass Boost Frequency are on the "System Wide Target" screen for each profile I should have known these settings would effect all speakers not just the sub.
Originally Posted by WLC
I know you are knowledgeable, so I don't really understand why you are having this effect with the Bass Boost in Genesis if you are using crossovers. My 7 speakers are all crossed at 80hz. Therefore, the entire Bass Boost, which for me starts at 40hz, can only be sent to the subs.
Is there something I'm not understanding?
The advantage of a house curve for my 2.2 stereo using a minidsp with dirac is that I can precisely pinpoint the curve. For example, I have 22 hz raised 6db, 200hz lowered to -4db and 16000hz lowered an additional -4. I can't be quite this precise with Genesis. However, with a Bass Boost of -6 starting at 40hz and a tilt of +8 starting at 500hz, it sounds very good.
This is an interesting thread, and I am enjoying learning more about ARC Genesis. It sounds very cool! I started by reading the most recent posts and have since been reading the thread from the beginning. I think I can explain why the bass might sound relatively more muddled (compared to boosting only the subwoofers, below a certain frequency
) with the Deep Bass Boost affecting all of the speakers and not just the subs.
AVR crossovers use high-pass filters and low-pass filters to provide more gradual transitions from speakers to subwoofers. Those filters don't act as brick walls, abruptly cutting-off the sound. They just gradually attenuate the sound. That way, we aren't suddenly hearing the subwoofers cut-on, and the speakers cut-off. Typically, the high-pass filter for the speakers reduces the volume by 12db per octave. So, implementing an 80Hz crossover would gradually and symmetrically roll-off the volume of those speakers by 12db at 40Hz.
But, if you are boosting all of the channels by 6db at 40Hz, you are adding back 6db at that specific frequency. Now the speakers, which were getting softer from 80Hz down, are suddenly louder again, and a 6db increase in volume at 40Hz could make enough difference to be audible. That would especially be the case if you were able to compare that sound to a completely different approach, such as the application of a house curve added only to the subwoofers.
Frankly, I think that some speakers might distort a bit if they were playing 40Hz frequencies only 6db lower than they were having to play 80Hz frequencies, and the muddled sound could be that distortion. Of course, that would depend somewhat on the master volume level and the native content. The louder the volume level, the more potential distortion. (There can also be some potential phase issues involved when speakers and subs--particularly ported subs--play the same frequencies.)
Low-frequency distortion tends to sound somewhat boomy or unclear, unlike high-frequency distortion which sounds screechy or piercing. A somewhat unclear or cluttered bass sound could be a pretty good description of low-frequency distortion. Boosting channels by 6db at 40Hz could actually be considered somewhat counterproductive to setting 80Hz crossovers for those channels in the first place.
I don't want anyone who is currently enjoying that feature to suddenly become self-conscious about it because of my post. But, it occurs to me that since Anthem seems to be pretty cutting-edge with their updates, it might be worthwhile for some owners to contact them about allowing users to choose whether or not to apply the Deep Bass Boost to all of the channels, as opposed to applying it only to the subwoofers. Or, ARC could just let that feature affect only the subwoofers, by default. That would be an even better solution.
I hope that no one minds me commenting on this.