Jakeg123 Posted January 6, 2010 Share Posted January 6, 2010 My new Yamaha RX-V765 was finally delivered! Now I am finally trying to go through some of the settings on it. I have never had a receiver before that let me change the crossover. What should I set the crossover to? What would work best with my RF-62s, RC-62, RS-42s, and Sub-12? I was thinking either 60Hz or 80Hz? (I currently have all of my speakers set to "small") Quote Link to comment Share on other sites More sharing options...
Mr. RF62 Posted January 6, 2010 Share Posted January 6, 2010 Hi Jake, glad to hear you got a new receiver, I did too. The THX standard is 80Hz, but I have experimented with 60 and it doesn't sound too bad. Depends on your room/size, plus do you like it LOUD or comfortable. One thing to keep in mind is with a 80Hz x-over point, your receiver doesn't have to work as hard as with a 60 Hz point, how much difference I don't know but I have noticed my old Yamaha would get a little warmer when using the 60Hz point. Quote Link to comment Share on other sites More sharing options...
Jakeg123 Posted January 6, 2010 Author Share Posted January 6, 2010 I have been playing around with it for a little bit and it seems to sound better to crossover at 80Hz and to let the sub do more work. I am not completely sure yet, though. Quote Link to comment Share on other sites More sharing options...
nezff Posted January 7, 2010 Share Posted January 7, 2010 yes, i would set everything to 80. I had my RF63s set to 60hz at one point and the rest of my setup at 80hz. it sounded good. Quote Link to comment Share on other sites More sharing options...
Xki Posted January 8, 2010 Share Posted January 8, 2010 I'll pile on a question here. If your mains go down to xHz, why is it better to set the x-over to x+30Hz? The RF-62 is rateddown to 39Hz +/- 3db. I would start the testing with the x-over at 40. Am I completely, utterly wrong here? Is there a stated rationalle for the THX-80Hz cutoff? Quote Link to comment Share on other sites More sharing options...
odysseyrevolver Posted January 9, 2010 Share Posted January 9, 2010 Is there a stated rationalle for the THX-80Hz cutoff? Most people have small crap speakers? Use whatever sounds best to you, man. I have my Corns at 60hz, Heresies at 70hz and Academy at 80hz. Quote Link to comment Share on other sites More sharing options...
DrWho Posted January 9, 2010 Share Posted January 9, 2010 I'll pile on a question here. If your mains go down to xHz, why is it better to set the x-over to x+30Hz? The RF-62 is rateddown to 39Hz +/- 3db. I would start the testing with the x-over at 40. Am I completely, utterly wrong here? Is there a stated rationalle for the THX-80Hz cutoff? Limiting the low frequency extension of a speaker reduces its distortion at higher frequencies. Also, a xover is not an instaneous transfer between speakers...you should have a good octave of bandwidth around the xover frequency in order to maintain good acoustic summation. Also, the phase response of a speaker starts getting crazy near its low frequency cutoff, which makes dialing in the xover that much more difficult. Most studios are using an 80Hz xover on their subs, so hitting the same xover point makes it easier to dial in the subwoofer and compensate for any possible monitoring irregularities in the studio (most studios run the sub a touch too hot). Trying to run the sub hotter with a lower xover frequency like 40Hz means the range from 40-80Hz won't get adjusted with the subwoofer level. And finally, the average listening environment starts to have strong room modes at around 100Hz and below. The purpose of running a single subwoofer is that you can find a location in the room that optimizes the modal response....often times the mains need to be positioned differently in order to optimize the imaging of the system. I definitely wouldn't consider a lower xover unless your mains don't suffer from modal issues between 40-80Hz (which probably won't be the case). The only advantage to crossing over lower is that the subwoofer doesn't need to work as hard. However, 20-40Hz is only one octave. 40Hz to 2kHz is nearly 6 octaves, which puts a lot of strain on the woofers in your mains (relatively speaking). Quote Link to comment Share on other sites More sharing options...
peshewah Posted January 9, 2010 Share Posted January 9, 2010 I have a set-up alot like yours and I have mine set at 60hz. Quote Link to comment Share on other sites More sharing options...
Xki Posted January 9, 2010 Share Posted January 9, 2010 Now that IS reason enough to rethink where I have the subs set. Thanks so much DrWho. There are at least 10 reasons in your post to do some serious comparisons. Step 1, turn the receiver's LF cutoff "ON". Regards, XKI Quote Link to comment Share on other sites More sharing options...
Xki Posted January 9, 2010 Share Posted January 9, 2010 Thanks guys for all the input! I hope Jakeg123 is following. Based on my newly found uncertainty, about the only thing I would tell you (Jake) is to try setting all your speakers to 'large'. I tried small for the smaller speakers and was very disappointed. Quote Link to comment Share on other sites More sharing options...
DrWho Posted January 9, 2010 Share Posted January 9, 2010 I tried small for the smaller speakers and was very disappointed. Did you try adjusting the phase of the subwoofer? I've found that's usually an indication that you've got phase cancellation happening... Quote Link to comment Share on other sites More sharing options...
Xki Posted January 9, 2010 Share Posted January 9, 2010 Mike, the subs are in phase. My surronds/backs set to 'large' reproduce the low end fairly well. When I set them to small, there are too many <200Hz frequencies routed to the mains. It just messes up the separation. I'm happy with the sound. I will play with the crossover freq. and the sub settings to maximize the 'warmth' of the entire range. (My 4 year old fliped the switch on 1 of the subs putting it out of phase and it took 2 seconds to notice.) Honestly, I am really surprised that the RB-25s put out as much as they do. Set to 'large' they can sing. When playing music in muti-channel stereo mode the room is filled. I found, as you stated, that the room below 100Hz is really picky. I'm glad the sweet spot for viewing is also the sweet spot for listening. I've been VERY lucky. Although, an inch or so makes a huge difference. The wife never knows where the furnishings will be when I'm in testing mode. Quote Link to comment Share on other sites More sharing options...
Jakeg123 Posted January 9, 2010 Author Share Posted January 9, 2010 Thank you for providing so much information everyone! i have been playing around with my setting a lot lately. I think i am going to leave my crossover at 80Hz. Something about it just sounds good. I had everyone in my family give their opinion. It is amazing how even a little thing like setting the crossover can be so fun to play with! At the moment my speakers are set to small. I have always heard that I should set them to small and I haven't even listened to them set to large. I am not home right now, but I will be sure to try out setting them to Large when I get home! Quote Link to comment Share on other sites More sharing options...
odysseyrevolver Posted January 10, 2010 Share Posted January 10, 2010 Thank you for providing so much information everyone! i have been playing around with my setting a lot lately. I think i am going to leave my crossover at 80Hz. Something about it just sounds good. I had everyone in my family give their opinion. It is amazing how even a little thing like setting the crossover can be so fun to play with! At the moment my speakers are set to small. I have always heard that I should set them to small and I haven't even listened to them set to large. I am not home right now, but I will be sure to try out setting them to Large when I get home! There is no crossover point when you set your speakers to large. Quote Link to comment Share on other sites More sharing options...
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