Setting crossover frequency on avr

Posts: 198
edited July 2011 in Speakers
running a new setup rti8's a6 & rti6's
When setting crossover frequency in the avr should i set the crossover "at" "above" or "below" the speakers specs?
Post edited by jojomgee on

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  • Posts: 661
    edited July 2011
    You want to set the crossover above the lower -3db lower frequency response limit of the speaker. Some say you should set the crossover as high as 1 octave above the lower -3db limit. If it were me, I would probably set the crossover no lower than 60Hz for the RTi8, and no lower than 80Hz for the CSi A6 and RTi6. If you can't set a separate crossover point for each channel/pair, my suggestion would be to set it at 80Hz.
    2.1: PC>Schiit Gungnir MB>Schiit Freya Noval>NAD C-270>Ascend Acoustics Sierra-1, HSU STF-2 5.1: HDMI Bitstream>Denon AVR-1910>polkaudio RTE55, CS350-LS, RT3, HSU STF-2, Visio M55-F0
  • Posts: 198
    edited July 2011
    i can set separate for each channel....
    im not exactly understanding your explanation though....i understand what the -3db limit is but what would "1 octave above " mean?
    the -3db on the 8's is 40hz overall 30-27
    6's is 50hz overall 40-27
    A6 is 55hz overall 45-27
    is 1octave basically 20-30 hz?
  • Posts: 661
    edited July 2011
    1 octave up = frequency x2. Therefore, one octave above 40Hz would be 80Hz. 50Hz+1 octave=100Hz, etc.

    1 octave down = frequency/2. Therefore, one octave below 40Hz would be 20Hz. 50Hz-1 octave=25Hz, etc.

    I personally think, while a good rule of thumb, using the octave rule can a bit overkill, therefore my suggestions were a bit more conservative. You do want to give yourself some room between -3db and the crossover though, to keep the frequency response as flat as possible in that band.
    2.1: PC>Schiit Gungnir MB>Schiit Freya Noval>NAD C-270>Ascend Acoustics Sierra-1, HSU STF-2 5.1: HDMI Bitstream>Denon AVR-1910>polkaudio RTE55, CS350-LS, RT3, HSU STF-2, Visio M55-F0
  • Posts: 3,263
    edited July 2011
    I normally use a half-octave. A full octave almost never sounds as good, and kinda' negates the point of having floor-standers. With the slope of the crossover used in AVRs, a half-octave above the -3dB point normally gives you a very smooth transition because the in-room performance of the speaker will typically be lower than the -3dB point anyway.
    Equipment list:
    Onkyo TX-NR3010 9.2 AVR
    Emotiva XPA-3 amp
    Polk RTi70 mains, CSi40 center, RTi38 surrounds, RTi28 rears and heights
    SVS 20-39CS+ subwoofer powered by Crown XLS1500
    Oppo BDP-93 Blu-ray player
    DarbeeVision DVP5000 video processor
    Epson 8500UB 1080p projector
    Elite Screens Sable 120" CineWhite screen
  • Posts: 198
    edited July 2011
    One more question....i use the rti6's for rears..if i set the crossover to lets say "60hz" I will get more bass from rears... right?
  • Posts: 1,449
    edited July 2011
    jojomgee wrote: »
    One more question....i use the rti6's for rears..if i set the crossover to lets say "60hz" I will get more bass from rears... right?

    The real question to ask you is: What do you listen to more - movies or music? What does the AVR set the crossovers at?
  • Posts: 198
    edited July 2011
    90% movies
    and i dont understand your second question....i thought i manually set the crossovers
  • Posts: 5,106
    edited July 2011
    80Hz & set to small.
    "2 Channel & 11.2 HT "Two Channel:Magnepan LRSSchiit Audio Freya S - SS preConsonance Ref 50 - Tube preParasound HALO A21+ 2 channel ampBluesound NODE 2i streameriFi NEO iDSD DAC Oppo BDP-93KEF KC62 sub Home Theater:Full blown 11.2 set up.

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