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Frequency curves
#22626 10/19/03 11:20 PM
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I recently bought the Epic 80 system minus the sub, and I am wondering if anyone here could post the frequency response curves for the M80tis, the VP-150 center, and the QS-8 surrounds. I am looking for the best starting place to cross over to the sub. Any help would be greatly appreciated!


"Life, liberty, and the persuit of happiness"...Go Packers! and Go Badgers!
Re: Frequency curves
#22627 10/19/03 11:22 PM
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I dont know if they have it or not but try looking in the reviews for the M80's and epic 80 system.

Im sure Ian or alan will be able to tell you where is a good place to start.

Re: Frequency curves
#22628 10/19/03 11:25 PM
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Re: Frequency curves
#22629 10/19/03 11:40 PM
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Stunning how quickly you both replied! Thanks for the info...now can anybody help on the center and surrounds? (especially the center!)


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Re: Frequency curves
#22630 10/19/03 11:43 PM
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I havn't been able to find anything on those other two, but I'd imagine that the VP150 is fairly close but without the extended bass response.


Re: Frequency curves
#22631 10/19/03 11:46 PM
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I'd personally set the reciever's crossover at 50 Hz (since that is most likey a second order Low Pass crossover to the sub and first order High Pass for the mains), and then have the sub's Low Pass crossing over at about 60-70 Hz (as that can be either first or second order - and experimentation and room placement have a big factor here).


Re: Frequency curves
#22632 10/20/03 01:44 AM
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Bill, although the M80s have substantial bass of their own, as shown by the anechoic response curve Will(DJ)linked, I'd suggest that you still use the THX recommended 80Hz crossover for all speakers. If your sub is good(and the 16-46 certainly is) it will be still better than the M80 in that 40-80Hz octave and should be allowed to do what it does best, relieving the M80s of part of the load there. Also, that crossover is suitable for the VP-150 and QS-8s, so don't be concerned about any tweaking of that area(even if your equipment can set different crossovers).

Last edited by JohnK; 10/20/03 01:50 AM.

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Re: Frequency curves
#22633 10/20/03 04:18 AM
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Unless you can set different crossover points for the center and surrounds....I would set the crossover no lower than 80mhz. The +/- 3db point on the VP150 is 85hz, and on the QS8 it is 95hz, setting the xover at 80mhz would seem to leave a gap.....that would concern me more for the center than the surrounds. The center carries a lot of special effects info.

-curtis

Re: Frequency curves
#22634 10/20/03 11:10 AM
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I have an Outlaw 950 pre/pro. It has the ability to set different crossovers for the mains, center and surround. My options are 40hz, 60hz, 80hz, 100hz, and 120hz. I was thinking 60hz, 100hz, and 120hz respectively for the M80s, the VP-150, and the QS-8s. This was based of the -3db points of the speakers and the fact that the center and surrounds are sealed while the ported M80s will have a greater rolloff and need to be crossed over about an octave higher than their -3db point. Am I incorrect?


"Life, liberty, and the persuit of happiness"...Go Packers! and Go Badgers!
Re: Frequency curves
#22635 10/20/03 06:17 PM
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