Axiom Home Page Forums General Discussion Home Theater QS8 owners what is your crossover set at?

Good post Legairre,

I don't really notice a hole BUT part of the enjoyment of HT is the tweaking.

You're Idea with the subs is kinda neat, but I guess it forces the placement of your surround subs.

Did it work well? also does that mean you have 3 subs?

As I recall, the only way to control the x-overs with the Outlaw ICBM for all sources is if you use separates.

Another plus for the ICBM is that it has stereo sub pre-outs.

bridgeman can you please elaborate about what you were saying with the hk's why would "something" have to be crossed over at 100hz? im not to knowledgeable about the difference between low pass filter and high pass filter

Wow! lots of good info in here now. I posted right after 2x6spds and i didn't know al you guys had joined in so thank you to everyone for contributing. This method was described in a magazine article that had 7 pages of movies with surround bass down to 50hz in the surrounds. It's really just a way of simutating a full range speakers in the rear.

In reply to:

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You're Idea with the subs is kinda neat, but I guess it forces the placement of your surround subs.

Did it work well? also does that mean you have 3 subs?

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You really do want the subs under the surrounds since they play the bass part of the full range signal below the high pass crossover and the surrounds play the frequencies above the crossover. It's like having full range speakers in the rear, but without a big speaker taking up space and standing tall.

I have four subs two 250w 12" subs for the low pass LFE with one in each front corner and the two high pass 150w 10" surround subs. It sounds like a lot of subs, but the surround ones are just helping simulate full range speakers in the rear while the two front play all the LFE. This setup allows a lot of flexibility, because my center is rated to 45hz and my fronts to 32hz so a 60hz crossover for the fronts and center works great while a 75hz high pass crossover works great in the surrounds. The surround subs catch any surround bass(not LFE) below 75hz while the surround speakers handle everything above the high pass crossover.

Yes!! Thank-you everyone for responding.

In between reading and posts I checked out this link. Good introductory to bass management and how important it could be with sacd/dvd-a

good tutorial on bass management

Legairre,

Sounds (reads) like a really nice set-up!

kk, i read that tutorial but i still dont understand what bridgman was talking about with the hk's as far as low pass filter and LFE

Ooo..so now I need one of those. What's the WAF on another $250.

The just of it, I think is that H/K will allow for multiple crossovers whereas my denon won't.

If all your speakers frequecy ranges, are not the same, one crossover (say 80 hz) may leave a hole in your listening environment.
I think that's what your asking...

Hope this helps.


Crossover: A component that divides an audio signal into two or more ranges by frequency, sending, for example, low frequencies to one output and high frequencies to another. An active crossover is powered and divides the line-level audio signal prior to amplification. A passive crossover uses no external power supply and may be used either at line level or, more commonly, at speaker level to divide the signal after amplification and send the low frequencies to the woofer and the high frequencies to the tweeter.

Crossover Frequency: The frequency at which an audio signal is divided. 80 Hz is a typical subwoofer crossover point and is the recommended crossover point in theatrical and home THX systems. Frequencies below 80 Hz are sent to the subwoofer; signals above 80 Hz are sent to the main speakers

Frequency Response: A measure of what frequencies can be reproduced and how accurately they are reproduced. A measurement of 20 to 20,000 Hz ± 3dB means those frequencies between 20 and 20,000 Hz can be reproduced no more than 3 dB above or below a reference frequency level.

LFE: Low Frequency Effects track. The .1 channel of a Dolby Digital, DTS, or SDDS soundtrack. The LFE is strictly low-frequency information (20 to 120 Hz, with 115 dB of dynamic range) that's added to the soundtrack for extra effect. This track does not inherently contain all the bass of the soundtrack.


Low Pass: A filter that lets low frequencies go through but doesn't let high frequencies go through. Same as high cut


High Pass: A filter that passes high frequencies, and attenuates low frequencies. Same as low cut.


gloosary

Something for BrenR

p.s. because BrenR has some of the most in depth responses on these boards.