Setting subwoofer crossover, info needed.

[pieman109]

Right, I've got an MS avant 302 5.1 surround spkr set and I'm attempting to set the subwoofer crossover point. The knob on the rear of the sub goes from 40-150hz which I understand, but the amp, a cambridge audio CA 540R, has a setting called "LFE" which I'm lead to believe is the option to set the amlifier Xover point (sets the frquency range sent to the sub) and is graduated "-10 db to 0db.
Can someone here tell me which end of this scale sets the higher Xover point, -10db or 0db?
Ie: I want to set 150hz 'frintance, do I set nearer -10db or 0db.

Sorry I haven't explained it very well but I'm hoping someone here understands what I after.

 

[pieman109]

Thanks for the info guys, I think someone in the past suggested to me that the LFE fuction was crossover point and not attenuation (volume), -10db being the lowest and 0db being the loudest. Where can I get this THX tone sweep thing, I assume when you say advert, its that sort of demo bit you get before a film?

 

[pieman109]

some dvd's have thx tests as an extra.. I'm sure T2 had it ?

oh & as for setting up subs..

If you can hear it, its too loud.

I've made a few adjustments using the controls on the sub and its improved the sound a fair bit using that THX test you get on some discs. I agree with the sub volume being set very low, I've a few systems where the sub is so loud, it tends to overpower everything else. I've always thought that the saying "if you can hear it, its too loud" is true here. All I need to do is set the relative volume levels of each spkr and I think thats it. Thanks guys.