If I could put in my two cents? I tried what jonaro wanted to do by muting my reciever and you get no test tone, so you can't see any freq response. and Gonk what I meant to say in my last post.I hope I wasn't a bother with all the questions. thanks

You weren't a bother, loopy. Q&A is one of the reasons that we all gather here, after all.

Shutting off my amps is not an easy process (the M200's are under the TV, and probably the only way to turn them off short of hiring a leprechaun to crawl into the cabinet would be to unplug the amps at the power conditioner), so it didn't even occur to me to try it. I did mute the SMS-1 some to see how the mains faired without the sub, but that's about it.

you can't mute your receiver as that is the source of your test tone. i turned off my amp which sends the test tone to my mains. i'm not sure if it is providing any useful info to me. i've been messing with the slope which came as a default of 24/db and i honestly can't see any change in my freq curve.

what i found handy is to overlay my 990 menu with the sms curve so that i can see changes made thru my 990 immediately on my freq curve of the sms. realized that a 60hz crossover resulted in a smoother freq curve sans the big dips i was getting at a 80hz crossover.

another big help is to write down where you put your slides and their settings as it makes it easy to compare various tweaks you might have done.

a cool feature that isn't included, but i wish was, would be the ability to compare freq curves to determine which one ultimately was better. you can make so many small tweaks that it is easy to lose track of what you had in terms of a freq curve and what you now have. hope that makes sense.

Good point. One trick to do what you are thinking of would be to experiment with adjusting each preset's EQ separately and flip between them to compare - then write down the settings that work best and apply them to the "setup" preset.

good point gonk. lots of practice till my new sub comes!

also I tried setting the crossover in the sms to 60 and left my reciever at 80 seemto smooth things out for me, I was worried about noise or low output because that is what it says in the manual I also adjusted the phase on the subs I have a volume type phase, I set one to 180 and one to about 40 and it brought up some of the dips boy there so much you can do be it bring up the volume, change crossovers etc. having lots of fun playing though.

loopy,

you are cascading your crossovers. use either your pre-pro or the sms but not both.

can you use it at the same crossover, I put it at 80 which is what my reciever is at and used the 24DB octave slope and it smoothes my response out or is this not the right thing to do,I have just been doing different things to try get the respone flat,the way it's set up I only have to boost or cut with the eq 1 to 1.5 db on the slides from 20 to100 But if you think what i'm doing is wrong I will change it again thanks guys

Two crossovers at the same point will essentially create a dip in response around that point - the two crossovers' slopes will basically combine, exaggerating the effect of the slope. It is something that is generally recommended against, but with the SMS-1's ability to show you exactly what is happening I'm a little less leery of the idea (after all, you can see the flat response, so there's no dip created).

The one problem I see with using the SMS-1's crossover at all when also using a receiver's crossover is that any LFE soundtrack data (the information contained only in the .1 channel) above 80Hz (or wherever the SMS-1's crossover is set) will be lost. The ideal approach would be to turn off the SMS-1's crossover since your receiver already takes care of bass management. If there is a peak at 80Hz afterward, you can try to flatten it out with the EQ. You might also play with your receiver's crossover point if it allows it. Jongaro did this - he moved his crossover from 80Hz to 60Hz - and was able to get a flatter response, but not all receivers have enough bass management flexibility to make this a convenient option.

yes I'll try that, I 'm still playing around with it to see what things do but a big difference came with just adjusting the phase on the two subs.