XMC1 speaker level setting

[bolle]

I would suggest you to hire a local professional to set your system up if you have problems with such basic questions.

If not, don´t be lazy. Look up your speakers frequency response and set the crossover frequency according to the speakers frequency response.

Regarding Q, there is no Q for crossovers. You seem to be mixing things up with the EQ settings. And for those no one can give you a general advice, too dependent on your room, placement etc. - so you have to measure yourself or get a professional to do that for you.

[panchakshari]

Just my centre LSiM 706c received after replacing tweeter, midrange also network.
Just I open my XMC-1 for settings, my default was frequency 50hz, now I reset for 80hz. Kindly suggest me, what is width, Q, tone frequency..?
Also suggest for fronts LSiM 707..
Thanks

[goozoo]

Dec 26, 2017 22:24:28 GMT -5 Masif said:

Hi keith ,

I need some help in setting speaker levels in my XMC-1. I've pair of TektonDesign - Double Impact tower speakers and per Tekton its 98db sensivity and i'm using radio-shack Spl meter.

I am measuring speaker levels using XMC's 75db test tone, front left/right speakers is at -12db but still my SPL meter is showing 80db, I've a SVS PB13 subwoofer, volume in the subwoofer is set at -10db, XMC subwoofer level is at  -1.0db and my spl shows 75db

How do I measure all speakers level at 75db? Should I target for 80db instead? When do we use 65db (low) testone in XMC?

Thanks

The reason for the difference has to do with your speaker sensitivity versus gain output on your amplifier.  In these cases, you would typically turn down the gain on the amp (if possible) and achieve the correct SPL reading.  As has been pointed out, the output levels of pink noise from the XMC-1 are relative values.  In technical terms, they mean that you will achieve an RMS (average) value of that amount (e.g. 85dB) with a specific peak output at unity gain (volume at 0dB); in this example 105dB.  This is the number used by most mixing studios for movie soundtracks and helpful in that regard.  DIRAC sets your levels at 0dB after measurements as a relative value compared to what you used during testing.  In other words, say you had your speakers set to 80dB while taking measurements; once testing was complete, that 80 becomes now your new 0 dB.  As Geebo has suggested, it is important to take new readings at this level with pink noise and adjust accordingly as needed relative to one speaker (e.g. left front).    

With respect to setting crossover settings, there are a couple things to keep in mind.  As you increase the crossover, the more localized the sound becomes out of the speaker.  The easiest way to determine the crossover of the speakers in your room is to look at the pre-corrected graph for the speaker in DIRAC to see where the drop off is as compared to the specs published for the speaker.  This is about where you want the crossover to be.  80Hz is often suggested as a starting point as research has shown it  difficult to localize the sound origin at this point.  I disagree with this statement and feel that it is based on the type of speakers that you have and their in-room response.  The Double Impact towers are very high resolution speakers and need to be dialed in carefully as they are very good at revealing any flaws in your system.