Why are you skeptical? Got bad result before?

You only should be concerned if the setting is at the extreme ends (plus or minus).

In your case fronts at -5 dB is normal. Mine is at -7 dB. However, for your sub at -15 dB is at the extreme end. This indicates some kind of set up issue - simplest thing to try is decrease the volume control on the sub and rerun Audyssey.

When u rerun Audyssey just use the minimum 3 positions (to save time). This is just to see if it sets the sub trim higher than -15 dB.

During the Audyssey calibration, when the test tone is sent to your sub is it very loud? Normally the only reason why Audyssey would set the trim so much to -15 dB is if it thinks the test tone is too loud and it needs to compensate.

I didn't have any trouble with Audyssey with my previous Velo CHT-12Q. I recall Audyssey set the sub trim to -2 dB (and sub volume itself was at 30).

I guess different AVR implements it slightly differently when it comes to levels. Either that or there is a lot of gain variance in the Velo subs

Looking at your graph again, I think the limit of the EQ1's boost is around +10 dB, which is quite good. Some other devices might be limited to +6 dB or less.

Also, can you check with SVS if the EQ1 equalizes below 20 Hz? I notice the portion below 20 Hz looks about the same as the 'before'. Previously I did ask on AVS if MultEQ XT equalizes below 20 Hz but didn't get any definite answer.

Having different trim settings for speakers is quite common, nothing to worry about. It is not necessary to match the trim setting for your sub and speakers.

Your front speakers are likely different from your center and surround (maybe different brand, different impedance, different sensitivity). For your sub, a lot will depend on how loud you set the gain control on your sub.

I think that depends on the loudness of the test tone sent by the EQ1. If I'm not mistaken the test tone is probably 75 - 85 dB.

That's why on many graphs you sometimes see a statement like "does not denote maximum output".

Yes, I agree that it is more useful info to know what is the max loudness where a sub will maintain a flat graph. However, testing at 75-80dB is the industry standard.

Some time ago a new standard called CEA-2010 was introduced to test subs. You can read about it here: http://www.paragonhometheaters.com/news_info/tab4.htm This measures max clean output (as opposed to max flat output you mentioned). Unfortunately sub makers haven't adopted CEA-2010 when reporting performance specs.

This is unusual. When I run Audyssey (using 3 positions for quick runs) the results are quite consistent from run to run.

Maybe as others have said, your ambient noise was different from run to run. Were your mic positions the same?

Possibly. If you have a high back chair and your mic is lower than the back it can affect the results. In those cases you should set the mic higher than the back of the chair.

Otherwise generally the mic should be put at ear height.

So I guess it is ideal to have all the bass gone by 300 ms?

If I'm reading correctly, there's still a touch of bass around at 300 ms at 20Hz, 24Hz, ~50Hz and ~60-70HZ but fairly low amplitude (60 dB and below). Am I reading correctly?

Is this floor noise quite prevalent in all homes/rooms?

I see. I did measure my room using the CM140. At night, when there is little external noise it is about 40-41 dB (this is everything turned off).

Yeah, the air-con is now the weak point in terms of noise

According to specs, the CM140 is good up to 8kHz.

Audyssey does not allow manual adjustment of the EQ. So you will not see any equalizer bands for Audyssey that are user selectable.

However, I understand that Audyssey can adjust down to 20Hz (or maybe even lower).

Excellent!

Yup, bass is a very individual thing. Some people are bass heads and some not.




Moving the sofa away will affect the Audyssey since the sofa acts as an absorber. No wonder the sound in your last run is different. Normally you should leave your room as is.

Nope.