Sub question

[novisnick]

I have an RMC-1 and a pair of PSA S3000i subs. I use my RMC-1 for both two channel and HT, most times two channel without the subs, therefore I’d like to run my towers full range. 
When setting up your speakers for HT ( test tones ) how do you set your dials on the sub? Gain? Crossover? Room size?

12’6” X 16’ X 8’  cave measurements with plenty of acoustic treatments

7.2.4 Atmos

How would you set this system / room up. 

[donh50]

I set the gain so the AVR or processor trim settings are roughly in the middle of the range. Some set them so the sub trim is low, allowing them to artificially increase sub (deep bass) output.

Crossover is usually around 80 Hz as that is where most (vast majority) of folk cannot localize the sub (cannot place it in the room sonically). My rule of thumb is to crossover an octave above the -3 dB frequency of the speakers if at all possible. Near the -3 dB signals get large and most speakers begin to distort heavily. Some people like that, as the harmonics are more audible than the fundamental frequencies, so it sounds "fuller". Distorted, but "fuller".

Room size dictates where room modes lie (bazilions of mode calculators online; I use a Mathcad or Matlab program I wrote ages ago). Rooms with dimensions that are multiples (or submultiples) lead to multiple modes and thus deeper nulls as signals reflect off room surfaces and interact to cancel and add. Room correction programs have limited correction range (*) and will generally not try to boost a null. Since true nulls come about from signals canceling there are very difficult to correct; 1 - 1 = 0 and 100 - 100 is still 0. Rooms with dimensions that are relatively prime or "Golden ratios" tend to have fewer modal issues. Note in a sealed rectangular room there is always a null in the middle so sitting at the 1/3 or so point from either end is better for bass.

FWIWFM - Don

(*) Dirac Live can provide 10 dB of boost but "infinite" cut so it easy to pull down a peak but impossible to correct a deep null. Nulls can be 20~40 dB in a room. Treatment does help tame them; in one sense they make the room "bigger" or more like outdoors so nulls are less substantial.

[SteveH]

Jul 29, 2019 17:33:37 GMT -5 novisnick said:

I have an RMC-1 and a pair of PSA S3000i subs. I use my RMC-1 for both two channel and HT, most times two channel without the subs, therefore I’d like to run my towers full range. 

Once you get those subs set up, you will love the results.  My RMC-1 is set up for Dual Mono subs.  I do like the performance of my towers using the RMC-1's Reference Stereo mode, but once you add the subs using Direct mode or Stereo mode, you will still be using the full range of the towers but now you have the extra oomph of the subs, you will be impressed.

Enjoy!

[novisnick]

Aug 17, 2019 9:36:15 GMT -5 SteveH said:

Jul 29, 2019 17:33:37 GMT -5 novisnick said:

I have an RMC-1 and a pair of PSA S3000i subs. I use my RMC-1 for both two channel and HT, most times two channel without the subs, therefore I’d like to run my towers full range. 

Once you get those subs set up, you will love the results.  My RMC-1 is set up for Dual Mono subs.  I do like the performance of my towers using the RMC-1's Reference Stereo mode, but once you add the subs using Direct mode or Stereo mode, you will still be using the full range of the towers but now you have the extra oomph of the subs, you will be impressed.

Enjoy!

Yes sir! I’ve dialed my subs in for the last to FW updates and the results are fantastic! They’re responsive and articulate as I expected them to be. lonnie is doing a fine job!