Sub routing w/second sub routing specified 50/50

whoareyou

Member
Thread Starter
Joined
Dec 23, 2021
Messages
57
My AV System  
Main Amp
Benchmark AHB2
Additional Amp
ATI AT525NC
Computer Audio
JRiver
DAC
Exasound E38
Front Speakers
Psb synchrony one
Center Channel Speaker
PSB synchrony one C
Surround Speakers
Revel m105
I added a second sub as below and specified a 50/50 split in routing matrix.
In speaker and bass management I then split the sub routing between the FL,FR,C,SR,SL speakers per image below.

One sub is used for XO by 3 channels and other sub used by only 2 channels, so the XO routing is not a 50/50 split.

How does AL handle this situation? Is maintaining a 50/50 split important for the XO settings (i.e should one of the XO's include both subwoofers to maintain a 50/50 split), or
does the 50/50 split only apply to the actual bass channel present in a multichannel recording?

Thanks


speakerSetup.jpg

SubRouting.jpg
 

jrobbins50

Member
Joined
Oct 4, 2018
Messages
123
Why do you want to split the bass in this fashion? If you select route bass to all subs, then you won’t need to pick the bass routing and bass from every channel will get routed, 50-50, to the two subs.

If you really mean to route bass from specific channels to a specific sub, then your routing is fine. But then, I would guess that you need to select 1.00 for the low frequency playback for each sub, since you aren’t summing and splitting.

Bernt can confirm or deny my guess. JCR
 

whoareyou

Member
Thread Starter
Joined
Dec 23, 2021
Messages
57
My AV System  
Main Amp
Benchmark AHB2
Additional Amp
ATI AT525NC
Computer Audio
JRiver
DAC
Exasound E38
Front Speakers
Psb synchrony one
Center Channel Speaker
PSB synchrony one C
Surround Speakers
Revel m105
Why do you want to split the bass in this fashion? If you select route bass to all subs, then you won’t need to pick the bass routing and bass from every channel will get routed, 50-50, to the two subs.

If you really mean to route bass from specific channels to a specific sub, then your routing is fine. But then, I would guess that you need to select 1.00 for the low frequency playback for each sub, since you aren’t summing and splitting.

Bernt can confirm or deny my guess. JCR
No matter where I've moved my subs, they always end up working against one another close to where I'd like to use them for improving the bass response.
For example, brown and blue are subs and green is a side speaker. I get better results when only one sub is used because the two subs seem to cancel each other out at around the 30hz point.
I have similar issue with other speakers at various XO'ver points when both subs are involved.
Thanks


subExample.jpg
 

whoareyou

Member
Thread Starter
Joined
Dec 23, 2021
Messages
57
My AV System  
Main Amp
Benchmark AHB2
Additional Amp
ATI AT525NC
Computer Audio
JRiver
DAC
Exasound E38
Front Speakers
Psb synchrony one
Center Channel Speaker
PSB synchrony one C
Surround Speakers
Revel m105
@juicehifi - Hi Bernt, can you provide any more information for how the matrix percentage impacts XO vs individual sub channel?

Thanks
 

whoareyou

Member
Thread Starter
Joined
Dec 23, 2021
Messages
57
My AV System  
Main Amp
Benchmark AHB2
Additional Amp
ATI AT525NC
Computer Audio
JRiver
DAC
Exasound E38
Front Speakers
Psb synchrony one
Center Channel Speaker
PSB synchrony one C
Surround Speakers
Revel m105
When you create a two sub, 5.2 layout, using the default Audiolense configuration is as follows and the
channel routing as in the next image
default.jpg




defaultRouting.jpg


Source material's main bass is output via two subs, so it seems the .5 / .5 values are correct for the source material's main bass channel.

But is the .5 / .5 setting in matrix in any way relevant to the crossovers?

For example, AL's default configuration for 5.2 evenly divides between the 5 & 6 bass channels.
(Two subs used for XO on the center channel), so that half of XO comes from each sub channel.

Hope this makes more sense. Not sure how else to explain.

Then again, maybe I just don't understand this routing matrix
 

juicehifi

Audiolense
Staff member
Joined
Feb 5, 2018
Messages
418
What you see on the format tab is routing of the the various formats that you have configured (or that was configured as default). In addition to the bass management you see here, you will have bass offloading from each main speaker as per the speaker tab. Those two are different and work independant of each other. The .05 figures only apply to the LFE signal in 5.1 format here.

If you for example sent "low frequency" (the LFE) to the center speaker in the format tab, it would still be split between the two subwoofers, since they are used to offload bass from the center speaker. The difference between the two configurations would be that there would be no low pass if you sent the LFE to the center speaker. In other words, any high frequency artifacts in the LFE feed would be played by the center speaker.

I hope this clarifies it.
 

Ofer

New Member
Joined
Mar 15, 2021
Messages
55
My AV System  
Preamp, Processor or Receiver
miniDSP 4x10hd
Main Amp
Emotiva XPR200 midrange amp
Additional Amp
Crest audio 2001A bass amp
Other Amp
Rotel RA930ax twitter amp
Computer Audio
Sony Bravia android TV
DAC
miniDSP 4*10HD
Front Speakers
Andromeda MkII
Screen
Sony bravia 65XF9005
Streaming Subscriptions
Deezer HiFi
Other Equipment
Marantz original 5E CD
Is it possible to have the mains and sub(s) both play the low frequency (overlap)? i.e. having no high-pass filter for mains and sub(s) but different low-pass filter?
for example: sub plays 10-80hz and mains (front left and front right) play 10-20khz.
That way the sub only boosts the low end but doesn't offload the all the low frequency from the main speakers.
 
Last edited:
Top Bottom